Package org.codehaus.groovy.runtime

Class ArrayGroovyMethods

java.lang.Object

org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport

org.codehaus.groovy.runtime.ArrayGroovyMethods

public class ArrayGroovyMethods
extends DefaultGroovyMethodsSupport

Defines new groovy methods which appear on arrays inside the Groovy environment. Static methods are used with the first parameter being the destination class, i.e. public static int[] each(int[] self, Closure closure) provides an each({i -> }) method for int[].

NOTE: While this class contains many 'public' static methods, it is primarily regarded as an internal class (its internal package name suggests this also). We value backwards compatibility of these methods when used within Groovy but value less backwards compatibility at the Java method call level. I.e. future versions of Groovy may remove or move a method call in this file but would normally aim to keep the method available from within Groovy.

Method Summary

Modifier and Type	Method	Description
static boolean	any(boolean[] self)	Iterates over the contents of a boolean Array, and checks whether any element is true.
static boolean	any(boolean[] self, Closure<?> predicate)	Iterates over the contents of a boolean Array, and checks whether a predicate is valid for at least one element.
static boolean	any(byte[] self, Closure<?> predicate)	Iterates over the contents of a byte Array, and checks whether a predicate is valid for at least one element.
static boolean	any(char[] self, Closure<?> predicate)	Iterates over the contents of a char Array, and checks whether a predicate is valid for at least one element.
static boolean	any(double[] self, Closure<?> predicate)	Iterates over the contents of a double Array, and checks whether a predicate is valid for at least one element.
static boolean	any(float[] self, Closure<?> predicate)	Iterates over the contents of a float Array, and checks whether a predicate is valid for at least one element.
static boolean	any(int[] self, Closure<?> predicate)	Iterates over the contents of an int Array, and checks whether a predicate is valid for at least one element.
static boolean	any(long[] self, Closure<?> predicate)	Iterates over the contents of a long Array, and checks whether a predicate is valid for at least one element.
static boolean	any(short[] self, Closure<?> predicate)	Iterates over the contents of a short Array, and checks whether a predicate is valid for at least one element.
static <T> boolean	any(T[] self, Closure<?> predicate)	Iterates over the contents of an Array, and checks whether a predicate is valid for at least one element.
static boolean	asBoolean(boolean[] self)	Coerces a boolean array to a boolean value.
static boolean	asBoolean(byte[] self)	Coerces a byte array to a boolean value.
static boolean	asBoolean(char[] self)	Coerces a char array to a boolean value.
static boolean	asBoolean(double[] self)	Coerces a double array to a boolean value.
static boolean	asBoolean(float[] self)	Coerces a float array to a boolean value.
static boolean	asBoolean(int[] self)	Coerces an int array to a boolean value.
static boolean	asBoolean(long[] self)	Coerces a long array to a boolean value.
static boolean	asBoolean(short[] self)	Coerces a short array to a boolean value.
static boolean	asBoolean(Object[] self)	Coerces an object array to a boolean value.
static <T> T	asType(Object[] self, Class<T> type)	Converts the given array to either a List, Set, or SortedSet.
static BigDecimal	average(byte[] self)	Calculates the average of the bytes in the array.
static double	average(double[] self)	Calculates the average of the doubles in the array.
static double	average(float[] self)	Calculates the average of the floats in the array.
static BigDecimal	average(int[] self)	Calculates the average of the ints in the array.
static BigDecimal	average(long[] self)	Calculates the average of the longs in the array.
static BigDecimal	average(short[] self)	Calculates the average of the shorts in the array.
static Object	average(Object[] self)	Averages the items in an array.
static <T> Object	average(T[] self, Closure<?> closure)	Averages the result of applying a closure to each item of an array.
static List<List<Boolean>>	chop(boolean[] self, int... chopSizes)	Chops the boolean array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
static List<List<Byte>>	chop(byte[] self, int... chopSizes)	Chops the byte array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
static List<List<Character>>	chop(char[] self, int... chopSizes)	Chops the char array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
static List<List<Double>>	chop(double[] self, int... chopSizes)	Chops the double array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
static List<List<Float>>	chop(float[] self, int... chopSizes)	Chops the float array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
static List<List<Integer>>	chop(int[] self, int... chopSizes)	Chops the int array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
static List<List<Long>>	chop(long[] self, int... chopSizes)	Chops the long array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
static List<List<Short>>	chop(short[] self, int... chopSizes)	Chops the short array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
static <T> List<List<T>>	chop(T[] self, int... chopSizes)	Chops the array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
static <T> List<List<T>>	collate(T[] self, int size)	Collates an array.
static <T> List<List<T>>	collate(T[] self, int size, boolean keepRemainder)	Collates this array into sub-lists.
static <T> List<List<T>>	collate(T[] self, int size, int step)	Collates an array into sub-lists.
static <T> List<List<T>>	collate(T[] self, int size, int step, boolean keepRemainder)	Collates this array into sub-lists.
static <E, T, C extends Collection<T>> C	collect(E[] self, C collector, Closure<? extends T> transform)	Iterates through this Array transforming each item into a new value using the transform closure and adding it to the supplied collector.
static <E, T> List<T>	collect(E[] self, Closure<T> transform)	Iterates through this Array transforming each item into a new value using the transform closure, returning a list of transformed values.
static <K, V, E> Map<K,V>	collectEntries(E[] self)	A variant of collectEntries using the identity closure as the transform.
static <K, V, E> Map<K,V>	collectEntries(E[] self, Closure<?> transform)	Iterates through this array transforming each item using the transform closure and returning a map of the resulting transformed entries.
static <K, V, E> Map<K,V>	collectEntries(E[] self, Function<? super E,K> keyTransform, Function<? super E,V> valueTransform)	A variant of collectEntries for arrays with separate functions for transforming the keys and values.
static <K, V, E> Map<K,V>	collectEntries(E[] self, Map<K,V> collector)	A variant of collectEntries using the identity closure as the transform.
static <K, V, E> Map<K,V>	collectEntries(E[] self, Map<K,V> collector, Closure<?> transform)	Iterates through this array transforming each item using the transform closure and returning a map of the resulting transformed entries.
static <K, V, E> Map<K,V>	collectEntries(E[] self, Map<K,V> collector, Function<? super E,K> keyTransform, Function<? super E,V> valueTransform)	A variant of collectEntries for arrays with separate functions for transforming the keys and values.
static <T, E, C extends Collection<T>> C	collectMany(E[] self, C collector, Closure<? extends Collection<? extends T>> projection)	Projects each item from a source array to a collection and concatenates (flattens) the resulting collections into a single list.
static <T, E> List<T>	collectMany(E[] self, Closure<? extends Collection<? extends T>> projection)	Projects each item from a source array to a collection and concatenates (flattens) the resulting collections into a single list.
static boolean	contains(boolean[] self, Object value)	Checks whether the array contains the given value.
static boolean	contains(byte[] self, Object value)	Checks whether the array contains the given value.
static boolean	contains(char[] self, Object value)	Checks whether the array contains the given value.
static boolean	contains(double[] self, Object value)	Checks whether the array contains the given value.
static boolean	contains(float[] self, Object value)	Checks whether the array contains the given value.
static boolean	contains(int[] self, Object value)	Checks whether the array contains the given value.
static boolean	contains(long[] self, Object value)	Checks whether the array contains the given value.
static boolean	contains(short[] self, Object value)	Checks whether the array contains the given value.
static boolean	contains(Object[] self, Object value)	Checks whether the array contains the given value.
static Number	count(boolean[] self, Object value)	Counts the number of occurrences of the given value inside this array.
static Number	count(byte[] self, Object value)	Counts the number of occurrences of the given value inside this array.
static Number	count(char[] self, Object value)	Counts the number of occurrences of the given value inside this array.
static Number	count(double[] self, Object value)	Counts the number of occurrences of the given value inside this array.
static Number	count(float[] self, Object value)	Counts the number of occurrences of the given value inside this array.
static Number	count(int[] self, Object value)	Counts the number of occurrences of the given value inside this array.
static Number	count(long[] self, Object value)	Counts the number of occurrences of the given value inside this array.
static Number	count(short[] self, Object value)	Counts the number of occurrences of the given value inside this array.
static Number	count(Object[] self, Object value)	Counts the number of occurrences of the given value inside this array.
static <T> Number	count(T[] self, Closure<?> predicate)	Counts the number of occurrences which satisfy the given closure from inside this array.
static <E> Map<E,Integer>	countBy(E[] self)	Creates a multiset-like map of the array members.
static <K, E> Map<K,Integer>	countBy(E[] self, Closure<K> closure)	Sorts all array members into groups determined by the supplied mapping closure and counts the group size.
static <T> T[]	drop(T[] self, int num)	Drops the given number of elements from the head of this array if they are available.
static <T> T[]	dropRight(T[] self, int num)	Drops the given number of elements from the tail of this array if they are available.
static <T> T[]	dropWhile(T[] self, Closure<?> condition)	Create a suffix of the given array by dropping as many elements as possible from the front of the original array such that calling the given closure condition evaluates to true when passed each of the dropped elements.
static boolean[]	each(boolean[] self, Consumer<Boolean> consumer)	Iterates through a boolean[] passing each boolean to the given consumer.
static byte[]	each(byte[] self, Consumer<Byte> consumer)	Iterates through a byte[] passing each byte to the given consumer.
static char[]	each(char[] self, Consumer<Character> consumer)	Iterates through a char[] passing each char to the given consumer.
static double[]	each(double[] self, DoubleConsumer consumer)	Iterates through a double[] passing each double to the given consumer.
static float[]	each(float[] self, Consumer<Float> consumer)	Iterates through a float[] passing each float to the given consumer.
static int[]	each(int[] self, IntConsumer consumer)	Iterates through an int[] passing each int to the given consumer.
static long[]	each(long[] self, LongConsumer consumer)	Iterates through a long[] passing each long to the given consumer.
static short[]	each(short[] self, Consumer<Short> consumer)	Iterates through a short[] passing each short to the given consumer.
static <T> T[]	each(T[] self, Closure<?> closure)	Iterates through an array passing each array entry to the given closure.
static void	eachByte(byte[] self, Closure<?> closure)	Traverses through each byte of this byte array.
static void	eachByte(Byte[] self, Closure<?> closure)	Traverses through each byte of this Byte array.
static boolean[]	eachWithIndex(boolean[] self, Closure<?> closure)	Iterates through a boolean[], passing each boolean and the element's index (a counter starting at zero) to the given closure.
static byte[]	eachWithIndex(byte[] self, Closure<?> closure)	Iterates through a byte[], passing each byte and the element's index (a counter starting at zero) to the given closure.
static char[]	eachWithIndex(char[] self, Closure<?> closure)	Iterates through a char[], passing each char and the element's index (a counter starting at zero) to the given closure.
static double[]	eachWithIndex(double[] self, Closure<?> closure)	Iterates through a double[], passing each double and the element's index (a counter starting at zero) to the given closure.
static float[]	eachWithIndex(float[] self, Closure<?> closure)	Iterates through a float[], passing each float and the element's index (a counter starting at zero) to the given closure.
static int[]	eachWithIndex(int[] self, Closure<?> closure)	Iterates through an int[], passing each int and the element's index (a counter starting at zero) to the given closure.
static long[]	eachWithIndex(long[] self, Closure<?> closure)	Iterates through a long[], passing each long and the element's index (a counter starting at zero) to the given closure.
static short[]	eachWithIndex(short[] self, Closure<?> closure)	Iterates through a short[], passing each short and the element's index (a counter starting at zero) to the given closure.
static <T> T[]	eachWithIndex(T[] self, Closure<?> closure)	Iterates through an array, passing each array element and the element's index (a counter starting at zero) to the given closure.
static boolean	equals(boolean[] self, boolean[] right)	Compares the contents of this array to the contents of the given array.
static boolean	equals(byte[] self, byte[] right)	Compares the contents of this array to the contents of the given array.
static boolean	equals(char[] self, char[] right)	Compares the contents of this array to the contents of the given array.
static boolean	equals(double[] self, double[] right)	Compares the contents of this array to the contents of the given array.
static boolean	equals(float[] self, float[] right)	Compares the contents of this array to the contents of the given array.
static boolean	equals(int[] self, int[] right)	Compares the contents of this array to the contents of the given array.
static boolean	equals(long[] self, long[] right)	Compares the contents of this array to the contents of the given array.
static boolean	equals(short[] self, short[] right)	Compares the contents of this array to the contents of the given array.
static boolean	equals(Object[] left, List<?> right)	Determines if the contents of this array are equal to the contents of the given list, in the same order.
static boolean	every(boolean[] self)	Iterates over the contents of a boolean Array, and checks whether every element is true.
static boolean	every(boolean[] self, Closure<?> predicate)	Iterates over the contents of a boolean Array, and checks whether a predicate is valid for every element.
static boolean	every(byte[] self, Closure<?> predicate)	Iterates over the contents of a byte Array, and checks whether a predicate is valid for all elements.
static boolean	every(char[] self, Closure<?> predicate)	Iterates over the contents of a char Array, and checks whether a predicate is valid for all elements.
static boolean	every(double[] self, Closure<?> predicate)	Iterates over the contents of a double Array, and checks whether a predicate is valid for all elements.
static boolean	every(float[] self, Closure<?> predicate)	Iterates over the contents of a float Array, and checks whether a predicate is valid for all elements.
static boolean	every(int[] self, Closure<?> predicate)	Iterates over the contents of an int Array, and checks whether a predicate is valid for all elements.
static boolean	every(long[] self, Closure<?> predicate)	Iterates over the contents of a long Array, and checks whether a predicate is valid for all elements.
static boolean	every(short[] self, Closure<?> predicate)	Iterates over the contents of a short Array, and checks whether a predicate is valid for all elements.
static <T> boolean	every(T[] self, Closure<?> predicate)	Used to determine if the given predicate closure is valid (i.e.
static <T> T	find(T[] self, Closure<?> condition)	Finds the first element in the array that matches the given closure condition.
static <T> List<T>	findAll(T[] self)	Finds the elements of the array matching the IDENTITY Closure (i.e. matching Groovy truth).
static <T> List<T>	findAll(T[] self, Closure<?> condition)	Finds all elements of the array matching the given Closure condition.
static <T> int	findIndexOf(T[] self, int startIndex, Closure<?> condition)	Iterates over the elements of an array, starting from a specified index, and returns the index of the first item that satisfies the condition specified by the closure.
static <T> int	findIndexOf(T[] self, Closure<?> condition)	Iterates over the elements of an array and returns the index of the first item that satisfies the condition specified by the closure.
static <T> List<Number>	findIndexValues(T[] self, Closure<?> condition)	Iterates over the elements of an array and returns the index values of the items that match the condition specified in the closure.
static <T> List<Number>	findIndexValues(T[] self, Number startIndex, Closure<?> condition)	Iterates over the elements of an array, starting from a specified index, and returns the index values of the items that match the condition specified in the closure.
static <T> int	findLastIndexOf(T[] self, int lowerBound, Closure<?> condition)	Returns the index of the last item that matches the specified condition that is at or beyond the given index.
static <T> int	findLastIndexOf(T[] self, Closure<?> condition)	Returns the index of the last item that matches the specified condition.
static <S, T> T	findResult(S[] self, Closure<T> condition)	Iterates through the Array calling the given closure condition for each item but stopping once the first non-null result is found and returning that result.
static <S, T, U extends T, V extends T> T	findResult(S[] self, U defaultResult, Closure<V> condition)	Iterates through the Array calling the given closure condition for each item but stopping once the first non-null result is found and returning that result.
static <T> T	findResult(T[] self)	Iterates through the Array stopping once the first non-null result is found and returning that result.
static <T, U extends T, V extends T> T	findResult(U[] self, V defaultResult)	Iterates through the Array stopping once the first non-null result is found and returning that result.
static <T> Collection<T>	findResults(T[] self)	Iterates through the Array collecting any non-null results.
static <T, U> Collection<T>	findResults(U[] self, Closure<T> filteringTransform)	Iterates through the Array transforming items using the supplied closure and collecting any non-null results.
static boolean	first(boolean[] self)	Returns the first item from the boolean array.
static byte	first(byte[] self)	Returns the first item from the byte array.
static char	first(char[] self)	Returns the first item from the char array.
static double	first(double[] self)	Returns the first item from the double array.
static float	first(float[] self)	Returns the first item from the float array.
static int	first(int[] self)	Returns the first item from the int array.
static long	first(long[] self)	Returns the first item from the long array.
static short	first(short[] self)	Returns the first item from the short array.
static <T> T	first(T[] self)	Returns the first item from the array.
static List<Boolean>	flatten(boolean[] self)	Flattens an array.
static List<Boolean>	flatten(boolean[][] self)	Flattens a 2D array into a new collection.
static List<Byte>	flatten(byte[] self)	Flattens an array.
static List<Byte>	flatten(byte[][] self)	Flattens a 2D array into a new collection.
static List<Character>	flatten(char[] self)	Flattens an array.
static List<Character>	flatten(char[][] self)	Flattens a 2D array into a new collection.
static List<Double>	flatten(double[] self)	Flattens an array.
static List<Double>	flatten(double[][] self)	Flattens a 2D array into a new collection.
static List<Float>	flatten(float[] self)	Flattens an array.
static List<Float>	flatten(float[][] self)	Flattens a 2D array into a new collection.
static List<Integer>	flatten(int[] self)	Flattens an array.
static List<Integer>	flatten(int[][] self)	Flattens a 2D array into a new collection.
static List<Long>	flatten(long[] self)	Flattens an array.
static List<Long>	flatten(long[][] self)	Flattens a 2D array into a new collection.
static List<Short>	flatten(short[] self)	Flattens an array.
static List<Short>	flatten(short[][] self)	Flattens a 2D array into a new collection.
static List<Object>	flatten(Object[] self)	Flattens an array.
static Collection	flattenMany(Object[] self, Closure<?> transform)	Flatten an array.
static List<Boolean>	getAt(boolean[] array, IntRange range)	Supports the subscript operator for a boolean array with an IntRange giving the desired indices.
static List<Boolean>	getAt(boolean[] array, ObjectRange range)	Supports the subscript operator for a boolean array with an ObjectRange giving the desired indices.
static List<Boolean>	getAt(boolean[] array, Range<?> range)	Supports the subscript operator for a boolean array with a range giving the desired indices.
static List<Boolean>	getAt(boolean[] array, Collection<?> indices)	Supports the subscript operator for a boolean array with a (potentially nested) collection giving the desired indices.
static List<Byte>	getAt(byte[] array, IntRange range)	Supports the subscript operator for a byte array with an IntRange giving the desired indices.
static List<Byte>	getAt(byte[] array, ObjectRange range)	Supports the subscript operator for a byte array with an ObjectRange giving the desired indices.
static List<Byte>	getAt(byte[] array, Range<?> range)	Supports the subscript operator for a byte array with a range giving the desired indices.
static List<Byte>	getAt(byte[] array, Collection<?> indices)	Supports the subscript operator for a byte array with a (potentially nested) collection giving the desired indices.
static List<Character>	getAt(char[] array, IntRange range)	Supports the subscript operator for a char array with an IntRange giving the desired indices.
static List<Character>	getAt(char[] array, ObjectRange range)	Supports the subscript operator for a boolean array with an ObjectRange giving the desired indices.
static List<Character>	getAt(char[] array, Range<?> range)	Supports the subscript operator for a char array with a range giving the desired indices.
static List<Character>	getAt(char[] array, Collection<?> indices)	Supports the subscript operator for a char array with a (potentially nested) collection giving the desired indices.
static List<Double>	getAt(double[] array, IntRange range)	Supports the subscript operator for a double array with an IntRange giving the desired indices.
static List<Double>	getAt(double[] array, ObjectRange range)	Supports the subscript operator for a double array with an ObjectRange giving the desired indices.
static List<Double>	getAt(double[] array, Range<?> range)	Supports the subscript operator for a double array with a range giving the desired indices.
static List<Double>	getAt(double[] array, Collection<?> indices)	Supports the subscript operator for a double array with a (potentially nested) collection giving the desired indices.
static List<Float>	getAt(float[] array, IntRange range)	Supports the subscript operator for a float array with an IntRange giving the desired indices.
static List<Float>	getAt(float[] array, ObjectRange range)	Supports the subscript operator for a float array with an ObjectRange giving the desired indices.
static List<Float>	getAt(float[] array, Range<?> range)	Supports the subscript operator for a float array with a range giving the desired indices.
static List<Float>	getAt(float[] array, Collection<?> indices)	Supports the subscript operator for a float array with a (potentially nested) collection giving the desired indices.
static List<Integer>	getAt(int[] array, IntRange range)	Supports the subscript operator for an int array with an IntRange giving the desired indices.
static List<Integer>	getAt(int[] array, ObjectRange range)	Supports the subscript operator for an int array with an ObjectRange giving the desired indices.
static List<Integer>	getAt(int[] array, Range<?> range)	Supports the subscript operator for an int array with a range giving the desired indices.
static List<Integer>	getAt(int[] array, Collection<?> indices)	Supports the subscript operator for an int array with a (potentially nested) collection giving the desired indices.
static List<Long>	getAt(long[] array, IntRange range)	Supports the subscript operator for a long array with an IntRange giving the desired indices.
static List<Long>	getAt(long[] array, ObjectRange range)	Supports the subscript operator for a long array with an ObjectRange giving the desired indices.
static List<Long>	getAt(long[] array, Range<?> range)	Supports the subscript operator for a long array with a range giving the desired indices.
static List<Long>	getAt(long[] array, Collection<?> indices)	Supports the subscript operator for a long array with a (potentially nested) collection giving the desired indices.
static List<Short>	getAt(short[] array, IntRange range)	Supports the subscript operator for a short array with an IntRange giving the desired indices.
static List<Short>	getAt(short[] array, ObjectRange range)	Supports the subscript operator for a short array with an ObjectRange giving the desired indices.
static List<Short>	getAt(short[] array, Range<?> range)	Supports the subscript operator for a short array with a range giving the desired indices.
static List<Short>	getAt(short[] array, Collection<?> indices)	Supports the subscript operator for a short array with a (potentially nested) collection giving the desired indices.
static <T> List<T>	getAt(T[] array, EmptyRange<?> range)	Supports the subscript operator for an object array with an EmptyRange.
static <T> List<T>	getAt(T[] array, IntRange range)	Supports the subscript operator for an object array with an IntRange giving the desired indices.
static <T> List<T>	getAt(T[] array, ObjectRange range)	Supports the subscript operator for an object array with an ObjectRange giving the desired indices.
static <T> List<T>	getAt(T[] array, Range<?> range)	Supports the subscript operator for an object array with a range giving the desired indices.
static <T> List<T>	getAt(T[] array, Collection<?> indices)	Selects a List of items from an array using a Collection to identify the indices to be selected.
static IntRange	getIndices(boolean[] self)	Returns indices of the boolean array.
static IntRange	getIndices(byte[] self)	Returns indices of the byte array.
static IntRange	getIndices(char[] self)	Returns indices of the char array.
static IntRange	getIndices(double[] self)	Returns indices of the double array.
static IntRange	getIndices(float[] self)	Returns indices of the float array.
static IntRange	getIndices(int[] self)	Returns indices of the int array.
static IntRange	getIndices(long[] self)	Returns indices of the long array.
static IntRange	getIndices(short[] self)	Returns indices of the short array.
static <T> IntRange	getIndices(T[] self)	Returns indices of the array.
static <T> List<T>	grep(T[] self)	Iterates over the array returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.
static <T> List<T>	grep(T[] self, Object filter)	Iterates over the array of items and returns a collection of items that match the given filter - calling the DefaultGroovyMethods.isCase(Object,Object) method used by switch statements.
static Map	groupBy(Object[] self, Object... closures)	Sorts all array members into (sub)groups determined by the supplied mapping closures as per the Iterable variant of this method.
static Map	groupBy(Object[] self, List<Closure<?>> closures)	Sorts all array members into (sub)groups determined by the supplied mapping closures as per the list variant of this method.
static <K, T> Map<K,List<T>>	groupBy(T[] self, Closure<K> closure)	Sorts all array members into groups determined by the supplied mapping closure.
static boolean	head(boolean[] self)	Returns the first item from the boolean array.
static byte	head(byte[] self)	Returns the first item from the byte array.
static char	head(char[] self)	Returns the first item from the char array.
static double	head(double[] self)	Returns the first item from the double array.
static float	head(float[] self)	Returns the first item from the float array.
static int	head(int[] self)	Returns the first item from the int array.
static long	head(long[] self)	Returns the first item from the long array.
static short	head(short[] self)	Returns the first item from the short array.
static <T> T	head(T[] self)	Returns the first item from the Object array.
static Map<Integer,Double>	indexed(double[] self)	Zips a double[] with indices in (index, value) order starting from index 0.
static Map<Integer,Double>	indexed(double[] self, int offset)	Zips a double[] with indices in (index, value) order.
static Map<Integer,Integer>	indexed(int[] self)	Zips an int[] with indices in (index, value) order starting from index 0.
static Map<Integer,Integer>	indexed(int[] self, int offset)	Zips an int[] with indices in (index, value) order.
static Map<Integer,Long>	indexed(long[] self)	Zips a long[] with indices in (index, value) order starting from index 0.
static Map<Integer,Long>	indexed(long[] self, int offset)	Zips a long[] with indices in (index, value) order.
static int	indexOf(Object[] self, Object object)	Returns the index of the first occurrence of the specified element in the array.
static boolean[]	init(boolean[] self)	Returns the items from the boolean array excluding the last item.
static byte[]	init(byte[] self)	Returns the items from the byte array excluding the last item.
static char[]	init(char[] self)	Returns the items from the char array excluding the last item.
static double[]	init(double[] self)	Returns the items from the double array excluding the last item.
static float[]	init(float[] self)	Returns the items from the float array excluding the last item.
static int[]	init(int[] self)	Returns the items from the int array excluding the last item.
static long[]	init(long[] self)	Returns the items from the long array excluding the last item.
static short[]	init(short[] self)	Returns the items from the short array excluding the last item.
static <T> T[]	init(T[] self)	Returns the items from the Object array excluding the last item.
static <E extends T, T, V extends T> T	inject(E[] self, Closure<V> closure)	Iterates through the given array, passing the first two elements to the closure.
static <E, T, U extends T, V extends T> T	inject(E[] self, U initialValue, Closure<V> closure)	Iterates through the given array, passing in the initial value and the first element to the closure.
static <T> Iterator<T>	iterator(T[] self)	Returns an Iterator which traverses the given array in index order.
static String	join(boolean[] self)	Concatenates the string representation of each item in this array.
static String	join(boolean[] self, String separator)	Concatenates the string representation of each item in this array, with the given String as a separator between each item.
static String	join(byte[] self)	Concatenates the string representation of each item in this array.
static String	join(byte[] self, String separator)	Concatenates the string representation of each item in this array, with the given String as a separator between each item.
static String	join(char[] self)	Concatenates the string representation of each item in this array.
static String	join(char[] self, String separator)	Concatenates the string representation of each item in this array, with the given String as a separator between each item.
static String	join(double[] self)	Concatenates the string representation of each item in this array.
static String	join(double[] self, String separator)	Concatenates the string representation of each item in this array, with the given String as a separator between each item.
static String	join(float[] self)	Concatenates the string representation of each item in this array.
static String	join(float[] self, String separator)	Concatenates the string representation of each item in this array, with the given String as a separator between each item.
static String	join(int[] self)	Concatenates the string representation of each item in this array.
static String	join(int[] self, String separator)	Concatenates the string representation of each item in this array, with the given String as a separator between each item.
static String	join(long[] self)	Concatenates the string representation of each item in this array.
static String	join(long[] self, String separator)	Concatenates the string representation of each item in this array, with the given String as a separator between each item.
static String	join(short[] self)	Concatenates the string representation of each item in this array.
static String	join(short[] self, String separator)	Concatenates the string representation of each item in this array, with the given String as a separator between each item.
static String	join(Object[] self)	Concatenates the string representation of each item in this array.
static String	join(Object[] self, String separator)	Concatenates the string representation of each item in this array, with the given String as a separator between each item.
static boolean	last(boolean[] self)	Returns the last item from the boolean array.
static byte	last(byte[] self)	Returns the last item from the byte array.
static char	last(char[] self)	Returns the last item from the char array.
static double	last(double[] self)	Returns the last item from the double array.
static float	last(float[] self)	Returns the last item from the float array.
static int	last(int[] self)	Returns the last item from the int array.
static long	last(long[] self)	Returns the last item from the long array.
static short	last(short[] self)	Returns the last item from the short array.
static <T> T	last(T[] self)	Returns the last item from the array.
static int	lastIndexOf(Object[] self, Object object)	Returns the index of the last occurrence of the specified element in the array.
static double	max(double[] self)	Adds max() method to double arrays.
static double	max(double[] self, DoubleComparator comparator)	Selects the maximum value found from the double array using the supplier DoubleComparator to determine the maximum of any two values.
static double	max(double[] self, DoubleUnaryOperator operator)	Selects the maximum value found from the double array using the supplier DoubleUnaryOperator to determine the maximum of any two values.
static int	max(int[] self)	Adds max() method to int arrays.
static int	max(int[] self, IntComparator comparator)	Selects the maximum value found from the int array using the supplier IntBinaryOperator as a comparator to determine the maximum of any two values.
static int	max(int[] self, IntUnaryOperator operator)	Selects the maximum value found from the int array using the supplier IntUnaryOperator to determine the maximum of any two values.
static long	max(long[] self)	Adds max() method to long arrays.
static long	max(long[] self, LongComparator comparator)	Selects the maximum value found from the long array using the supplier LongBinaryOperator as a comparator to determine the maximum of any two values.
static long	max(long[] self, LongUnaryOperator operator)	Selects the maximum value found from the long array using the supplier LongUnaryOperator to determine the maximum of any two values.
static <T> T	max(T[] self)	Adds max() method to Object arrays.
static <T> T	max(T[] self, Closure<?> closure)	Selects the maximum value found from the Object array using the closure to determine the correct ordering.
static <T> T	max(T[] self, Comparator<? super T> comparator)	Selects the maximum value found from the Object array using the given comparator.
static double	maxBy(double[] self, Closure<?> closure)	Selects the maximum value found from the double array using the closure to determine the maximum of any two values.
static int	maxBy(int[] self, Closure<?> closure)	Selects the maximum value found from the int array using the closure to determine the maximum of any two values.
static long	maxBy(long[] self, Closure<?> closure)	Selects the maximum value found from the long array using the closure to determine the maximum of any two values.
static double	maxComparing(double[] self, Comparator<Double> comparator)	Selects the maximum value found from the double array using the comparator to determine the maximum of any two values.
static int	maxComparing(int[] self, Comparator<Integer> comparator)	Selects the maximum value found from the int array using the comparator to determine the maximum of any two values.
static long	maxComparing(long[] self, Comparator<Long> comparator)	Selects the maximum value found from the long array using the comparator to determine the maximum of any two values.
static double	min(double[] self)	Adds min() method to double arrays.
static double	min(double[] self, DoubleComparator comparator)	Selects the minimum value found from the double array using the supplier DoubleBinaryOperator as a comparator to determine the minimum of any two values.
static double	min(double[] self, DoubleUnaryOperator operator)	Selects the minimum value found from the double array using the supplier DoubleUnaryOperator to determine the minimum of any two values.
static int	min(int[] self)	Adds min() method to int arrays.
static int	min(int[] self, IntComparator comparator)	Selects the minimum value found from the int array using the supplier IntComparator to determine the minimum of any two values.
static int	min(int[] self, IntUnaryOperator operator)	Selects the minimum value found from the int array using the supplier IntUnaryOperator to determine the minimum of any two values.
static long	min(long[] self)	Adds min() method to long arrays.
static long	min(long[] self, LongComparator comparator)	Selects the minimum value found from the long array using the supplier LongBinaryOperator as a comparator to determine the minimum of any two values.
static long	min(long[] self, LongUnaryOperator operator)	Selects the minimum value found from the long array using the supplier LongUnaryOperator to determine the minimum of any two values.
static <T> T	min(T[] self)	Adds min() method to Object arrays.
static <T> T	min(T[] self, Closure<?> closure)	Selects the minimum value found from the Object array using the closure to determine the correct ordering.
static <T> T	min(T[] self, Comparator<? super T> comparator)	Selects the minimum value found from the Object array using the given comparator.
static double	minBy(double[] self, Closure<?> closure)	Selects the minimum value found from the double array using the closure to determine the minimum of any two values.
static int	minBy(int[] self, Closure<?> closure)	Selects the minimum value found from the int array using the closure to determine the minimum of any two values.
static long	minBy(long[] self, Closure<?> closure)	Selects the minimum value found from the long array using the closure to determine the minimum of any two values.
static double	minComparing(double[] self, Comparator<Double> comparator)	Selects the minimum value found from the double array using the comparator to determine the minimum of any two values.
static int	minComparing(int[] self, Comparator<Integer> comparator)	Selects the minimum value found from the int array using the comparator to determine the minimum of any two values.
static long	minComparing(long[] self, Comparator<Long> comparator)	Selects the minimum value found from the long array using the comparator to determine the minimum of any two values.
static <T> T[]	minus(T[] self, Iterable<?> removeMe)	Creates a new array composed of the elements of the first array minus the elements of the given Iterable.
static <T> T[]	minus(T[] self, Object removeMe)	Creates a new array composed of the elements of the given array minus every occurrence the given object.
static <T> T[]	minus(T[] self, Object[] removeMe)	Creates a new array composed of the elements of the first array minus the elements of the given array.
static <T> T[]	plus(T[] left, Iterable<?> right)	Creates an array containing elements from an original array plus those from an Iterable.
static <T> T[]	plus(T[] left, Object right)	Creates an array containing elements from an original array plus an additional appended element.
static <T> T[]	plus(T[] left, Object[] right)	Creates an array as a union of two arrays.
static <T> T[]	plus(T[] left, Collection<?> right)	Creates an array containing elements from an original array plus those from a Collection.
static boolean[]	reverse(boolean[] self)	Creates a new boolean array containing items which are the same as this array but in reverse order.
static boolean[]	reverse(boolean[] self, boolean mutate)	Reverses the items in an array.
static byte[]	reverse(byte[] self)	Creates a new byte array containing items which are the same as this array but in reverse order.
static byte[]	reverse(byte[] self, boolean mutate)	Reverses the items in an array.
static char[]	reverse(char[] self)	Creates a new char array containing items which are the same as this array but in reverse order.
static char[]	reverse(char[] self, boolean mutate)	Reverses the items in an array.
static double[]	reverse(double[] self)	Creates a new double array containing items which are the same as this array but in reverse order.
static double[]	reverse(double[] self, boolean mutate)	Reverses the items in an array.
static float[]	reverse(float[] self)	Creates a new float array containing items which are the same as this array but in reverse order.
static float[]	reverse(float[] self, boolean mutate)	Reverses the items in an array.
static int[]	reverse(int[] self)	Creates a new int array containing items which are the same as this array but in reverse order.
static int[]	reverse(int[] self, boolean mutate)	Reverses the items in an array.
static long[]	reverse(long[] self)	Creates a new long array containing items which are the same as this array but in reverse order.
static long[]	reverse(long[] self, boolean mutate)	Reverses the items in an array.
static short[]	reverse(short[] self)	Creates a new short array containing items which are the same as this array but in reverse order.
static short[]	reverse(short[] self, boolean mutate)	Reverses the items in an array.
static <T> T[]	reverse(T[] self)	Creates a new array containing items which are the same as this array but in reverse order.
static <T> T[]	reverse(T[] self, boolean mutate)	Reverses the items in an array.
static boolean[]	reverseEach(boolean[] self, Closure<?> closure)	Iterates through a boolean[] in reverse order passing each boolean to the given closure.
static byte[]	reverseEach(byte[] self, Closure<?> closure)	Iterates through a byte[] in reverse order passing each byte to the given closure.
static char[]	reverseEach(char[] self, Closure<?> closure)	Iterates through a char[] in reverse order passing each char to the given closure.
static double[]	reverseEach(double[] self, Closure<?> closure)	Iterates through a double[] in reverse order passing each double to the given closure.
static float[]	reverseEach(float[] self, Closure<?> closure)	Iterates through a float[] in reverse order passing each float to the given closure.
static int[]	reverseEach(int[] self, Closure<?> closure)	Iterates through an int[] in reverse order passing each int to the given closure.
static long[]	reverseEach(long[] self, Closure<?> closure)	Iterates through a long[] in reverse order passing each long to the given closure.
static short[]	reverseEach(short[] self, Closure<?> closure)	Iterates through a short[] in reverse order passing each short to the given closure.
static <T> T[]	reverseEach(T[] self, Closure<?> closure)	Iterates over each element of the array in the reverse order.
static <T> void	shuffle(T[] self)	Randomly reorders the elements of the specified array.
static <T> void	shuffle(T[] self, Random rnd)	Randomly reorders the elements of the specified array using the specified random instance as the source of randomness.
static <T> T[]	shuffled(T[] self)	Creates a new array containing the elements of the specified array but in a random order.
static <T> T[]	shuffled(T[] self, Random rnd)	Creates a new array containing the elements of the specified array but in a random order using the specified random instance as the source of randomness.
static int	size(boolean[] self)	Provides arrays with a size method similar to collections.
static int	size(byte[] self)	Provides arrays with a size method similar to collections.
static int	size(char[] self)	Provides arrays with a size method similar to collections.
static int	size(double[] self)	Provides arrays with a size method similar to collections.
static int	size(float[] self)	Provides arrays with a size method similar to collections.
static int	size(int[] self)	Provides arrays with a size method similar to collections.
static int	size(long[] self)	Provides arrays with a size method similar to collections.
static int	size(short[] self)	Provides arrays with a size method similar to collections.
static int	size(Object[] self)	Provides the standard Groovy size() method for an array.
static <T> T[]	sort(T[] self)	Modifies this array so that its elements are in sorted order.
static <T> T[]	sort(T[] self, boolean mutate)	Sorts the given array into sorted order.
static <T> T[]	sort(T[] self, boolean mutate, Closure<?> closure)	Modifies this array so that its elements are in sorted order using the Closure to determine the correct ordering.
static <T> T[]	sort(T[] self, boolean mutate, Comparator<? super T> comparator)	Modifies this array so that its elements are in sorted order as determined by the given comparator.
static <T> T[]	sort(T[] self, Closure<?> closure)	Sorts the elements from this array into a newly created array using the Closure to determine the correct ordering.
static <T> T[]	sort(T[] self, Comparator<? super T> comparator)	Sorts the given array into sorted order using the given comparator.
static <T> Collection<Collection<T>>	split(T[] self, Closure<?> closure)	Splits all items into two collections based on the closure condition.
static byte	sum(byte[] self)	Sums the items in an array.
static byte	sum(byte[] self, byte initialValue)	Sums the items in an array, adding the result to some initial value.
static char	sum(char[] self)	Sums the items in an array.
static char	sum(char[] self, char initialValue)	Sums the items in an array, adding the result to some initial value.
static double	sum(double[] self)	Sums the items in an array.
static double	sum(double[] self, double initialValue)	Sums the items in an array, adding the result to some initial value.
static float	sum(float[] self)	Sums the items in an array.
static float	sum(float[] self, float initialValue)	Sums the items in an array, adding the result to some initial value.
static int	sum(int[] self)	Sums the items in an array.
static int	sum(int[] self, int initialValue)	Sums the items in an array, adding the result to some initial value.
static long	sum(long[] self)	Sums the items in an array.
static long	sum(long[] self, long initialValue)	Sums the items in an array, adding the result to some initial value.
static short	sum(short[] self)	Sums the items in an array.
static short	sum(short[] self, short initialValue)	Sums the items in an array, adding the result to some initial value.
static Object	sum(Object[] self)	Sums the items in an array.
static Object	sum(Object[] self, Object initialValue)	Sums the items in an array, adding the result to some initial value.
static <T> Object	sum(T[] self, Closure<?> closure)	Sums the result of applying a closure to each item of an array.
static <T> Object	sum(T[] self, Object initialValue, Closure<?> closure)	Sums the result of applying a closure to each item of an array to some initial value.
static boolean[]	swap(boolean[] self, int i, int j)	Swaps two elements at the specified positions.
static byte[]	swap(byte[] self, int i, int j)	Swaps two elements at the specified positions.
static char[]	swap(char[] self, int i, int j)	Swaps two elements at the specified positions.
static double[]	swap(double[] self, int i, int j)	Swaps two elements at the specified positions.
static float[]	swap(float[] self, int i, int j)	Swaps two elements at the specified positions.
static int[]	swap(int[] self, int i, int j)	Swaps two elements at the specified positions.
static long[]	swap(long[] self, int i, int j)	Swaps two elements at the specified positions.
static short[]	swap(short[] self, int i, int j)	Swaps two elements at the specified positions.
static <T> T[]	swap(T[] self, int i, int j)	Swaps two elements at the specified positions.
static boolean[]	tail(boolean[] self)	Returns the items from the boolean array excluding the first item.
static byte[]	tail(byte[] self)	Returns the items from the byte array excluding the first item.
static char[]	tail(char[] self)	Returns the items from the char array excluding the first item.
static double[]	tail(double[] self)	Returns the items from the double array excluding the first item.
static float[]	tail(float[] self)	Returns the items from the float array excluding the first item.
static int[]	tail(int[] self)	Returns the items from the int array excluding the first item.
static long[]	tail(long[] self)	Returns the items from the long array excluding the first item.
static short[]	tail(short[] self)	Returns the items from the short array excluding the first item.
static <T> T[]	tail(T[] self)	Returns the items from the array excluding the first item.
static <T> T[]	take(T[] self, int num)	Returns the first num elements from the head of this array.
static <T> T[]	takeRight(T[] self, int num)	Returns the last num elements from the tail of this array.
static <T> T[]	takeWhile(T[] self, Closure<?> condition)	Returns the longest prefix of this array where each element passed to the given closure evaluates to true.
static List<Boolean>	toList(boolean[] self)	Converts this array to a List of the same size, with each element added to the list.
static List<Byte>	toList(byte[] self)	Converts this array to a List of the same size, with each element added to the list.
static List<Character>	toList(char[] self)	Converts this array to a List of the same size, with each element added to the list.
static List<Double>	toList(double[] self)	Converts this array to a List of the same size, with each element added to the list.
static List<Float>	toList(float[] self)	Converts this array to a List of the same size, with each element added to the list.
static List<Integer>	toList(int[] self)	Converts this array to a List of the same size, with each element added to the list.
static List<Long>	toList(long[] self)	Converts this array to a List of the same size, with each element added to the list.
static List<Short>	toList(short[] self)	Converts this array to a List of the same size, with each element added to the list.
static <T> List<T>	toList(T[] self)	Converts this array to a List of the same size, with each element added to the list.
static Set<Boolean>	toSet(boolean[] self)	Converts this array to a Set, with each unique element added to the set.
static Set<Byte>	toSet(byte[] self)	Converts this array to a Set, with each unique element added to the set.
static Set<Character>	toSet(char[] self)	Converts this array to a Set, with each unique element added to the set.
static Set<Double>	toSet(double[] self)	Converts this array to a Set, with each unique element added to the set.
static Set<Float>	toSet(float[] self)	Converts this array to a Set, with each unique element added to the set.
static Set<Integer>	toSet(int[] self)	Converts this array to a Set, with each unique element added to the set.
static Set<Long>	toSet(long[] self)	Converts this array to a Set, with each unique element added to the set.
static Set<Short>	toSet(short[] self)	Converts this array to a Set, with each unique element added to the set.
static <T> Set<T>	toSet(T[] self)	Converts this array to a Set, with each unique element added to the set.
static <T> T[]	toSorted(T[] self)	Returns a sorted version of the given array using the supplied comparator.
static <T> T[]	toSorted(T[] self, Closure<?> closure)	Sorts the elements from this array into a newly created array using the Closure to determine the correct ordering.
static <T> T[]	toSorted(T[] self, Comparator<? super T> comparator)	Returns a sorted version of the given array using the supplied comparator to determine the resulting order.
static SpreadMap	toSpreadMap(Object[] self)	Creates a spreadable map from this array.
static String	toString(boolean[] self)	Returns the string representation of the given array.
static String	toString(byte[] self)	Returns the string representation of the given array.
static String	toString(char[] self)	Returns the string representation of the given array.
static String	toString(double[] self)	Returns the string representation of the given array.
static String	toString(float[] self)	Returns the string representation of the given array.
static String	toString(int[] self)	Returns the string representation of the given array.
static String	toString(long[] self)	Returns the string representation of the given array.
static String	toString(short[] self)	Returns the string representation of the given array.
static String	toString(Object[] self)	Returns the string representation of the given array.
static <T> T[]	toUnique(T[] self)	Returns a new Array containing the items from the original Array but with duplicates removed using the natural ordering of the items in the array.
static <T> T[]	toUnique(T[] self, Closure<?> closure)	Returns a new Array containing the items from the original Array but with duplicates removed with the supplied closure determining which items are unique.
static <T> T[]	toUnique(T[] self, Comparator<? super T> comparator)	Returns a new Array containing the items from the original Array but with duplicates removed with the supplied comparator determining which items are unique.
static boolean[][]	transpose(boolean[][] self)	A transpose method for 2D boolean arrays.
static byte[][]	transpose(byte[][] self)	A transpose method for 2D byte arrays.
static char[][]	transpose(char[][] self)	A transpose method for 2D char arrays.
static double[][]	transpose(double[][] self)	A transpose method for 2D double arrays.
static float[][]	transpose(float[][] self)	A transpose method for 2D float arrays.
static int[][]	transpose(int[][] self)	A transpose method for 2D int arrays.
static long[][]	transpose(long[][] self)	A transpose method for 2D long arrays.
static short[][]	transpose(short[][] self)	A transpose method for 2D short arrays.
static Object[]	union(Object[] left, Iterable<?> right)	Creates an Object array containing elements from an original array plus those from an Iterable.
static Object[]	union(Object[] left, Object right)	Creates an Object array containing elements from an original array plus an additional appended element.
static Object[]	union(Object[] left, Object[] right)	Creates an Object array as a union of two arrays.
static Object[]	union(Object[] left, Collection<?> right)	Creates an object array containing elements from an original array plus those from a Collection.
static <K, V> Map<K,V>	withCollectedKeys(V[] values, Function<? super V,K> keyTransform)	A variant of withCollectedKeys for arrays.
static <K, V> Map<K,V>	withCollectedKeys(V[] values, Map<K,V> collector, Function<? super V,K> keyTransform)	A variant of withCollectedKeys for arrays.
static <K, V> Map<K,V>	withCollectedValues(K[] keys, Function<? super K,V> valueTransform)	A variant of withCollectedValues for arrays.
static <K, V> Map<K,V>	withCollectedValues(K[] keys, Map<K,V> collector, Function<? super K,V> valueTransform)	A variant of withCollectedValues for arrays.

Methods inherited from class org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport

cloneSimilarCollection, cloneSimilarMap, closeQuietly, closeWithWarning, createSimilarArray, createSimilarCollection, createSimilarCollection, createSimilarCollection, createSimilarList, createSimilarMap, createSimilarOrDefaultCollection, createSimilarQueue, createSimilarSet, normaliseIndex, sameType, sameType, subListBorders, subListBorders, subListRange, writeUTF16BomIfRequired, writeUTF16BomIfRequired, writeUTF16BomIfRequired, writeUTF16BomIfRequired

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

any

public static boolean any(boolean[] self)

Iterates over the contents of a boolean Array, and checks whether any element is true.

 boolean[] array1 = [false, true]
 assert array1.any()
 boolean[] array2 = [false]
 assert !array2.any()
 

Parameters:

self - the boolean array over which we iterate

Returns:

true if any boolean is true

Since:

5.0.0

any

public static boolean any(boolean[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a boolean Array, and checks whether a predicate is valid for at least one element.

 boolean[] array = [true]
 assert array.any{ it }
 assert !array.any{ !it }
 

Parameters:

self - the boolean array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if any iteration for the booleans matches the closure predicate

Since:

5.0.0

any

public static boolean any(byte[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a byte Array, and checks whether a predicate is valid for at least one element.

 byte[] array = [0, 1, 2]
 assert array.any{ it > 1 }
 assert !array.any{ it > 3 }
 

Parameters:

self - the byte array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if any iteration for the bytes matches the closure predicate

Since:

5.0.0

any

public static boolean any(char[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a char Array, and checks whether a predicate is valid for at least one element.

 char[] array = ['a', 'b', 'c']
 assert array.any{ it <= 'a' }
 assert !array.any{ it < 'a' }
 

Parameters:

self - the char array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if any iteration for the chars matches the closure predicate

Since:

5.0.0

any

public static boolean any(short[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a short Array, and checks whether a predicate is valid for at least one element.

 short[] array = [0, 1, 2]
 assert array.any{ it > 1 }
 assert !array.any{ it > 3 }
 

Parameters:

self - the char array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if any iteration for the shorts matches the closure predicate

Since:

5.0.0

any

public static boolean any(int[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of an int Array, and checks whether a predicate is valid for at least one element.

 int[] array = [0, 1, 2]
 assert array.any{ it > 1 }
 assert !array.any{ it > 3 }
 

Parameters:

self - the int array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if any iteration for the ints matches the closure predicate

Since:

5.0.0

any

public static boolean any(long[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a long Array, and checks whether a predicate is valid for at least one element.

 long[] array = [0L, 1L, 2L]
 assert array.any{ it > 1L }
 assert !array.any{ it > 3L }
 

Parameters:

self - the long array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if any iteration for the longs matches the closure predicate

Since:

5.0.0

any

public static boolean any(float[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a float Array, and checks whether a predicate is valid for at least one element.

 float[] array = [0.0f, 1.0f, 2.0f]
 assert array.any{ it > 1.5f }
 assert !array.any{ it > 2.5f }
 

Parameters:

self - the float array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if any iteration for the floats matches the closure predicate

Since:

5.0.0

any

public static boolean any(double[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a double Array, and checks whether a predicate is valid for at least one element.

 double[] array = [0.0d, 1.0d, 2.0d]
 assert array.any{ it > 1.5d }
 assert !array.any{ it > 2.5d }
 

Parameters:

self - the double array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if any iteration for the doubles matches the closure predicate

Since:

5.0.0

any

public static <T> boolean any(T[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of an Array, and checks whether a predicate is valid for at least one element.

Parameters:

self - the array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if any iteration for the object matches the closure predicate

Since:

2.5.0

asBoolean

public static boolean asBoolean(boolean[] self)

Coerces a boolean array to a boolean value. A boolean array is false if the array is of length 0, and true otherwise.

Parameters:

self - an array

Returns:

the array's boolean value

Since:

1.7.4

asBoolean

public static boolean asBoolean(byte[] self)

Coerces a byte array to a boolean value. A byte array is false if the array is null or of length 0, and true otherwise.

 byte[] array1 = []
 assert !array1
 byte[] array2 = [0]
 assert array2
 

Parameters:

self - an array

Returns:

the array's boolean value

Since:

1.7.4

asBoolean

public static boolean asBoolean(char[] self)

Coerces a char array to a boolean value. A char array is false if the array is of length 0, and true otherwise.

Parameters:

self - an array

Returns:

the array's boolean value

Since:

1.7.4

asBoolean

public static boolean asBoolean(short[] self)

Coerces a short array to a boolean value. A short array is false if the array is of length 0, and true otherwise.

Parameters:

self - an array

Returns:

the array's boolean value

Since:

1.7.4

asBoolean

public static boolean asBoolean(int[] self)

Coerces an int array to a boolean value. An int array is false if the array is of length 0, and true otherwise.

Parameters:

self - an array

Returns:

the array's boolean value

Since:

1.7.4

asBoolean

public static boolean asBoolean(long[] self)

Coerces a long array to a boolean value. A long array is false if the array is of length 0, and true otherwise.

Parameters:

self - an array

Returns:

the array's boolean value

Since:

1.7.4

asBoolean

public static boolean asBoolean(float[] self)

Coerces a float array to a boolean value. A float array is false if the array is of length 0, and true otherwise.

Parameters:

self - an array

Returns:

the array's boolean value

Since:

1.7.4

asBoolean

public static boolean asBoolean(double[] self)

Coerces a double array to a boolean value. A double array is false if the array is of length 0, and true otherwise.

Parameters:

self - an array

Returns:

the array's boolean value

Since:

1.7.4

asBoolean

public static boolean asBoolean(Object[] self)

Coerces an object array to a boolean value. An Object array is false if the array is of length 0. and to true otherwise

Parameters:

self - the array

Returns:

the boolean value

Since:

1.7.0

asType

public static <T> T asType(Object[] self,
 Class<T> type)

Converts the given array to either a List, Set, or SortedSet. If the given class is something else, the call is deferred to DefaultGroovyMethods.asType(Object,Class).

Parameters:

self - an array

type - the desired class

Returns:

the object resulting from this type conversion

Since:

1.5.1

average

public static BigDecimal average(byte[] self)

Calculates the average of the bytes in the array.

assert 5.0G == ([2,4,6,8] as byte[]).average()

Parameters:

self - The array of values to calculate the average of

Returns:

The average of the items

Since:

3.0.0

average

public static BigDecimal average(short[] self)

Calculates the average of the shorts in the array.

assert 5.0G == ([2,4,6,8] as short[]).average()

Parameters:

self - The array of values to calculate the average of

Returns:

The average of the items

Since:

3.0.0

average

public static BigDecimal average(int[] self)

Calculates the average of the ints in the array.

assert 5.0G == ([2,4,6,8] as int[]).average()

Parameters:

self - The array of values to calculate the average of

Returns:

The average of the items

Since:

3.0.0

average

public static BigDecimal average(long[] self)

Calculates the average of the longs in the array.

assert 5.0G == ([2,4,6,8] as long[]).average()

Parameters:

self - The array of values to calculate the average of

Returns:

The average of the items

Since:

3.0.0

average

public static double average(float[] self)

Calculates the average of the floats in the array.

assert 5.0d == ([2,4,6,8] as float[]).average()

Parameters:

self - The array of values to calculate the average of

Returns:

The average of the items

Since:

3.0.0

average

public static double average(double[] self)

Calculates the average of the doubles in the array.

assert 5.0d == ([2,4,6,8] as double[]).average()

Parameters:

self - The array of values to calculate the average of

Returns:

The average of the items

Since:

3.0.0

average

public static Object average(Object[] self)

Averages the items in an array. This is equivalent to invoking the "plus" method on all items in the array and then dividing by the total count using the "div" method for the resulting sum.

 assert 3 == ([1, 2, 6] as Integer[]).average()
 

Parameters:

self - The array of values to average

Returns:

The average of all the items

Since:

3.0.0

See Also:

• sum(java.lang.Object[])

average

public static <T> Object average(T[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Averages the result of applying a closure to each item of an array. array.average(closure) is equivalent to: array.collect(closure).average().

 def (nums, strings) = [[1, 3] as Integer[], ['to', 'from'] as String[]]
 assert 20 == nums.average { it * 10 }
 assert 3 == strings.average { it.size() }
 assert 3 == strings.average (String::size)
 

Parameters:

self - An array

closure - a single parameter closure that returns a (typically) numeric value.

Returns:

The average of the values returned by applying the closure to each item of the array.

Since:

3.0.0

chop

public static List<List<Boolean>> chop(boolean[] self,
 int... chopSizes)

Chops the boolean array into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the array isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the array.

 boolean[] array = [false, true, false]
 assert array.chop(1, 2) == [[false], [true, false]]
 

Parameters:

self - a boolean Array to be chopped

chopSizes - the sizes for the returned pieces

Returns:

a list of lists chopping the original array elements into pieces determined by chopSizes

Since:

5.0.0

See Also:

• to chop a list into pieces of a fixed size

chop

public static List<List<Byte>> chop(byte[] self,
 int... chopSizes)

Chops the byte array into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the array isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the array.

 byte[] array = [0, 1, 2]
 assert array.chop(1, 2) == [[0], [1, 2]]
 

Parameters:

self - a byte Array to be chopped

chopSizes - the sizes for the returned pieces

Returns:

a list of lists chopping the original array elements into pieces determined by chopSizes

Since:

5.0.0

See Also:

• to chop a list into pieces of a fixed size

chop

public static List<List<Character>> chop(char[] self,
 int... chopSizes)

Chops the char array into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the array isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the array.

 char[] array = [0, 1, 2]
 assert array.chop(1, 2) == [[0], [1, 2]]
 

Parameters:

self - a char Array to be chopped

chopSizes - the sizes for the returned pieces

Returns:

a list of lists chopping the original array elements into pieces determined by chopSizes

Since:

5.0.0

See Also:

• to chop a list into pieces of a fixed size

chop

public static List<List<Short>> chop(short[] self,
 int... chopSizes)

Chops the short array into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the array isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the array.

 short[] array = [0, 1, 2]
 assert array.chop(1, 2) == [[0], [1, 2]]
 

Parameters:

self - a short Array to be chopped

chopSizes - the sizes for the returned pieces

Returns:

a list of lists chopping the original array elements into pieces determined by chopSizes

Since:

5.0.0

See Also:

• to chop a list into pieces of a fixed size

chop

public static List<List<Integer>> chop(int[] self,
 int... chopSizes)

Chops the int array into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the array isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the array.

 int[] array = [0, 1, 2]
 assert array.chop(1, 2) == [[0], [1, 2]]
 

Parameters:

self - an int Array to be chopped

chopSizes - the sizes for the returned pieces

Returns:

a list of lists chopping the original array elements into pieces determined by chopSizes

Since:

5.0.0

See Also:

• to chop a list into pieces of a fixed size

chop

public static List<List<Long>> chop(long[] self,
 int... chopSizes)

Chops the long array into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the array isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the array.

 long[] array = [0, 1, 2]
 assert array.chop(1, 2) == [[0], [1, 2]]
 

Parameters:

self - a long Array to be chopped

chopSizes - the sizes for the returned pieces

Returns:

a list of lists chopping the original array elements into pieces determined by chopSizes

Since:

5.0.0

See Also:

• to chop a list into pieces of a fixed size

chop

public static List<List<Float>> chop(float[] self,
 int... chopSizes)

Chops the float array into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the array isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the array.

 float[] array = [0, 1, 2]
 assert array.chop(1, 2) == [[0], [1, 2]]
 

Parameters:

self - a float Array to be chopped

chopSizes - the sizes for the returned pieces

Returns:

a list of lists chopping the original array elements into pieces determined by chopSizes

Since:

5.0.0

See Also:

• to chop a list into pieces of a fixed size

chop

public static List<List<Double>> chop(double[] self,
 int... chopSizes)

Chops the double array into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the array isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the array.

 double[] array = [0, 1, 2]
 assert array.chop(1, 2) == [[0], [1, 2]]
 

Parameters:

self - a double Array to be chopped

chopSizes - the sizes for the returned pieces

Returns:

a list of lists chopping the original array elements into pieces determined by chopSizes

Since:

5.0.0

See Also:

• to chop a list into pieces of a fixed size

chop

public static <T> List<List<T>> chop(T[] self,
 int... chopSizes)

Chops the array into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the array isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the array.

Parameters:

self - an Array to be chopped

chopSizes - the sizes for the returned pieces

Returns:

a list of lists chopping the original array elements into pieces determined by chopSizes

Since:

2.5.2

See Also:

• to chop a list into pieces of a fixed size

collate

public static <T> List<List<T>> collate(T[] self,
 int size)

Collates an array.

Parameters:

self - an array

size - the length of each sub-list in the returned list

Returns:

a List containing the array values collated into sub-lists

Since:

2.5.0

See Also:

• DefaultGroovyMethods.collate(Iterable, int)

collate

public static <T> List<List<T>> collate(T[] self,
 int size,
 int step)

Collates an array into sub-lists.

Parameters:

self - an array

size - the length of each sub-list in the returned list

step - the number of elements to step through for each sub-list

Returns:

a List containing the array elements collated into sub-lists

Since:

2.5.0

See Also:

• DefaultGroovyMethods.collate(Iterable, int, int)

collate

public static <T> List<List<T>> collate(T[] self,
 int size,
 boolean keepRemainder)

Collates this array into sub-lists.

Parameters:

self - an array

size - the length of each sub-list in the returned list

keepRemainder - if true, any remaining elements are returned as sub-lists. Otherwise they are discarded

Returns:

a List containing the array elements collated into sub-lists

Since:

2.5.0

See Also:

• DefaultGroovyMethods.collate(Iterable, int, boolean)

collate

public static <T> List<List<T>> collate(T[] self,
 int size,
 int step,
 boolean keepRemainder)

Collates this array into sub-lists.

Parameters:

self - an array

size - the length of each sub-list in the returned list

step - the number of elements to step through for each sub-list

keepRemainder - if true, any remaining elements are returned as sub-lists. Otherwise they are discarded

Returns:

a List containing the array elements collated into sub-lists

Since:

2.5.0

collect

public static <E,
T> List<T> collect(E[] self,
 @ClosureParams(Component.class)
 Closure<T> transform)

Iterates through this Array transforming each item into a new value using the transform closure, returning a list of transformed values.

Parameters:

self - an array

transform - the closure used to transform each item of the Array

Returns:

A list of the transformed values.

Since:

2.5.0

collect

public static <E,
T,
C extends Collection<T>> C collect(E[] self,
 C collector,
 @ClosureParams(Component.class)
 Closure<? extends T> transform)

Iterates through this Array transforming each item into a new value using the transform closure and adding it to the supplied collector.

 Integer[] nums = [1,2,3]
 List answer = []
 nums.collect(answer) { it * 2 }
 assert [2,4,6] == answer
 

Parameters:

self - an array

collector - the Collection to which the transformed values are added

transform - the closure used to transform each item

Returns:

The collector with all transformed values added to it.

Since:

2.5.0

collectEntries

public static <K,
V,
E> Map<K,V> collectEntries(E[] self)

A variant of collectEntries using the identity closure as the transform.

Parameters:

self - an array

Returns:

the collector with all transformed values added to it

Since:

1.8.5

See Also:

• collectEntries(Object[], Closure)

collectEntries

public static <K,
V,
E> Map<K,V> collectEntries(E[] self,
 Map<K,V> collector)

A variant of collectEntries using the identity closure as the transform.

Parameters:

self - an array

collector - the Map into which the transformed entries are put

Returns:

the collector with all transformed values added to it

Since:

1.8.5

See Also:

• collectEntries(Object[], Map, Closure)

collectEntries

public static <K,
V,
E> Map<K,V> collectEntries(E[] self,
 @ClosureParams(Component.class)
 Closure<?> transform)

Iterates through this array transforming each item using the transform closure and returning a map of the resulting transformed entries.

 def letters = "abc"
 def nums = [0, 1, 2] as Integer[]
 // collect letters with index using list style
 assert nums.collectEntries { index -> [index, letters[index]] } == [0:'a', 1:'b', 2:'c']
 // collect letters with index using map style
 assert nums.collectEntries { index -> [(index): letters[index]] } == [0:'a', 1:'b', 2:'c']
 

Note: When using the list-style of result, the behavior is 'def (key, value) = listResultFromClosure'. While we strongly discourage using a list of size other than 2, Groovy's normal semantics apply in this case; throwing away elements after the second one and using null for the key or value for the case of a shortened list.

Parameters:

self - a Collection

transform - the closure used for transforming, which has an item from self as the parameter and should return a Map.Entry, a Map or a two-element list containing the resulting key and value

Returns:

a Map of the transformed entries

Since:

1.7.9

See Also:

• DefaultGroovyMethods.collectEntries(Iterator, Map, Closure)

collectEntries

public static <K,
V,
E> Map<K,V> collectEntries(E[] self,
 Map<K,V> collector,
 @ClosureParams(Component.class)
 Closure<?> transform)

Iterates through this array transforming each item using the transform closure and returning a map of the resulting transformed entries.

 def letters = "abc"
 def nums = [0, 1, 2] as Integer[]
 // collect letters with index
 assert nums.collectEntries( [:] ) { index -> [index, letters[index]] } == [0:'a', 1:'b', 2:'c']
 assert nums.collectEntries( [4:'d'] ) { index ->
     [(index+1): letters[index]] } == [1:'a', 2:'b', 3:'c', 4:'d']
 

Note: When using the list-style of result, the behavior is 'def (key, value) = listResultFromClosure'. While we strongly discourage using a list of size other than 2, Groovy's normal semantics apply in this case; throwing away elements after the second one and using null for the key or value for the case of a shortened list. If your collector Map doesn't support null keys or values, you might get a runtime error, e.g. NullPointerException or IllegalArgumentException.

Parameters:

self - an array

collector - the Map into which the transformed entries are put

transform - the closure used for transforming, which has an item from self as the parameter and should return a Map.Entry, a Map or a two-element list containing the resulting key and value

Returns:

the collector with all transformed values added to it

Since:

1.7.9

See Also:

• DefaultGroovyMethods.collect(Map, Collection, Closure)

collectEntries

public static <K,
V,
E> Map<K,V> collectEntries(E[] self,
 Function<? super E,K> keyTransform,
 Function<? super E,V> valueTransform)

A variant of collectEntries for arrays with separate functions for transforming the keys and values.

 String[] languages = ['Groovy', 'Java', 'Kotlin', 'Scala']
 def firstLetter = s -> s[0]
 assert languages.collectEntries(firstLetter, String::size) == [G:6, J:4, K:6, S:5]
 

Parameters:

self - an array

keyTransform - a function for transforming array elements into keys

valueTransform - a function for transforming array elements into values

Returns:

a Map of the transformed entries

Since:

5.0.0

collectEntries

public static <K,
V,
E> Map<K,V> collectEntries(E[] self,
 Map<K,V> collector,
 Function<? super E,K> keyTransform,
 Function<? super E,V> valueTransform)

A variant of collectEntries for arrays with separate functions for transforming the keys and values. The supplied collector map is used as the destination for transformed entries.

Parameters:

self - an array

collector - the Map into which the transformed entries are put

keyTransform - a function for transforming array elements into keys

valueTransform - a function for transforming array elements into values

Returns:

the collector with all transformed values added to it

Since:

5.0.0

collectMany

public static <T,
E> List<T> collectMany(E[] self,
 @ClosureParams(Component.class)
 Closure<? extends Collection<? extends T>> projection)

Projects each item from a source array to a collection and concatenates (flattens) the resulting collections into a single list.

 def nums = [1, 2, 3, 4, 5, 6] as Object[]
 def squaresAndCubesOfEvens = nums.collectMany{ it % 2 ? [] : [it**2, it**3] }
 assert squaresAndCubesOfEvens == [4, 8, 16, 64, 36, 216]
 

Parameters:

self - an array

projection - a projecting Closure returning a collection of items

Returns:

A list created from the projected collections concatenated (flattened) together.

Since:

1.8.1

collectMany

public static <T,
E,
C extends Collection<T>> C collectMany(E[] self,
 C collector,
 @ClosureParams(Component.class)
 Closure<? extends Collection<? extends T>> projection)

Projects each item from a source array to a collection and concatenates (flattens) the resulting collections into a single list.

 def nums = [1, 2, 3, 4, 5, 6] as Object[]
 def squaresAndCubesOfEvens = nums.collectMany{ it % 2 ? [] : [it**2, it**3] }
 assert squaresAndCubesOfEvens == [4, 8, 16, 64, 36, 216]
 

Parameters:

self - an array

collector - an initial collection to add the projected items to

projection - a projecting Closure returning a collection of items

Returns:

The collector with the projected collections concatenated (flattened) to it.

Since:

1.8.1

contains

public static boolean contains(boolean[] self,
 Object value)

Checks whether the array contains the given value.

Parameters:

self - the array we are searching

value - the value being searched for

Returns:

true if the array contains the value

Since:

1.8.6

contains

public static boolean contains(byte[] self,
 Object value)

Checks whether the array contains the given value.

Parameters:

self - the array we are searching

value - the value being searched for

Returns:

true if the array contains the value

Since:

1.8.6

contains

public static boolean contains(char[] self,
 Object value)

Checks whether the array contains the given value.

Parameters:

self - the array we are searching

value - the value being searched for

Returns:

true if the array contains the value

Since:

1.8.6

contains

public static boolean contains(short[] self,
 Object value)

Checks whether the array contains the given value.

Parameters:

self - the array we are searching

value - the value being searched for

Returns:

true if the array contains the value

Since:

1.8.6

contains

public static boolean contains(int[] self,
 Object value)

Checks whether the array contains the given value.

Parameters:

self - the array we are searching

value - the value being searched for

Returns:

true if the array contains the value

Since:

1.8.6

contains

public static boolean contains(long[] self,
 Object value)

Checks whether the array contains the given value.

Parameters:

self - the array we are searching

value - the value being searched for

Returns:

true if the array contains the value

Since:

1.8.6

contains

public static boolean contains(float[] self,
 Object value)

Checks whether the array contains the given value.

Parameters:

self - the array we are searching

value - the value being searched for

Returns:

true if the array contains the value

Since:

1.8.6

contains

public static boolean contains(double[] self,
 Object value)

Checks whether the array contains the given value.

Parameters:

self - the array we are searching

value - the value being searched for

Returns:

true if the array contains the value

Since:

1.8.6

contains

public static boolean contains(Object[] self,
 Object value)

Checks whether the array contains the given value.

Parameters:

self - the array we are searching

value - the value being searched for

Returns:

true if the array contains the value

Since:

1.8.6

count

public static Number count(boolean[] self,
 Object value)

Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using compareTo(value) == 0).

 boolean[] array = [false, true, true]
 assert array.count(true) == 2
 

Parameters:

self - the array within which we count the number of occurrences

value - the value being searched for

Returns:

the number of occurrences

Since:

1.6.4

See Also:

• DefaultGroovyMethods.count(Iterator, Object)

count

public static Number count(byte[] self,
 Object value)

Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using compareTo(value) == 0).

 byte[] array = [10, 20, 20, 30]
 assert array.count(20) == 2
 

Parameters:

self - the array within which we count the number of occurrences

value - the value being searched for

Returns:

the number of occurrences

Since:

1.6.4

See Also:

• DefaultGroovyMethods.count(Iterator, Object)

count

public static Number count(char[] self,
 Object value)

Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using compareTo(value) == 0).

 char[] array = ['x', 'y', 'z', 'z', 'y']
 assert array.count('y') == 2
 

Parameters:

self - the array within which we count the number of occurrences

value - the value being searched for

Returns:

the number of occurrences

Since:

1.6.4

See Also:

• DefaultGroovyMethods.count(Iterator, Object)

count

public static Number count(short[] self,
 Object value)

Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using compareTo(value) == 0).

 short[] array = [10, 20, 20, 30]
 assert array.count(20) == 2
 

Parameters:

self - the array within which we count the number of occurrences

value - the value being searched for

Returns:

the number of occurrences

Since:

1.6.4

See Also:

• DefaultGroovyMethods.count(Iterator, Object)

count

public static Number count(int[] self,
 Object value)

Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using compareTo(value) == 0).

 int[] array = [10, 20, 20, 30]
 assert array.count(20) == 2
 

Parameters:

self - the array within which we count the number of occurrences

value - the value being searched for

Returns:

the number of occurrences

Since:

1.6.4

See Also:

• DefaultGroovyMethods.count(Iterator, Object)

count

public static Number count(long[] self,
 Object value)

Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using compareTo(value) == 0).

 long[] array = [10L, 20L, 20L, 30L]
 assert array.count(20L) == 2
 

Parameters:

self - the array within which we count the number of occurrences

value - the value being searched for

Returns:

the number of occurrences

Since:

1.6.4

See Also:

• DefaultGroovyMethods.count(Iterator, Object)

count

public static Number count(float[] self,
 Object value)

Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using compareTo(value) == 0).

 float[] array = [10.0f, 20.0f, 20.0f, 30.0f]
 assert array.count(20.0f) == 2
 

Parameters:

self - the array within which we count the number of occurrences

value - the value being searched for

Returns:

the number of occurrences

Since:

1.6.4

See Also:

• DefaultGroovyMethods.count(Iterator, Object)

count

public static Number count(double[] self,
 Object value)

Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using compareTo(value) == 0).

 double[] array = [10.0d, 20.0d, 20.0d, 30.0d]
 assert array.count(20.0d) == 2
 

Parameters:

self - the array within which we count the number of occurrences

value - the value being searched for

Returns:

the number of occurrences

Since:

1.6.4

See Also:

• DefaultGroovyMethods.count(Iterator, Object)

count

public static Number count(Object[] self,
 Object value)

Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using compareTo(value) == 0 or equals(value) ).

Parameters:

self - the array within which we count the number of occurrences

value - the value being searched for

Returns:

the number of occurrences

Since:

1.6.4

count

public static <T> Number count(T[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Counts the number of occurrences which satisfy the given closure from inside this array.

Parameters:

self - the array within which we count the number of occurrences

predicate - a closure condition

Returns:

the number of occurrences

Since:

1.8.0

countBy

public static <K,
E> Map<K,Integer> countBy(E[] self,
 @ClosureParams(Component.class)
 Closure<K> closure)

Sorts all array members into groups determined by the supplied mapping closure and counts the group size. The closure should return the key that each item should be grouped by. The returned Map will have an entry for each distinct key returned from the closure, with each value being the frequency of items occurring for that group.

Example usage:

assert ([1,2,2,2,3] as Object[]).countBy{ it % 2 } == [1:2, 0:3]

Parameters:

self - an array to group and count

closure - a closure mapping items to the frequency keys

Returns:

a new Map grouped by keys with frequency counts

Since:

1.8.0

See Also:

• DefaultGroovyMethods.countBy(Iterator, Closure)

countBy

public static <E> Map<E,Integer> countBy(E[] self)

Creates a multiset-like map of the array members.

Example usage:

 assert [1:2, 2:2, 3:1] == ([1,2,1,2,3] as Object[]).countBy()
 

Parameters:

self - an array to group and count

Returns:

a new Map where the keys are the set of values in the array and the values are the frequency counts

Since:

5.0.0

drop

public static <T> T[] drop(T[] self,
 int num)

Drops the given number of elements from the head of this array if they are available.

 String[] strings = [ 'a', 'b', 'c' ]
 assert strings.drop( 0 ) == [ 'a', 'b', 'c' ] as String[]
 assert strings.drop( 2 ) == [ 'c' ] as String[]
 assert strings.drop( 5 ) == [] as String[]
 

Parameters:

self - the original array

num - the number of elements to drop from this array

Returns:

An array consisting of all elements of this array except the first num ones, or else the empty array, if this array has less than num elements.

Since:

1.8.1

dropRight

public static <T> T[] dropRight(T[] self,
 int num)

Drops the given number of elements from the tail of this array if they are available.

 String[] strings = [ 'a', 'b', 'c' ]
 assert strings.dropRight( 0 ) == [ 'a', 'b', 'c' ] as String[]
 assert strings.dropRight( 2 ) == [ 'a' ] as String[]
 assert strings.dropRight( 5 ) == [] as String[]
 

Parameters:

self - the original array

num - the number of elements to drop from this array

Returns:

An array consisting of all elements of this array except the last num ones, or else the empty array, if this array has less than num elements.

Since:

2.4.0

dropWhile

public static <T> T[] dropWhile(T[] self,
 @ClosureParams(Component.class)
 Closure<?> condition)

Create a suffix of the given array by dropping as many elements as possible from the front of the original array such that calling the given closure condition evaluates to true when passed each of the dropped elements.

 def nums = [ 1, 3, 2 ] as Integer[]
 assert nums.dropWhile{ it <= 3 } == [ ] as Integer[]
 assert nums.dropWhile{ it < 3 } == [ 3, 2 ] as Integer[]
 assert nums.dropWhile{ it != 2 } == [ 2 ] as Integer[]
 assert nums.dropWhile{ it == 0 } == [ 1, 3, 2 ] as Integer[]
 

Parameters:

self - the original array

condition - the closure that must evaluate to true to continue dropping elements

Returns:

The shortest suffix of the given array such that the given closure condition evaluates to true for each element dropped from the front of the array.

Since:

1.8.7

each

@Incubating
public static boolean[] each(boolean[] self,
 Consumer<Boolean> consumer)

Iterates through a boolean[] passing each boolean to the given consumer.

 boolean[] array = [false, true, false]
 String result = ''
 array.each{ result += it.toString()[0] }
 assert result == 'ftf'
 

Parameters:

self - the boolean array over which we iterate

consumer - the consumer for each boolean

Returns:

the self array

Since:

5.0.0

each

@Incubating
public static byte[] each(byte[] self,
 Consumer<Byte> consumer)

Iterates through a byte[] passing each byte to the given consumer.

 byte[] array = [0, 1, 2]
 String result = ''
 array.each{ result += it }
 assert result == '012'
 

Parameters:

self - the byte array over which we iterate

consumer - the consumer for each byte

Returns:

the self array

Since:

5.0.0

each

@Incubating
public static char[] each(char[] self,
 Consumer<Character> consumer)

Iterates through a char[] passing each char to the given consumer.

 char[] array = ['a' as char, 'b' as char, 'c' as char]
 String result = ''
 array.each{ result += it }
 assert result == 'abc'
 

Parameters:

self - the char array over which we iterate

consumer - the consumer for each char

Returns:

the self array

Since:

5.0.0

each

@Incubating
public static short[] each(short[] self,
 Consumer<Short> consumer)

Iterates through a short[] passing each short to the given consumer.

 short[] array = [0, 1, 2]
 String result = ''
 array.each{ result += it }
 assert result == '012'
 

Parameters:

self - the short array over which we iterate

consumer - the consumer for each short

Returns:

the self array

Since:

5.0.0

each

@Incubating
public static int[] each(int[] self,
 IntConsumer consumer)

Iterates through an int[] passing each int to the given consumer.

 int[] array = [0, 1, 2]
 String result = ''
 array.each{ result += it }
 assert result == '012'
 

Parameters:

self - the int array over which we iterate

consumer - the consumer for each int

Returns:

the self array

Since:

5.0.0

each

@Incubating
public static long[] each(long[] self,
 LongConsumer consumer)

Iterates through a long[] passing each long to the given consumer.

 long[] array = [0L, 1L, 2L]
 String result = ''
 array.each{ result += it }
 assert result == '012'
 

Parameters:

self - the long array over which we iterate

consumer - the consumer for each long

Returns:

the self array

Since:

5.0.0

each

@Incubating
public static float[] each(float[] self,
 Consumer<Float> consumer)

Iterates through a float[] passing each float to the given consumer.

 float[] array = [0f, 1f, 2f]
 String result = ''
 array.each{ result += it }
 assert result == '0.01.02.0'
 

Parameters:

self - the float array over which we iterate

consumer - the consumer for each float

Returns:

the self array

Since:

5.0.0

each

@Incubating
public static double[] each(double[] self,
 DoubleConsumer consumer)

Iterates through a double[] passing each double to the given consumer.

 double[] array = [0d, 1d, 2d]
 String result = ''
 array.each{ result += it }
 assert result == '0.01.02.0'
 

Parameters:

self - the double array over which we iterate

consumer - the consumer for each double

Returns:

the self array

Since:

5.0.0

each

public static <T> T[] each(T[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Iterates through an array passing each array entry to the given closure.

 String[] letters = ['a', 'b', 'c']
 String result = ''
 letters.each{ result += it }
 assert result == 'abc'
 

Parameters:

self - the array over which we iterate

closure - the closure applied on each array entry

Returns:

the self array

Since:

2.5.0

eachByte

public static void eachByte(byte[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Traverses through each byte of this byte array.

Parameters:

self - a byte array

closure - a closure

Since:

1.5.5

eachByte

public static void eachByte(Byte[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Traverses through each byte of this Byte array. Alias for each.

Parameters:

self - a Byte array

closure - a closure

Since:

1.5.5

eachWithIndex

public static boolean[] eachWithIndex(boolean[] self,
 @ClosureParams(value=FromString.class,options="Boolean,Integer")
 Closure<?> closure)

Iterates through a boolean[], passing each boolean and the element's index (a counter starting at zero) to the given closure.

 boolean[] array = [false, true, false]
 String result = ''
 array.eachWithIndex{ item, index -> result += "$index($item)" }
 assert result == '0(false)1(true)2(false)'
 

Parameters:

self - a boolean array

closure - a Closure to operate on each boolean

Returns:

the self array

Since:

5.0.0

eachWithIndex

public static byte[] eachWithIndex(byte[] self,
 @ClosureParams(value=FromString.class,options="Byte,Integer")
 Closure<?> closure)

Iterates through a byte[], passing each byte and the element's index (a counter starting at zero) to the given closure.

 byte[] array = [10, 20, 30]
 String result = ''
 array.eachWithIndex{ item, index -> result += "$index($item)" }
 assert result == '0(10)1(20)2(30)'
 

Parameters:

self - a byte array

closure - a Closure to operate on each byte

Returns:

the self array

Since:

5.0.0

eachWithIndex

public static char[] eachWithIndex(char[] self,
 @ClosureParams(value=FromString.class,options="Character,Integer")
 Closure<?> closure)

Iterates through a char[], passing each char and the element's index (a counter starting at zero) to the given closure.

 char[] array = ['a' as char, 'b' as char, 'c' as char]
 String result = ''
 array.eachWithIndex{ item, index -> result += "$index($item)" }
 assert result == '0(a)1(b)2(c)'
 

Parameters:

self - a char array

closure - a Closure to operate on each char

Returns:

the self array

Since:

5.0.0

eachWithIndex

public static short[] eachWithIndex(short[] self,
 @ClosureParams(value=FromString.class,options="Short,Integer")
 Closure<?> closure)

Iterates through a short[], passing each short and the element's index (a counter starting at zero) to the given closure.

 short[] array = [10, 20, 30]
 String result = ''
 array.eachWithIndex{ item, index -> result += "$index($item)" }
 assert result == '0(10)1(20)2(30)'
 

Parameters:

self - a short array

closure - a Closure to operate on each short

Returns:

the self array

Since:

5.0.0

eachWithIndex

public static int[] eachWithIndex(int[] self,
 @ClosureParams(value=FromString.class,options="Integer,Integer")
 Closure<?> closure)

Iterates through an int[], passing each int and the element's index (a counter starting at zero) to the given closure.

 int[] array = [10, 20, 30]
 String result = ''
 array.eachWithIndex{ item, index -> result += "$index($item)" }
 assert result == '0(10)1(20)2(30)'
 

Parameters:

self - an int array

closure - a Closure to operate on each int

Returns:

the self array

Since:

5.0.0

eachWithIndex

public static long[] eachWithIndex(long[] self,
 @ClosureParams(value=FromString.class,options="Long,Integer")
 Closure<?> closure)

Iterates through a long[], passing each long and the element's index (a counter starting at zero) to the given closure.

 long[] array = [10L, 20L, 30L]
 String result = ''
 array.eachWithIndex{ item, index -> result += "$index($item)" }
 assert result == '0(10)1(20)2(30)'
 

Parameters:

self - a long array

closure - a Closure to operate on each long

Returns:

the self array

Since:

5.0.0

eachWithIndex

public static float[] eachWithIndex(float[] self,
 @ClosureParams(value=FromString.class,options="Float,Integer")
 Closure<?> closure)

Iterates through a float[], passing each float and the element's index (a counter starting at zero) to the given closure.

 float[] array = [10f, 20f, 30f]
 String result = ''
 array.eachWithIndex{ item, index -> result += "$index($item)" }
 assert result == '0(10.0)1(20.0)2(30.0)'
 

Parameters:

self - a float array

closure - a Closure to operate on each float

Returns:

the self array

Since:

5.0.0

eachWithIndex

public static double[] eachWithIndex(double[] self,
 @ClosureParams(value=FromString.class,options="Double,Integer")
 Closure<?> closure)

Iterates through a double[], passing each double and the element's index (a counter starting at zero) to the given closure.

 double[] array = [10d, 20d, 30d]
 String result = ''
 array.eachWithIndex{ item, index -> result += "$index($item)" }
 assert result == '0(10.0)1(20.0)2(30.0)'
 

Parameters:

self - a double array

closure - a Closure to operate on each double

Returns:

the self array

Since:

5.0.0

eachWithIndex

public static <T> T[] eachWithIndex(T[] self,
 @ClosureParams(value=FromString.class,options="T,Integer")
 Closure<?> closure)

Iterates through an array, passing each array element and the element's index (a counter starting at zero) to the given closure.

 String[] letters = ['a', 'b', 'c']
 String result = ''
 letters.eachWithIndex{ letter, index -> result += "$index:$letter" }
 assert result == '0:a1:b2:c'
 

Parameters:

self - an array

closure - a Closure to operate on each array entry

Returns:

the self array

Since:

2.5.0

equals

public static boolean equals(boolean[] self,
 boolean[] right)

Compares the contents of this array to the contents of the given array.

Example usage:

 boolean[] array1 = [true, false]
 boolean[] array2 = [true, false]
 assert array1 !== array2
 assert array1.equals(array2)
 

Parameters:

self - a boolean array

right - the array being compared

Returns:

true if the contents of both arrays are equal.

Since:

5.0.0

equals

public static boolean equals(byte[] self,
 byte[] right)

Compares the contents of this array to the contents of the given array.

Example usage:

 byte[] array1 = [4, 8]
 byte[] array2 = [4, 8]
 assert array1 !== array2
 assert array1.equals(array2)
 

Parameters:

self - a byte array

right - the array being compared

Returns:

true if the contents of both arrays are equal.

Since:

5.0.0

equals

public static boolean equals(char[] self,
 char[] right)

Compares the contents of this array to the contents of the given array.

Example usage:

 char[] array1 = ['a', 'b']
 char[] array2 = ['a', 'b']
 assert array1 !== array2
 assert array1.equals(array2)
 

Parameters:

self - a char array

right - the array being compared

Returns:

true if the contents of both arrays are equal.

Since:

5.0.0

equals

public static boolean equals(short[] self,
 short[] right)

Compares the contents of this array to the contents of the given array.

Example usage:

 short[] array1 = [4, 8]
 short[] array2 = [4, 8]
 assert array1 !== array2
 assert array1.equals(array2)
 

Parameters:

self - a short array

right - the array being compared

Returns:

true if the contents of both arrays are equal.

Since:

5.0.0

equals

public static boolean equals(int[] self,
 int[] right)

Compares the contents of this array to the contents of the given array.

Example usage:

 int[] array1 = [4, 8]
 int[] array2 = [4, 8]
 assert array1 !== array2
 assert array1.equals(array2)
 

Parameters:

self - an int array

right - the array being compared

Returns:

true if the contents of both arrays are equal.

Since:

5.0.0

equals

public static boolean equals(long[] self,
 long[] right)

Compares the contents of this array to the contents of the given array.

Example usage:

 long[] array1 = [4L, 8L]
 long[] array2 = [4L, 8L]
 assert array1 !== array2
 assert array1.equals(array2)
 

Parameters:

self - a long array

right - the array being compared

Returns:

true if the contents of both arrays are equal.

Since:

5.0.0

equals

public static boolean equals(float[] self,
 float[] right)

Compares the contents of this array to the contents of the given array.

Example usage:

 float[] array1 = [4.0f, 8.0f]
 float[] array2 = [4.0f, 8.0f]
 assert array1 !== array2
 assert array1.equals(array2)
 

Parameters:

self - a float array

right - the array being compared

Returns:

true if the contents of both arrays are equal.

Since:

5.0.0

equals

public static boolean equals(double[] self,
 double[] right)

Compares the contents of this array to the contents of the given array.

Example usage:

 double[] array1 = [4.0d, 8.0d]
 double[] array2 = [4.0d, 8.0d]
 assert array1 !== array2
 assert array1.equals(array2)
 

Parameters:

self - a double array

right - the array being compared

Returns:

true if the contents of both arrays are equal.

Since:

5.0.0

equals

public static boolean equals(Object[] left,
 List<?> right)

Determines if the contents of this array are equal to the contents of the given list, in the same order. This returns false if either collection is null.

Parameters:

left - an array

right - the List being compared

Returns:

true if the contents of both collections are equal.

Since:

1.5.0

every

public static boolean every(boolean[] self)

Iterates over the contents of a boolean Array, and checks whether every element is true.

 boolean[] array1 = [false, true]
 assert !array1.every()
 boolean[] array2 = [true, true]
 assert array2.every()
 

Parameters:

self - the boolean array over which we iterate

Returns:

true if no boolean is false

Since:

5.0.0

every

public static boolean every(boolean[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a boolean Array, and checks whether a predicate is valid for every element.

 boolean[] array = [true]
 assert array.every{ it }
 assert !array.every{ !it }
 

Parameters:

self - the boolean array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if the predicate returns true for all elements in the array

Since:

5.0.0

every

public static boolean every(byte[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a byte Array, and checks whether a predicate is valid for all elements.

 byte[] array = [0, 1, 2]
 assert array.every{ it < 3 }
 assert !array.every{ it > 1 }
 

Parameters:

self - the byte array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if the predicate returns true for all elements in the array

Since:

5.0.0

every

public static boolean every(char[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a char Array, and checks whether a predicate is valid for all elements.

 char[] array = ['a', 'b', 'c']
 assert array.every{ it <= 'd' }
 assert !array.every{ it > 'b' }
 

Parameters:

self - the char array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if the predicate returns true for all elements in the array

Since:

5.0.0

every

public static boolean every(short[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a short Array, and checks whether a predicate is valid for all elements.

 short[] array = [0, 1, 2]
 assert array.every{ it < 3 }
 assert !array.every{ it > 1 }
 

Parameters:

self - the char array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if the predicate returns true for all elements in the array

Since:

5.0.0

every

public static boolean every(int[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of an int Array, and checks whether a predicate is valid for all elements.

 int[] array = [0, 1, 2]
 assert array.every{ it < 3 }
 assert !array.every{ it > 1 }
 

Parameters:

self - the int array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if the predicate returns true for all elements in the array

Since:

5.0.0

every

public static boolean every(long[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a long Array, and checks whether a predicate is valid for all elements.

 long[] array = [0L, 1L, 2L]
 assert array.every{ it < 3L }
 assert !array.every{ it > 1L }
 

Parameters:

self - the long array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if the predicate returns true for all elements in the array

Since:

5.0.0

every

public static boolean every(float[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a float Array, and checks whether a predicate is valid for all elements.

 float[] array = [0.0f, 1.0f, 2.0f]
 assert array.every{ it < 2.5f }
 assert !array.every{ it > 1.5f }
 

Parameters:

self - the float array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if the predicate returns true for all elements in the array

Since:

5.0.0

every

public static boolean every(double[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Iterates over the contents of a double Array, and checks whether a predicate is valid for all elements.

 double[] array = [0.0d, 1.0d, 2.0d]
 assert array.every{ it < 2.5d }
 assert !array.every{ it > 1.5d }
 

Parameters:

self - the double array over which we iterate

predicate - the closure predicate used for matching

Returns:

true if the predicate returns true for all elements in the array

Since:

5.0.0

every

public static <T> boolean every(T[] self,
 @ClosureParams(Component.class)
 Closure<?> predicate)

Used to determine if the given predicate closure is valid (i.e. returns true for all items in this Array).

Parameters:

self - an array

predicate - the closure predicate used for matching

Returns:

true if the predicate returns true for all elements in the array

Since:

2.5.0

find

public static <T> T find(T[] self,
 @ClosureParams(Component.class)
 Closure<?> condition)

Finds the first element in the array that matches the given closure condition. Example:

 def list = [1,2,3] as Integer[]
 assert 2 == list.find { it > 1 }
 assert null == list.find { it > 5 }
 

Parameters:

self - an array

condition - a closure condition

Returns:

The first element from the array that matches the condition or null if no element matches.

Since:

2.0

findAll

public static <T> List<T> findAll(T[] self)

Finds the elements of the array matching the IDENTITY Closure (i.e. matching Groovy truth).

 def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null] as Object[]
 assert items.findAll() == [1, 2, true, 'foo', [4, 5]]
 

Parameters:

self - an array

Returns:

A list of the truthy values.

Since:

2.0

See Also:

• Closure.IDENTITY

findAll

public static <T> List<T> findAll(T[] self,
 @ClosureParams(Component.class)
 Closure<?> condition)

Finds all elements of the array matching the given Closure condition.

 def items = [1,2,3,4] as Integer[]
 assert [2,4] == items.findAll { it % 2 == 0 }
 

Parameters:

self - an array

condition - a closure condition

Returns:

A list of the matching values.

Since:

2.0

findIndexOf

public static <T> int findIndexOf(T[] self,
 @ClosureParams(Component.class)
 Closure<?> condition)

Iterates over the elements of an array and returns the index of the first item that satisfies the condition specified by the closure.

Parameters:

self - an array

condition - the matching condition

Returns:

The index of the first matched object or -1 if no match was found.

Since:

2.5.0

findIndexOf

public static <T> int findIndexOf(T[] self,
 int startIndex,
 @ClosureParams(Component.class)
 Closure<?> condition)

Iterates over the elements of an array, starting from a specified index, and returns the index of the first item that satisfies the condition specified by the closure.

Parameters:

self - an array

startIndex - start matching from this index

condition - the matching condition

Returns:

The index of the first matched object or -1 if no match was found.

Since:

2.5.0

findIndexValues

public static <T> List<Number> findIndexValues(T[] self,
 @ClosureParams(Component.class)
 Closure<?> condition)

Iterates over the elements of an array and returns the index values of the items that match the condition specified in the closure.

Parameters:

self - an array

condition - the matching condition

Returns:

a list of numbers corresponding to the index values of all matched objects

Since:

2.5.0

findIndexValues

public static <T> List<Number> findIndexValues(T[] self,
 Number startIndex,
 @ClosureParams(Component.class)
 Closure<?> condition)

Iterates over the elements of an array, starting from a specified index, and returns the index values of the items that match the condition specified in the closure.

Parameters:

self - an array

startIndex - start matching from this index

condition - the matching condition

Returns:

a list of numbers corresponding to the index values of all matched objects

Since:

2.5.0

findLastIndexOf

public static <T> int findLastIndexOf(T[] self,
 @ClosureParams(Component.class)
 Closure<?> condition)

Returns the index of the last item that matches the specified condition.

 def array = new Number[]{1, 2, 1, 2, 1}
 assert array.findLastIndexOf{it==1} ==  4
 assert array.findLastIndexOf{it==2} ==  3
 assert array.findLastIndexOf{it==3} == -1
 assert array.findLastIndexOf{it>=0} ==  4
 assert array.findLastIndexOf{it<=0} == -1
 def empty = new Object[0]
 assert empty.findLastIndexOf {true} == -1
 

Parameters:

self - an array

condition - the matching condition

Returns:

The index of the last matched object or -1 if no match was found.

Since:

2.5.0

findLastIndexOf

public static <T> int findLastIndexOf(T[] self,
 int lowerBound,
 @ClosureParams(Component.class)
 Closure<?> condition)

Returns the index of the last item that matches the specified condition that is at or beyond the given index.

 def array = new Number[]{3, 1, 2, 1, 2, 1}
 assert array.findLastIndexOf(1,{it==0}) == -1
 assert array.findLastIndexOf(1,{it==1}) ==  5
 assert array.findLastIndexOf(1,{it==2}) ==  4
 assert array.findLastIndexOf(1,{it==3}) == -1
 assert array.findLastIndexOf(0,{it==3}) ==  0
 def empty = new Object[0]
 assert empty.findLastIndexOf( 2,{true}) == -1
 assert empty.findLastIndexOf(-2,{true}) == -1
 

Parameters:

self - an array

lowerBound - the minimum index

condition - the matching condition

Returns:

The index of the last matched object or -1 if no match was found.

Since:

2.5.0

findResult

public static <T> T findResult(T[] self)

Iterates through the Array stopping once the first non-null result is found and returning that result. If all results are null, null is returned.

Parameters:

self - an array

Returns:

The first non-null result from calling the closure, or null.

Since:

4.0.9

findResult

public static <T,
U extends T,
V extends T> T findResult(U[] self,
 V defaultResult)

Iterates through the Array stopping once the first non-null result is found and returning that result. If all are null, the defaultResult is returned.

Parameters:

self - an Array

defaultResult - an Object that should be returned if all elements are null

Returns:

the first non-null result from calling the closure, or the defaultValue

Since:

4.0.9

findResult

public static <S,
T> T findResult(S[] self,
 @ClosureParams(Component.class)
 Closure<T> condition)

Iterates through the Array calling the given closure condition for each item but stopping once the first non-null result is found and returning that result. If all results are null, null is returned.

Parameters:

self - an array

condition - a closure that returns a non-null value to indicate that processing should stop and the value should be returned

Returns:

The first non-null result from calling the closure, or null.

Since:

2.5.0

findResult

public static <S,
T,
U extends T,
V extends T> T findResult(S[] self,
 U defaultResult,
 @ClosureParams(Component.class)
 Closure<V> condition)

Iterates through the Array calling the given closure condition for each item but stopping once the first non-null result is found and returning that result. If all are null, the defaultResult is returned.

Parameters:

self - an array

defaultResult - a value that should be returned if all closure results are null

condition - a closure that returns a non-null value to indicate that processing should stop and the value should be returned

Returns:

The first non-null result from calling the closure, or the defaultValue.

Since:

2.5.0

findResults

public static <T> Collection<T> findResults(T[] self)

Iterates through the Array collecting any non-null results.

Parameters:

self - an array

Returns:

The list of non-null values.

Since:

4.0.9

findResults

public static <T,
U> Collection<T> findResults(U[] self,
 @ClosureParams(Component.class)
 Closure<T> filteringTransform)

Iterates through the Array transforming items using the supplied closure and collecting any non-null results.

Parameters:

self - an array

filteringTransform - a closure that should return either a non-null transformed value or null for items which should be discarded

Returns:

The list of non-null transformed values.

Since:

2.5.0

first

public static boolean first(boolean[] self)

Returns the first item from the boolean array.

 boolean[] array = [true, false]
 assert array.first() == true
 

An alias for head().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

first

public static byte first(byte[] self)

Returns the first item from the byte array.

 byte[] bytes = [1, 2, 3]
 assert bytes.first() == 1
 

An alias for head().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

first

public static char first(char[] self)

Returns the first item from the char array.

 char[] chars = ['a', 'b', 'c']
 assert chars.first() == 'a'
 

An alias for head().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

first

public static short first(short[] self)

Returns the first item from the short array.

 short[] shorts = [10, 20, 30]
 assert shorts.first() == 10
 

An alias for head().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

first

public static int first(int[] self)

Returns the first item from the int array.

 int[] ints = [1, 3, 5]
 assert ints.first() == 1
 

An alias for head().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

first

public static long first(long[] self)

Returns the first item from the long array.

 long[] longs = [2L, 4L, 6L]
 assert longs.first() == 2L
 

An alias for head().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

first

public static float first(float[] self)

Returns the first item from the float array.

 float[] floats = [2.0f, 4.0f, 6.0f]
 assert floats.first() == 2.0f
 

An alias for head().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

first

public static double first(double[] self)

Returns the first item from the double array.

 double[] doubles = [10.0d, 20.0d, 30.0d]
 assert doubles.first() == 10.0d
 

An alias for head().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

first

public static <T> T first(T[] self)

Returns the first item from the array.

 def array = [3, 4, 2].toArray()
 assert array.first() == 3
 

Parameters:

self - an array

Returns:

the first item from the array

Throws:

NoSuchElementException - if the array is empty

Since:

1.7.3

flatten

public static List<Boolean> flatten(boolean[] self)

Flattens an array. This array is added to a new collection. It is an alias for toList() but allows algorithms to be written which also work on multidimensional arrays or non-arrays where flattening would be applicable.

 boolean[] array = [false, true]
 assert array.flatten() == [false, true]
 

Parameters:

self - a boolean Array

Returns:

a Collection of the array elements

Since:

1.6.0

flatten

public static List<Byte> flatten(byte[] self)

Flattens an array. This array is added to a new collection. It is an alias for toList() but allows algorithms to be written which also work on multidimensional arrays or non-arrays where flattening would be applicable.

 byte[] array = [0, 1]
 assert array.flatten() == [0, 1]
 

Parameters:

self - a byte Array

Returns:

a Collection of the array elements

Since:

1.6.0

flatten

public static List<Character> flatten(char[] self)

Flattens an array. This array is added to a new collection. It is an alias for toList() but allows algorithms to be written which also work on multidimensional arrays or non-arrays where flattening would be applicable.

 char[] array = 'ab'.chars
 assert array.flatten() == ['a', 'b']
 

Parameters:

self - a char Array

Returns:

a Collection of the array elements

Since:

1.6.0

flatten

public static List<Short> flatten(short[] self)

Flattens an array. This array is added to a new collection. It is an alias for toList() but allows algorithms to be written which also work on multidimensional arrays or non-arrays where flattening would be applicable.

 short[] array = [0, 1]
 assert array.flatten() == [0, 1]
 

Parameters:

self - a short Array

Returns:

a Collection of the array elements

Since:

1.6.0

flatten

public static List<Integer> flatten(int[] self)

Flattens an array. This array is added to a new collection. It is an alias for toList() but allows algorithms to be written which also work on multidimensional arrays or non-arrays where flattening would be applicable.

 int[] array = [0, 1]
 assert array.flatten() == [0, 1]
 

Parameters:

self - an int Array

Returns:

a Collection of the array elements

Since:

1.6.0

flatten

public static List<Long> flatten(long[] self)

Flattens an array. This array is added to a new collection. It is an alias for toList() but allows algorithms to be written which also work on multidimensional arrays or non-arrays where flattening would be applicable.

 long[] array = [0L, 1L]
 assert array.flatten() == [0L, 1L]
 

Parameters:

self - a long Array to flatten

Returns:

a Collection of the array elements

Since:

1.6.0

flatten

public static List<Float> flatten(float[] self)

Flattens an array. This array is added to a new collection. It is an alias for toList() but allows algorithms to be written which also work on multidimensional arrays or non-arrays where flattening would be applicable.

 float[] array = [0.0f, 1.0f]
 assert array.flatten() == [0.0f, 1.0f]
 

Parameters:

self - a float Array to flatten

Returns:

a Collection of the array elements

Since:

1.6.0

flatten

public static List<Double> flatten(double[] self)

Flattens an array. This array is added to a new collection. It is an alias for toList() but allows algorithms to be written which also work on multidimensional arrays or non-arrays where flattening would be applicable.

 double[] array = [0.0d, 1.0d]
 assert array.flatten() == [0.0d, 1.0d]
 

Parameters:

self - a double Array to flatten

Returns:

a Collection of the array elements

Since:

1.6.0

flatten

public static List<Object> flatten(Object[] self)

Flattens an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.

Parameters:

self - an Array to flatten

Returns:

S flattened Collection

Since:

1.6.0

flatten

public static List<Boolean> flatten(boolean[][] self)

Flattens a 2D array into a new collection. The items are copied row by row.

Example usage:

 boolean[][] array = [[true, false], [true, false]]
 assert array.flatten() == [true, false, true, false]
 

Parameters:

self - a 2D boolean Array

Returns:

a Collection of the array elements

Since:

5.0.0

flatten

public static List<Byte> flatten(byte[][] self)

Flattens a 2D array into a new collection. The items are copied row by row.

Example usage:

 byte[][] array = [[0, 1], [2, 3]]
 assert array.flatten() == [0, 1, 2, 3]
 

Parameters:

self - a 2D byte Array

Returns:

a Collection of the array elements

Since:

5.0.0

flatten

public static List<Character> flatten(char[][] self)

Flattens a 2D array into a new collection. The items are copied row by row.

Example usage:

 char[][] array = ['ab'.chars, 'cd'.chars]
 assert array.flatten() == ['a', 'b', 'c', 'd']
 

Parameters:

self - a 2D char Array

Returns:

a Collection of the array elements

Since:

5.0.0

flatten

public static List<Short> flatten(short[][] self)

Flattens a 2D array into a new collection. The items are copied row by row.

Example usage:

 short[][] array = [[0, 1], [2, 3]]
 assert array.flatten() == [0, 1, 2, 3]
 

Parameters:

self - a 2D short Array

Returns:

a Collection of the array elements

Since:

5.0.0

flatten

public static List<Integer> flatten(int[][] self)

Flattens a 2D array into a new collection. The items are copied row by row.

Example usage:

 int[][] array = [[0, 1], [2, 3]]
 assert array.flatten() == [0, 1, 2, 3]
 

Parameters:

self - a 2D int Array

Returns:

a Collection of the array elements

Since:

5.0.0

flatten

public static List<Long> flatten(long[][] self)

Flattens a 2D array into a new collection. The items are copied row by row.

Example usage:

 long[][] array = [[0, 1], [2, 3]]
 assert array.flatten() == [0, 1, 2, 3]
 

Parameters:

self - a 2D long Array

Returns:

a Collection of the array elements

Since:

5.0.0

flatten

public static List<Float> flatten(float[][] self)

Flattens a 2D array into a new collection. The items are copied row by row.

Example usage:

 float[][] array = [[0.0f, 1.0f], [2.0f, 3.0f]]
 assert array.flatten() == [0.0f, 1.0f, 2.0f, 3.0f]
 

Parameters:

self - a 2D float Array

Returns:

a Collection of the array elements

Since:

5.0.0

flatten

public static List<Double> flatten(double[][] self)

Flattens a 2D array into a new collection. The items are copied row by row.

Example usage:

 double[][] array = [[0.0f, 1.0f], [2.0f, 3.0f]]
 assert array.flatten() == [0.0f, 1.0f, 2.0f, 3.0f]
 

Parameters:

self - a 2D double Array

Returns:

a Collection of the array elements

Since:

5.0.0

flattenMany

public static Collection flattenMany(Object[] self,
 Closure<?> transform)

Flatten an array. This array and any nested arrays, collections or optionals have their contents (recursively) added to a new collection. A transform is applied to any leaf nodes before further flattening.

Parameters:

self - an array

transform - a transform applied to any leaf elements

Returns:

a flattened Collection

Since:

5.0.0

getAt

public static List<Boolean> getAt(boolean[] array,
 Range<?> range)

Supports the subscript operator for a boolean array with a range giving the desired indices.

 boolean[] array = [false, true, false, true, false, true]
 assert array[2..<2] == [] // EmptyRange
 assert array[(0..5.5).step(2)] == [false, false, false] // NumberRange
 assert array[(1..5.5).step(2)] == [true, true, true]    // NumberRange
 

Parameters:

array - a boolean array

range - a range indicating the indices for the items to retrieve

Returns:

list of the retrieved booleans

Since:

1.0

getAt

public static List<Byte> getAt(byte[] array,
 Range<?> range)

Supports the subscript operator for a byte array with a range giving the desired indices.

 byte[] array = [1, 3, 5, 7, 9, 11]
 assert array[2..<2] == [] // EmptyRange
 assert array[(0..5.5).step(2)] == [1, 5, 9]   // NumberRange
 assert array[(1..5.5).step(2)] == [3, 7, 11]  // NumberRange
 

Parameters:

array - a byte array

range - a range indicating the indices for the items to retrieve

Returns:

list of the retrieved bytes

Since:

1.0

getAt

public static List<Character> getAt(char[] array,
 Range<?> range)

Supports the subscript operator for a char array with a range giving the desired indices.

 char[] array = 'abcdef'.chars
 assert array[2..<2] == [] // EmptyRange
 assert array[(0..5.5).step(2)] == ['a', 'c', 'e']  // NumberRange
 assert array[(1..5.5).step(2)] == ['b', 'd', 'f']  // NumberRange
 

Parameters:

array - a char array

range - a range indicating the indices for the items to retrieve

Returns:

list of the retrieved chars

Since:

1.5.0

getAt

public static List<Short> getAt(short[] array,
 Range<?> range)

Supports the subscript operator for a short array with a range giving the desired indices.

 short[] array = [1, 3, 5, 7, 9, 11]
 assert array[2..<2] == [] // EmptyRange
 assert array[(0..5.5).step(2)] == [1, 5, 9]   // NumberRange
 assert array[(1..5.5).step(2)] == [3, 7, 11]  // NumberRange
 

Parameters:

array - a short array

range - a range indicating the indices for the items to retrieve

Returns:

list of the retrieved shorts

Since:

1.0

getAt

public static List<Integer> getAt(int[] array,
 Range<?> range)

Supports the subscript operator for an int array with a range giving the desired indices.

 int[] array = [1, 3, 5, 7, 9, 11]
 assert array[2..<2] == [] // EmptyRange
 assert array[(0..5.5).step(2)] == [1, 5, 9]   // NumberRange
 assert array[(1..5.5).step(2)] == [3, 7, 11]  // NumberRange
 

Parameters:

array - an int array

range - a range indicating the indices for the items to retrieve

Returns:

list of the ints at the given indices

Since:

1.0

getAt

public static List<Long> getAt(long[] array,
 Range<?> range)

Supports the subscript operator for a long array with a range giving the desired indices.

 long[] array = [1L, 3L, 5L, 7L, 9L, 11L]
 assert array[2..<2] == [] // EmptyRange
 assert array[(0..5.5).step(2)] == [1L, 5L, 9L]   // NumberRange
 assert array[(1..5.5).step(2)] == [3L, 7L, 11L]  // NumberRange
 

Parameters:

array - a long array

range - a range indicating the indices for the items to retrieve

Returns:

list of the retrieved longs

Since:

1.0

getAt

public static List<Float> getAt(float[] array,
 Range<?> range)

Supports the subscript operator for a float array with a range giving the desired indices.

 float[] array = [1.0f, 3.0f, 5.0f, 7.0f, 9.0f, 11.0f]
 assert array[2..<2] == [] // EmptyRange
 assert array[(0..5.5).step(2)] == [1.0f, 5.0f, 9.0f]   // NumberRange
 assert array[(1..5.5).step(2)] == [3.0f, 7.0f, 11.0f]  // NumberRange
 

Parameters:

array - a float array

range - a range indicating the indices for the items to retrieve

Returns:

list of the retrieved floats

Since:

1.0

getAt

public static List<Double> getAt(double[] array,
 Range<?> range)

Supports the subscript operator for a double array with a range giving the desired indices.

 double[] array = [1.0d, 3.0d, 5.0d, 7.0d, 9.0d, 11.0d]
 assert array[2..<2] == [] // EmptyRange
 assert array[(0..5.5).step(2)] == [1.0d, 5.0d, 9.0d]   // NumberRange
 assert array[(1..5.5).step(2)] == [3.0d, 7.0d, 11.0d]  // NumberRange
 

Parameters:

array - a double array

range - a range indicating the indices for the items to retrieve

Returns:

list of the retrieved doubles

Since:

1.0

getAt

public static <T> List<T> getAt(T[] array,
 Range<?> range)

Supports the subscript operator for an object array with a range giving the desired indices.

Parameters:

array - an Array of Objects

range - a Range

Returns:

a range of a list from the range's from index up to but not including the range's to value

Since:

1.0

getAt

public static List<Boolean> getAt(boolean[] array,
 IntRange range)

Supports the subscript operator for a boolean array with an IntRange giving the desired indices.

 boolean[] array = [false, false, true, true, false]
 assert array[2..3] == [true, true]
 assert array[-2..-1] == [true, false]
 assert array[-1..-2] == [false, true]
 

Parameters:

array - a boolean array

range - an IntRange indicating the indices for the items to retrieve

Returns:

list of the retrieved booleans

Since:

1.0

getAt

public static List<Byte> getAt(byte[] array,
 IntRange range)

Supports the subscript operator for a byte array with an IntRange giving the desired indices.

 byte[] array = [0, 10, 20, 30, 40]
 assert array[2..3] == [20, 30]
 assert array[-2..-1] == [30, 40]
 assert array[-1..-2] == [40, 30]
 

Parameters:

array - a byte array

range - an IntRange indicating the indices for the items to retrieve

Returns:

list of the retrieved bytes

Since:

1.0

getAt

public static List<Character> getAt(char[] array,
 IntRange range)

Supports the subscript operator for a char array with an IntRange giving the desired indices.

 char[] array = 'abcdef'.chars
 assert array[2..3] == ['c', 'd']
 assert array[-2..-1] == ['e', 'f']
 assert array[-1..-2] == ['f', 'e']
 

Parameters:

array - a char array

range - an IntRange indicating the indices for the items to retrieve

Returns:

list of the retrieved chars

Since:

1.0

getAt

public static List<Short> getAt(short[] array,
 IntRange range)

Supports the subscript operator for a short array with an IntRange giving the desired indices.

 short[] array = [0, 10, 20, 30, 40]
 assert array[2..3] == [20, 30]
 assert array[-2..-1] == [30, 40]
 assert array[-1..-2] == [40, 30]
 

Parameters:

array - a short array

range - an IntRange indicating the indices for the items to retrieve

Returns:

list of the retrieved shorts

Since:

1.0

getAt

public static List<Integer> getAt(int[] array,
 IntRange range)

Supports the subscript operator for an int array with an IntRange giving the desired indices.

 int[] array = [0, 10, 20, 30, 40]
 assert array[2..3] == [20, 30]
 assert array[-2..-1] == [30, 40]
 assert array[-1..-2] == [40, 30]
 

Parameters:

array - an int array

range - an IntRange indicating the indices for the items to retrieve

Returns:

list of the retrieved ints

Since:

1.0

getAt

public static List<Long> getAt(long[] array,
 IntRange range)

Supports the subscript operator for a long array with an IntRange giving the desired indices.

 long[] array = [0L, 10L, 20L, 30L, 40L]
 assert array[2..3] == [20L, 30L]
 assert array[-2..-1] == [30L, 40L]
 assert array[-1..-2] == [40L, 30L]
 

Parameters:

array - a long array

range - an IntRange indicating the indices for the items to retrieve

Returns:

list of the retrieved longs

Since:

1.0

getAt

public static List<Float> getAt(float[] array,
 IntRange range)

Supports the subscript operator for a float array with an IntRange giving the desired indices.

 float[] array = [0.0f, 10.0f, 20.0f, 30.0f, 40.0f]
 assert array[2..3] == [20.0f, 30.0f]
 assert array[-2..-1] == [30.0f, 40.0f]
 assert array[-1..-2] == [40.0f, 30.0f]
 

Parameters:

array - a float array

range - an IntRange indicating the indices for the items to retrieve

Returns:

list of the retrieved floats

Since:

1.0

getAt

public static List<Double> getAt(double[] array,
 IntRange range)

Supports the subscript operator for a double array with an IntRange giving the desired indices.

 double[] array = [0.0d, 10.0d, 20.0d, 30.0d, 40.0d]
 assert array[2..3] == [20.0d, 30.0d]
 assert array[-2..-1] == [30.0d, 40.0d]
 assert array[-1..-2] == [40.0d, 30.0d]
 

Parameters:

array - a double array

range - an IntRange indicating the indices for the items to retrieve

Returns:

list of the retrieved doubles

Since:

1.0

getAt

public static <T> List<T> getAt(T[] array,
 IntRange range)

Supports the subscript operator for an object array with an IntRange giving the desired indices.

Parameters:

array - an object array

range - an IntRange

Returns:

a range of a list from the range's from index up to but not including the range's to value

Since:

1.0

getAt

public static List<Boolean> getAt(boolean[] array,
 ObjectRange range)

Supports the subscript operator for a boolean array with an ObjectRange giving the desired indices.

 boolean[] array = [false, false, true, true, false]
 def range = new ObjectRange(2, 3)
 assert array[range] == [true, true]
 

Parameters:

array - a boolean array

range - an ObjectRange indicating the indices for the items to retrieve

Returns:

list of the retrieved bytes

Since:

1.0

getAt

public static List<Byte> getAt(byte[] array,
 ObjectRange range)

Supports the subscript operator for a byte array with an ObjectRange giving the desired indices.

 byte[] array = [0, 10, 20, 30, 40]
 def range = new ObjectRange(2, 3)
 assert array[range] == [20, 30]
 

Parameters:

array - a byte array

range - an ObjectRange indicating the indices for the items to retrieve

Returns:

list of the retrieved bytes

Since:

1.0

getAt

public static List<Character> getAt(char[] array,
 ObjectRange range)

Supports the subscript operator for a boolean array with an ObjectRange giving the desired indices.

 char[] array = 'abcdef'.chars
 def range = new ObjectRange(2, 3)
 assert array[range] == ['c', 'd']
 

Parameters:

array - a char array

range - an ObjectRange indicating the indices for the items to retrieve

Returns:

list of the retrieved chars

Since:

1.0

getAt

public static List<Short> getAt(short[] array,
 ObjectRange range)

Supports the subscript operator for a short array with an ObjectRange giving the desired indices.

 short[] array = [0, 10, 20, 30, 40]
 def range = new ObjectRange(2, 3)
 assert array[range] == [20, 30]
 

Parameters:

array - a short array

range - an ObjectRange indicating the indices for the items to retrieve

Returns:

list of the retrieved shorts

Since:

1.0

getAt

public static List<Integer> getAt(int[] array,
 ObjectRange range)

Supports the subscript operator for an int array with an ObjectRange giving the desired indices.

 int[] array = [0, 10, 20, 30, 40]
 def range = new ObjectRange(2, 3)
 assert array[range] == [20, 30]
 

Parameters:

array - an int array

range - an ObjectRange indicating the indices for the items to retrieve

Returns:

list of the retrieved ints

Since:

1.0

getAt

public static List<Long> getAt(long[] array,
 ObjectRange range)

Supports the subscript operator for a long array with an ObjectRange giving the desired indices.

 long[] array = [0L, 10L, 20L, 30L, 40L]
 def range = new ObjectRange(2, 3)
 assert array[range] == [20L, 30L]
 

Parameters:

array - a long array

range - an ObjectRange indicating the indices for the items to retrieve

Returns:

list of the retrieved longs

Since:

1.0

getAt

public static List<Float> getAt(float[] array,
 ObjectRange range)

Supports the subscript operator for a float array with an ObjectRange giving the desired indices.

 float[] array = [0.0f, 10.0f, 20.0f, 30.0f, 40.0f]
 def range = new ObjectRange(2, 3)
 assert array[range] == [20.0f, 30.0f]
 

Parameters:

array - a float array

range - an ObjectRange indicating the indices for the items to retrieve

Returns:

list of the retrieved floats

Since:

1.0

getAt

public static List<Double> getAt(double[] array,
 ObjectRange range)

Supports the subscript operator for a double array with an ObjectRange giving the desired indices.

 double[] array = [0.0d, 10.0d, 20.0d, 30.0d, 40.0d]
 def range = new ObjectRange(2, 3)
 assert array[range] == [20.0d, 30.0d]
 

Parameters:

array - a double array

range - an ObjectRange indicating the indices for the items to retrieve

Returns:

list of the retrieved doubles

Since:

1.0

getAt

public static <T> List<T> getAt(T[] array,
 ObjectRange range)

Supports the subscript operator for an object array with an ObjectRange giving the desired indices.

Parameters:

array - an Array of Objects

range - an ObjectRange

Returns:

a range of a list from the range's from index up to but not including the range's to value

Since:

1.0

getAt

public static <T> List<T> getAt(T[] array,
 EmptyRange<?> range)

Supports the subscript operator for an object array with an EmptyRange.

Parameters:

array - an Array of Objects

range - an EmptyRange

Returns:

an empty Range

Since:

1.5.0

getAt

public static List<Boolean> getAt(boolean[] array,
 Collection<?> indices)

Supports the subscript operator for a boolean array with a (potentially nested) collection giving the desired indices.

 boolean[] array = [false, false, true, true, false]
 assert array[2, 3] == [true, true]
 assert array[0, 0..1, [1, [-1]]] == [false, false, false, false, false]
 

Parameters:

array - a boolean array

indices - a collection of indices for the items to retrieve

Returns:

list of the booleans at the given indices

Since:

1.0

getAt

public static List<Byte> getAt(byte[] array,
 Collection<?> indices)

Supports the subscript operator for a byte array with a (potentially nested) collection giving the desired indices.

 byte[] array = [0, 2, 4, 6, 8]
 assert array[2, 3] == [4, 6]
 assert array[1, 0..1, [0, [-1]]] == [2, 0, 2, 0, 8]
 

Parameters:

array - a byte array

indices - a collection of indices for the items to retrieve

Returns:

list of the bytes at the given indices

Since:

1.0

getAt

public static List<Character> getAt(char[] array,
 Collection<?> indices)

Supports the subscript operator for a char array with a (potentially nested) collection giving the desired indices.

 char[] array = 'abcde'.chars
 assert array[2, 3] == ['c', 'd']
 assert array[1, 0..1, [0, [-1]]] == ['b', 'a', 'b', 'a', 'e']
 

Parameters:

array - a char array

indices - a collection of indices for the items to retrieve

Returns:

list of the chars at the given indices

Since:

1.0

getAt

public static List<Short> getAt(short[] array,
 Collection<?> indices)

Supports the subscript operator for a short array with a (potentially nested) collection giving the desired indices.

 short[] array = [0, 2, 4, 6, 8]
 assert array[2, 3] == [4, 6]
 assert array[1, 0..1, [0, [-1]]] == [2, 0, 2, 0, 8]
 

Parameters:

array - a short array

indices - a collection of indices for the items to retrieve

Returns:

list of the shorts at the given indices

Since:

1.0

getAt

public static List<Integer> getAt(int[] array,
 Collection<?> indices)

Supports the subscript operator for an int array with a (potentially nested) collection giving the desired indices.

 int[] array = [0, 2, 4, 6, 8]
 assert array[2, 3] == [4, 6]
 assert array[1, 0..1, [0, [-1]]] == [2, 0, 2, 0, 8]
 

Parameters:

array - an int array

indices - a collection of indices for the items to retrieve

Returns:

list of the ints at the given indices

Since:

1.0

getAt

public static List<Long> getAt(long[] array,
 Collection<?> indices)

Supports the subscript operator for a long array with a (potentially nested) collection giving the desired indices.

 long[] array = [0L, 2L, 4L, 6L, 8L]
 assert array[2, 3] == [4L, 6L]
 assert array[1, 0..1, [0, [-1]]] == [2L, 0L, 2L, 0L, 8L]
 

Parameters:

array - a long array

indices - a collection of indices for the items to retrieve

Returns:

list of the longs at the given indices

Since:

1.0

getAt

public static List<Float> getAt(float[] array,
 Collection<?> indices)

Supports the subscript operator for a float array with a (potentially nested) collection giving the desired indices.

 float[] array = [0.0f, 2.0f, 4.0f, 6.0f, 8.0f]
 assert array[2, 3] == [4.0f, 6.0f]
 assert array[1, 0..1, [0, [-1]]] == [2.0f, 0.0f, 2.0f, 0.0f, 8.0f]
 

Parameters:

array - a float array

indices - a collection of indices for the items to retrieve

Returns:

list of the floats at the given indices

Since:

1.0

getAt

public static List<Double> getAt(double[] array,
 Collection<?> indices)

Supports the subscript operator for a double array with a (potentially nested) collection giving the desired indices.

 double[] array = [0.0d, 2.0d, 4.0d, 6.0d, 8.0d]
 assert array[2, 3] == [4.0d, 6.0d]
 assert array[1, 0..1, [0, [-1]]] == [2.0d, 0.0d, 2.0d, 0.0d, 8.0d]
 

Parameters:

array - a double array

indices - a collection of indices for the items to retrieve

Returns:

list of the doubles at the given indices

Since:

1.0

getAt

public static <T> List<T> getAt(T[] array,
 Collection<?> indices)

Selects a List of items from an array using a Collection to identify the indices to be selected.

Parameters:

array - an object array

indices - a collection of indices

Returns:

a new list of the values at the given indices

Since:

1.0

getIndices

public static IntRange getIndices(boolean[] self)

Returns indices of the boolean array.

 boolean[] array = [false, true]
 assert array.indices == 0..1
 

Since:

3.0.8

See Also:

• DefaultGroovyMethods.getIndices(Object[])

getIndices

public static IntRange getIndices(byte[] self)

Returns indices of the byte array.

 byte[] array = [0, 1]
 assert array.indices == 0..1
 

Since:

3.0.8

See Also:

• DefaultGroovyMethods.getIndices(Object[])

getIndices

public static IntRange getIndices(char[] self)

Returns indices of the char array.

 char[] array = 'ab'.chars
 assert array.indices == 0..1
 

Since:

3.0.8

See Also:

• DefaultGroovyMethods.getIndices(Object[])

getIndices

public static IntRange getIndices(short[] self)

Returns indices of the short array.

 short[] array = [0, 1]
 assert array.indices == 0..1
 

Since:

3.0.8

See Also:

• DefaultGroovyMethods.getIndices(Object[])

getIndices

public static IntRange getIndices(int[] self)

Returns indices of the int array.

 int[] array = [0, 1]
 assert array.indices == 0..1
 

Since:

3.0.8

See Also:

• DefaultGroovyMethods.getIndices(Object[])

getIndices

public static IntRange getIndices(long[] self)

Returns indices of the long array.

 long[] array = [0L, 1L]
 assert array.indices == 0..1
 

Since:

3.0.8

See Also:

• DefaultGroovyMethods.getIndices(Object[])

getIndices

public static IntRange getIndices(float[] self)

Returns indices of the float array.

 float[] array = [0.0f, 1.0f]
 assert array.indices == 0..1
 

Since:

3.0.8

See Also:

• DefaultGroovyMethods.getIndices(Object[])

getIndices

public static IntRange getIndices(double[] self)

Returns indices of the double array.

 double[] array = [0.0d, 1.0d]
 assert array.indices == 0..1
 

Since:

3.0.8

See Also:

• DefaultGroovyMethods.getIndices(Object[])

getIndices

public static <T> IntRange getIndices(T[] self)

Returns indices of the array.

Example:

 String[] letters = ['a', 'b', 'c', 'd']
 assert 0..<4 == letters.indices
 

Parameters:

self - an array

Returns:

an index range

Since:

2.4.0

grep

public static <T> List<T> grep(T[] self)

Iterates over the array returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.

Example:

 def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null] as Object[]
 assert items.grep() == [1, 2, true, 'foo', [4, 5]]
 

Parameters:

self - an array

Returns:

a list of elements which satisfy Groovy truth

Since:

2.0

See Also:

• Closure.IDENTITY

grep

public static <T> List<T> grep(T[] self,
 Object filter)

Iterates over the array of items and returns a collection of items that match the given filter - calling the DefaultGroovyMethods.isCase(Object,Object) method used by switch statements. This method can be used with different kinds of filters like regular expressions, classes, ranges etc. Example:

 def items = ['a', 'b', 'aa', 'bc', 3, 4.5] as Object[]
 assert items.grep( ~/a+/ )  == ['a', 'aa']
 assert items.grep( ~/../ )  == ['aa', 'bc']
 assert items.grep( Number ) == [ 3, 4.5 ]
 assert items.grep{ it.toString().size() == 1 } == [ 'a', 'b', 3 ]
 

Parameters:

self - an array

filter - the filter to perform on each element of the array (using the DefaultGroovyMethods.isCase(java.lang.Object, java.lang.Object) method)

Returns:

a list of objects which match the filter

Since:

2.0

groupBy

public static <K,
T> Map<K,List<T>> groupBy(T[] self,
 @ClosureParams(Component.class)
 Closure<K> closure)

Sorts all array members into groups determined by the supplied mapping closure. The closure should return the key that this item should be grouped by. The returned LinkedHashMap will have an entry for each distinct key returned from the closure, with each value being a list of items for that group.

Example usage:

 Integer[] items = [1,2,3,4,5,6]
 assert [0:[2,4,6], 1:[1,3,5]] == items.groupBy { it % 2 }
 

Parameters:

self - an array to group

closure - a closure mapping entries on keys

Returns:

A map grouped by keys.

Since:

2.2.0

groupBy

public static Map groupBy(Object[] self,
 Object... closures)

Sorts all array members into (sub)groups determined by the supplied mapping closures as per the Iterable variant of this method.

Parameters:

self - an array to group

closures - an array of closures, each mapping entries on keys

Returns:

A map grouped by keys on each criterion.

Since:

2.2.0

groupBy

public static Map groupBy(Object[] self,
 List<Closure<?>> closures)

Sorts all array members into (sub)groups determined by the supplied mapping closures as per the list variant of this method.

Parameters:

self - an array to group

closures - a list of closures, each mapping entries on keys

Returns:

A map grouped by keys on each criterion.

Since:

2.2.0

head

public static boolean head(boolean[] self)

Returns the first item from the boolean array.

 boolean[] array = [true, false]
 assert array.head() == true
 

An alias for first().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

head

public static byte head(byte[] self)

Returns the first item from the byte array.

 byte[] bytes = [1, 2, 3]
 assert bytes.head() == 1
 

An alias for first().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

head

public static char head(char[] self)

Returns the first item from the char array.

 char[] chars = ['a', 'b', 'c']
 assert chars.head() == 'a'
 

An alias for first().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

head

public static short head(short[] self)

Returns the first item from the short array.

 short[] shorts = [10, 20, 30]
 assert shorts.head() == 10
 

An alias for first().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

head

public static int head(int[] self)

Returns the first item from the int array.

 int[] ints = [1, 3, 5]
 assert ints.head() == 1
 

An alias for first().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

head

public static long head(long[] self)

Returns the first item from the long array.

 long[] longs = [2L, 4L, 6L]
 assert longs.head() == 2L
 

An alias for first().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

head

public static float head(float[] self)

Returns the first item from the float array.

 float[] floats = [2.0f, 4.0f, 6.0f]
 assert floats.head() == 2.0f
 

An alias for first().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

head

public static double head(double[] self)

Returns the first item from the double array.

 double[] doubles = [10.0d, 20.0d, 30.0d]
 assert doubles.head() == 10.0d
 

An alias for first().

Parameters:

self - an array

Returns:

the first element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

head

public static <T> T head(T[] self)

Returns the first item from the Object array.

def array = [3, 4, 2].toArray()
 assert array.head() == 3

Parameters:

self - an array

Returns:

the first item from the Object array

Throws:

NoSuchElementException - if the array is empty

Since:

1.7.3

indexOf

public static int indexOf(Object[] self,
 Object object)

Returns the index of the first occurrence of the specified element in the array. That is, the lowest index i such that Objects.equals(array[i], object) or -1 if there is no such index.

 String[] array = ['foo','bar','foo']
 assert array.indexOf('foo') ==  0
 assert array.indexOf('bar') ==  1
 assert array.indexOf('baz') == -1
 assert array.indexOf(12345) == -1
 

Since:

5.0.0

indexed

public static Map<Integer,Integer> indexed(int[] self)

Zips an int[] with indices in (index, value) order starting from index 0.

Example usage:

 int[] nums = [10, 20, 30]
 assert [0: 10, 1: 20, 2: 30] == nums.indexed()
 

Since:

3.0.8

See Also:

• indexed(int[], int)

indexed

public static Map<Integer,Long> indexed(long[] self)

Zips a long[] with indices in (index, value) order starting from index 0.

Example usage:

 long[] nums = [10L, 20L, 30L]
 assert [0: 10L, 1: 20L, 2: 30L] == nums.indexed()
 

Since:

3.0.8

See Also:

• indexed(long[], int)

indexed

public static Map<Integer,Double> indexed(double[] self)

Zips a double[] with indices in (index, value) order starting from index 0.

Example usage:

 double[] nums = [10.0d, 20.0d, 30.0d]
 assert [0: 10.0d, 1: 20.0d, 2: 30.0d] == nums.indexed()
 

Since:

3.0.8

See Also:

• indexed(double[], int)

indexed

public static Map<Integer,Integer> indexed(int[] self,
 int offset)

Zips an int[] with indices in (index, value) order.

Example usage:

 int[] nums = [10, 20, 30]
 assert [5: 10, 6: 20, 7: 30] == nums.indexed(5)
 assert ["1: 10", "2: 20", "3: 30"] == nums.indexed(1).collect { idx, str -> "$idx: $str" }
 

Parameters:

self - an Iterable

offset - an index to start from

Returns:

a Map (since the keys/indices are unique) containing the elements from the iterable zipped with indices

Since:

3.0.8

See Also:

• DefaultGroovyMethods.indexed(Iterable, int)

indexed

public static Map<Integer,Long> indexed(long[] self,
 int offset)

Zips a long[] with indices in (index, value) order.

Example usage:

 long[] nums = [10L, 20L, 30L]
 assert [5: 10L, 6: 20L, 7: 30L] == nums.indexed(5)
 

Parameters:

self - a long[]

offset - an index to start from

Returns:

a Map (since the keys/indices are unique) containing the elements from the iterable zipped with indices

Since:

3.0.8

See Also:

• DefaultGroovyMethods.indexed(Iterable, int)

indexed

public static Map<Integer,Double> indexed(double[] self,
 int offset)

Zips a double[] with indices in (index, value) order.

Example usage:

 double[] nums = [10.0d, 20.0d, 30.0d]
 assert [5: 10.0d, 6: 20.0d, 7: 30.0d] == nums.indexed(5)
 

Parameters:

self - a double[]

offset - an index to start from

Returns:

a Map (since the keys/indices are unique) containing the elements from the iterable zipped with indices

Since:

3.0.8

See Also:

• DefaultGroovyMethods.indexed(Iterable, int)

init

public static boolean[] init(boolean[] self)

Returns the items from the boolean array excluding the last item.

 boolean[] array = [true, false, true]
 def result = array.init()
 assert result == [true, false]
 assert array.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its last element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

init

public static byte[] init(byte[] self)

Returns the items from the byte array excluding the last item.

 byte[] bytes = [1, 2, 3]
 def result = bytes.init()
 assert result == [1, 2]
 assert bytes.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its last element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

init

public static char[] init(char[] self)

Returns the items from the char array excluding the last item.

 char[] chars = ['a', 'b', 'c']
 def result = chars.init()
 assert result == ['a', 'b']
 assert chars.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its last element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

init

public static short[] init(short[] self)

Returns the items from the short array excluding the last item.

 short[] shorts = [10, 20, 30]
 def result = shorts.init()
 assert result == [10, 20]
 assert shorts.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its last element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

init

public static int[] init(int[] self)

Returns the items from the int array excluding the last item.

 int[] ints = [1, 3, 5]
 def result = ints.init()
 assert result == [1, 3]
 assert ints.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its last element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

init

public static long[] init(long[] self)

Returns the items from the long array excluding the last item.

 long[] longs = [2L, 4L, 6L]
 def result = longs.init()
 assert result == [2L, 4L]
 assert longs.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its last element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

init

public static float[] init(float[] self)

Returns the items from the float array excluding the last item.

 float[] floats = [2.0f, 4.0f, 6.0f]
 def result = floats.init()
 assert result == [2.0f, 4.0f]
 assert floats.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its last element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

init

public static double[] init(double[] self)

Returns the items from the double array excluding the last item.

 double[] doubles = [10.0d, 20.0d, 30.0d]
 def result = doubles.init()
 assert result == [10.0d, 20.0d]
 assert doubles.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its last element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

init

public static <T> T[] init(T[] self)

Returns the items from the Object array excluding the last item.

     String[] strings = ["a", "b", "c"]
     def result = strings.init()
     assert result.length == 2
     assert strings.class.componentType == String
 

Parameters:

self - an array

Returns:

an array without its last element

Throws:

UnsupportedOperationException - if the array is empty

Since:

2.4.0

inject

public static <E extends T,
T,
V extends T> T inject(E[] self,
 @ClosureParams(value=FromString.class,options="T,E")
 Closure<V> closure)

Iterates through the given array, passing the first two elements to the closure. The result is passed back (injected) to the closure along with the third element and so on until all array elements have been consumed.

 def array = new Number[] {1, 2, 3, 4}
 def value = array.inject { acc, val -> acc * val }
 assert value == 24

 array = new Object[] {['a','b'], ['b','c'], ['d','b']}
 value = array.inject { acc, val -> acc.intersect(val) }
 assert value == ['b']

 array = new String[] {'t', 'i', 'm'}
 value = array.inject { acc, val -> acc + val }
 assert value == 'tim'
 

Parameters:

self - an array

closure - a closure

Returns:

first value for single-element array or the result of the last closure call

Throws:

NoSuchElementException - if the array is empty

Since:

1.8.7

See Also:

• inject(Object[], Object, Closure)

inject

public static <E,
T,
U extends T,
V extends T> T inject(E[] self,
 U initialValue,
 @ClosureParams(value=FromString.class,options="T,E")
 Closure<V> closure)

Iterates through the given array, passing in the initial value and the first element to the closure. The result is sent back (injected) with the second element. The new result is injected back into the closure with the third element and so on until all elements have been consumed.

 def array = new Number[] {2, 3, 4}
 def value = array.inject(1) { acc, val -> acc * val }
 assert value == 24

 array = new Object[] {['a','b'], ['b','c'], ['d','b']}
 value = array.inject(['a','b','c']) { acc, val -> acc.intersect(val) }
 assert value == ['b']

 array = new String[] {'t', 'i', 'm'}
 value = array.inject("") { acc, val -> acc + val }
 assert value == 'tim'
 

Parameters:

self - an array

initialValue - base value

closure - a closure

Returns:

base value for empty array or the result of the last closure call

Since:

1.5.0

iterator

public static <T> Iterator<T> iterator(T[] self)

Returns an Iterator which traverses the given array in index order.

Parameters:

self - an array

Returns:

an Iterator backed by the given Array.

Since:

1.6.4

See Also:

• ArrayIterator

join

public static String join(boolean[] self)

Concatenates the string representation of each item in this array.

Parameters:

self - an array of boolean

Returns:

the joined String

Since:

5.0.0

join

public static String join(byte[] self)

Concatenates the string representation of each item in this array.

Parameters:

self - an array of byte

Returns:

the joined String

Since:

5.0.0

join

public static String join(char[] self)

Concatenates the string representation of each item in this array.

Parameters:

self - an array of char

Returns:

the joined String

Since:

5.0.0

join

public static String join(short[] self)

Concatenates the string representation of each item in this array.

Parameters:

self - an array of short

Returns:

the joined String

Since:

5.0.0

join

public static String join(int[] self)

Concatenates the string representation of each item in this array.

Parameters:

self - an array of int

Returns:

the joined String

Since:

5.0.0

join

public static String join(long[] self)

Concatenates the string representation of each item in this array.

Parameters:

self - an array of long

Returns:

the joined String

Since:

5.0.0

join

public static String join(float[] self)

Concatenates the string representation of each item in this array.

Parameters:

self - an array of float

Returns:

the joined String

Since:

5.0.0

join

public static String join(double[] self)

Concatenates the string representation of each item in this array.

Parameters:

self - an array of double

Returns:

the joined String

Since:

5.0.0

join

public static String join(Object[] self)

Concatenates the string representation of each item in this array.

 def array = new Number[]{1,2L,3G}
 assert array.join() == "123"
 

Parameters:

self - an array of Object

Returns:

the joined String

Since:

5.0.0

join

public static String join(boolean[] self,
 String separator)

Concatenates the string representation of each item in this array, with the given String as a separator between each item.

Parameters:

self - an array of boolean

separator - a String separator

Returns:

the joined String

Since:

2.4.1

join

public static String join(byte[] self,
 String separator)

Concatenates the string representation of each item in this array, with the given String as a separator between each item.

Parameters:

self - an array of byte

separator - a String separator

Returns:

the joined String

Since:

2.4.1

join

public static String join(char[] self,
 String separator)

Concatenates the string representation of each item in this array, with the given String as a separator between each item.

Parameters:

self - an array of char

separator - a String separator

Returns:

the joined String

Since:

2.4.1

join

public static String join(short[] self,
 String separator)

Concatenates the string representation of each item in this array, with the given String as a separator between each item.

Parameters:

self - an array of short

separator - a String separator

Returns:

the joined String

Since:

2.4.1

join

public static String join(int[] self,
 String separator)

Concatenates the string representation of each item in this array, with the given String as a separator between each item.

Parameters:

self - an array of int

separator - a String separator

Returns:

the joined String

Since:

2.4.1

join

public static String join(long[] self,
 String separator)

Concatenates the string representation of each item in this array, with the given String as a separator between each item.

Parameters:

self - an array of long

separator - a String separator

Returns:

the joined String

Since:

2.4.1

join

public static String join(float[] self,
 String separator)

Concatenates the string representation of each item in this array, with the given String as a separator between each item.

Parameters:

self - an array of float

separator - a String separator

Returns:

the joined String

Since:

2.4.1

join

public static String join(double[] self,
 String separator)

Concatenates the string representation of each item in this array, with the given String as a separator between each item.

Parameters:

self - an array of double

separator - a String separator

Returns:

the joined String

Since:

2.4.1

join

public static String join(Object[] self,
 String separator)

Concatenates the string representation of each item in this array, with the given String as a separator between each item.

 Serializable[] array = [1,2L,-3G]
 assert array.join("+") == "1+2+-3"
 

Parameters:

self - an array of Object

separator - a String separator

Returns:

the joined String

Since:

1.0

last

public static boolean last(boolean[] self)

Returns the last item from the boolean array.

 boolean[] array = [true, false, true]
 assert array.last() == true
 

Parameters:

self - an array

Returns:

the last element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

last

public static byte last(byte[] self)

Returns the last item from the byte array.

 byte[] bytes = [1, 2, 3]
 assert bytes.last() == 3
 

Parameters:

self - an array

Returns:

the last element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

last

public static char last(char[] self)

Returns the last item from the char array.

 char[] chars = ['a', 'b', 'c']
 assert chars.last() == 'c'
 

Parameters:

self - an array

Returns:

the last element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

last

public static short last(short[] self)

Returns the last item from the short array.

 short[] shorts = [10, 20, 30]
 assert shorts.last() == 30
 

Parameters:

self - an array

Returns:

the last element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

last

public static int last(int[] self)

Returns the last item from the int array.

 int[] ints = [1, 3, 5]
 assert ints.last() == 5
 

Parameters:

self - an array

Returns:

the last element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

last

public static long last(long[] self)

Returns the last item from the long array.

 long[] longs = [2L, 4L, 6L]
 assert longs.last() == 6L
 

Parameters:

self - an array

Returns:

the last element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

last

public static float last(float[] self)

Returns the last item from the float array.

 float[] floats = [2.0f, 4.0f, 6.0f]
 assert floats.last() == 6.0f
 

Parameters:

self - an array

Returns:

the last element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

last

public static double last(double[] self)

Returns the last item from the double array.

 double[] doubles = [10.0d, 20.0d, 30.0d]
 assert doubles.last() == 30.0d
 

Parameters:

self - an array

Returns:

the last element

Throws:

NoSuchElementException - if the array is empty

Since:

5.0.0

last

public static <T> T last(T[] self)

Returns the last item from the array.

 def array = [3, 4, 2].toArray()
 assert array.last() == 2
 

Parameters:

self - an array

Returns:

the last item from the array

Throws:

NoSuchElementException - if you try to access last() for an empty array

Since:

1.7.3

lastIndexOf

public static int lastIndexOf(Object[] self,
 Object object)

Returns the index of the last occurrence of the specified element in the array. That is, the highest index i such that Objects.equals(array[i], object) or -1 if there is no such index.

 String[] array = ['foo','bar','foo']
 assert array.lastIndexOf('foo') ==  2
 assert array.lastIndexOf('bar') ==  1
 assert array.lastIndexOf('baz') == -1
 assert array.lastIndexOf(12345) == -1
 

Since:

5.0.0

max

public static int max(int[] self)

Adds max() method to int arrays.

Example usage:

 int[] nums = [1, 3, 2]
 assert 3 == nums.max()
 

Parameters:

self - an int array

Returns:

the maximum value

Since:

3.0.8

max

public static long max(long[] self)

Adds max() method to long arrays.

Example usage:

 long[] nums = [1L, 3L, 2L]
 assert 3L == nums.max()
 

Parameters:

self - a long array

Returns:

the maximum value

Since:

3.0.8

max

public static double max(double[] self)

Adds max() method to double arrays.

Example usage:

 double[] nums = [1.1d, 3.3d, 2.2d]
 assert 3.3d == nums.max()
 

Parameters:

self - a double array

Returns:

the maximum value

Since:

3.0.8

max

public static <T> T max(T[] self)

Adds max() method to Object arrays.

Parameters:

self - an array

Returns:

the maximum value

Since:

1.5.5

See Also:

• DefaultGroovyMethods.max(Iterator)

max

@Incubating
public static int max(int[] self,
 IntComparator comparator)

Selects the maximum value found from the int array using the supplier IntBinaryOperator as a comparator to determine the maximum of any two values.

 int[] nums = [10, 20, -30]
 assert 20 == nums.max{ n, m -> n <=> m }
 assert -30 == nums.max{ n, m -> n.abs() <=> m.abs() }
 

Parameters:

self - an int array

comparator - a comparator, i.e. returns a negative value if the first parameter is less than the second

Returns:

the maximum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

max

@Incubating
public static int max(int[] self,
 IntUnaryOperator operator)

Selects the maximum value found from the int array using the supplier IntUnaryOperator to determine the maximum of any two values. The operator is applied to each array element and the results are compared.

 int[] nums = [10, 20, -30]
 assert 20 == nums.max{ it }
 assert -30 == nums.max{ it.abs() }
 

Parameters:

self - an int array

operator - an operator that returns an int used for comparing values

Returns:

the maximum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

max

@Incubating
public static long max(long[] self,
 LongComparator comparator)

Selects the maximum value found from the long array using the supplier LongBinaryOperator as a comparator to determine the maximum of any two values.

 long[] nums = [10L, 20L, -30L]
 assert 20L == nums.max{ n, m -> n <=> m }
 assert -30L == nums.max{ n, m -> n.abs() <=> m.abs() }
 

Parameters:

self - a long array

comparator - a comparator, i.e. returns a negative value if the first parameter is less than the second

Returns:

the maximum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

max

@Incubating
public static long max(long[] self,
 LongUnaryOperator operator)

Selects the maximum value found from the long array using the supplier LongUnaryOperator to determine the maximum of any two values. The operator is applied to each array element and the results are compared.

 long[] nums = [10L, 20L, -30L]
 assert 20L == nums.max{ it }
 assert -30L == nums.max{ it.abs() }
 

Parameters:

self - a long array

operator - an operator that returns a long used for comparing values

Returns:

the maximum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

max

@Incubating
public static double max(double[] self,
 DoubleComparator comparator)

Selects the maximum value found from the double array using the supplier DoubleComparator to determine the maximum of any two values.

 double[] nums = [10d, 20d, -30d]
 assert 20d == nums.max{ n, m -> n <=> m }
 assert -30d == nums.max{ n, m -> n.abs() <=> m.abs() }
 

Parameters:

self - a double array

comparator - a comparator, i.e. returns a negative value if the first parameter is less than the second

Returns:

the maximum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

max

@Incubating
public static double max(double[] self,
 DoubleUnaryOperator operator)

Selects the maximum value found from the double array using the supplier DoubleUnaryOperator to determine the maximum of any two values. The operator is applied to each array element and the results are compared.

 double[] nums = [10d, 20d, -30d]
 assert -30d == nums.max{ it.abs() }
 assert 20d == nums.max{ it }
 

Parameters:

self - a double array

operator - an operator that returns a double used for comparing values

Returns:

the maximum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

max

public static <T> T max(T[] self,
 Comparator<? super T> comparator)

Selects the maximum value found from the Object array using the given comparator.

Parameters:

self - an array

comparator - a Comparator

Returns:

the maximum value

Since:

1.5.5

See Also:

• DefaultGroovyMethods.max(Iterator, Comparator)

max

public static <T> T max(T[] self,
 @ClosureParams(value=FromString.class,options={"T","T,T"})
 Closure<?> closure)

Selects the maximum value found from the Object array using the closure to determine the correct ordering.

If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

Parameters:

self - an array

closure - a Closure used to determine the correct ordering

Returns:

the maximum value

Since:

1.5.5

maxBy

@Incubating
public static int maxBy(int[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Selects the maximum value found from the int array using the closure to determine the maximum of any two values.

 int[] nums = [30, 45, 60, 90]
 assert 90 == nums.maxBy{ Math.sin(Math.toRadians(it)) }
 assert 30 == nums.maxBy{ Math.cos(Math.toRadians(it)) } // cos(90) == 0
 

If the closure has two parameters it is used like a traditional Comparator, i.e., it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

Parameters:

self - an int array

closure - a Closure used to determine the correct ordering

Returns:

the maximum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.max(Iterator, groovy.lang.Closure)

maxBy

@Incubating
public static long maxBy(long[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Selects the maximum value found from the long array using the closure to determine the maximum of any two values.

 long[] nums = [-30L, 10L, 20L]
 assert 20L == nums.maxBy{ a, b -> a <=> b }
 assert -30L == nums.maxBy{ it.abs() }
 

If the closure has two parameters it is used like a traditional Comparator, i.e., it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

Parameters:

self - a long array

closure - a Closure used to determine the correct ordering

Returns:

the maximum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.max(Iterator, groovy.lang.Closure)

maxBy

@Incubating
public static double maxBy(double[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Selects the maximum value found from the double array using the closure to determine the maximum of any two values.

 double[] nums = [-30.0d, 10.0d, 20.0d]
 assert 20.0d == nums.maxBy{ a, b -> a <=> b }
 assert -30.0d == nums.maxBy{ it.abs() }
 

If the closure has two parameters it is used like a traditional Comparator, i.e., it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

Parameters:

self - a double array

closure - a Closure used to determine the correct ordering

Returns:

the maximum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.max(Iterator, groovy.lang.Closure)

maxComparing

@Incubating
public static int maxComparing(int[] self,
 Comparator<Integer> comparator)

Selects the maximum value found from the int array using the comparator to determine the maximum of any two values.

 int[] nums = [10, 20, 30]
 assert 30 == nums.maxComparing(Comparator.naturalOrder())
 assert 10 == nums.maxComparing(Comparator.reverseOrder())
 

Parameters:

self - an int array

comparator - a Comparator

Returns:

the maximum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.max(Iterator, java.util.Comparator)

maxComparing

@Incubating
public static long maxComparing(long[] self,
 Comparator<Long> comparator)

Selects the maximum value found from the long array using the comparator to determine the maximum of any two values.

 long[] nums = [10L, 20L, 30L]
 assert 30L == nums.maxComparing(Comparator.naturalOrder())
 assert 10L == nums.maxComparing(Comparator.reverseOrder())
 

Parameters:

self - a long array

comparator - a Comparator

Returns:

the maximum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.max(Iterator, java.util.Comparator)

maxComparing

@Incubating
public static double maxComparing(double[] self,
 Comparator<Double> comparator)

Selects the maximum value found from the double array using the comparator to determine the maximum of any two values.

 double[] nums = [10.0d, 20.0d, 30.0d]
 assert 30d == nums.maxComparing(Comparator.naturalOrder())
 assert 10d == nums.maxComparing(Comparator.reverseOrder())
 

Parameters:

self - a double array

comparator - a Comparator

Returns:

the maximum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.max(Iterator, java.util.Comparator)

min

public static int min(int[] self)

Adds min() method to int arrays.

Example usage:

 int[] nums = [20, 10, 30]
 assert 10 == nums.min()
 

Parameters:

self - an int array

Returns:

the minimum value

Since:

3.0.8

min

public static long min(long[] self)

Adds min() method to long arrays.

Example usage:

 long[] nums = [20L, 10L, 30L]
 assert 10L == nums.min()
 

Parameters:

self - a long array

Returns:

the minimum value

Since:

3.0.8

min

public static double min(double[] self)

Adds min() method to double arrays.

Example usage:

 double[] nums = [20.0d, 10.0d, 30.0d]
 assert 10.0d == nums.min()
 

Parameters:

self - a double array

Returns:

the minimum value

Since:

3.0.8

min

public static <T> T min(T[] self)

Adds min() method to Object arrays.

Parameters:

self - an array

Returns:

the minimum value

Since:

1.5.5

See Also:

• DefaultGroovyMethods.min(Iterator)

min

@Incubating
public static int min(int[] self,
 IntComparator comparator)

Selects the minimum value found from the int array using the supplier IntComparator to determine the minimum of any two values.

 int[] nums = [10, -20, 30]
 assert -20 == nums.min{ n, m -> n <=> m }
 assert 10 == nums.min{ n, m -> n.abs() <=> m.abs() }
 

Parameters:

self - an int array

comparator - a comparator, i.e. returns a negative value if the first parameter is less than the second

Returns:

the minimum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

min

@Incubating
public static int min(int[] self,
 IntUnaryOperator operator)

Selects the minimum value found from the int array using the supplier IntUnaryOperator to determine the minimum of any two values. The operator is applied to each array element and the results are compared.

 int[] nums = [10, -20, 30]
 assert -20L == nums.min{ n -> n }
 assert 10L == nums.min{ n -> n.abs() }
 

Parameters:

self - an int array

operator - an operator that returns an int used for comparing values

Returns:

the minimum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

min

@Incubating
public static long min(long[] self,
 LongComparator comparator)

Selects the minimum value found from the long array using the supplier LongBinaryOperator as a comparator to determine the minimum of any two values.

 long[] nums = [10L, -20L, 30L]
 assert -20L == nums.min{ n, m -> n <=> m }
 assert 10L == nums.min{ n, m -> n.abs() <=> m.abs() }
 

Parameters:

self - a long array

comparator - a comparator, i.e. returns a negative value if the first parameter is less than the second

Returns:

the minimum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

min

@Incubating
public static long min(long[] self,
 LongUnaryOperator operator)

Selects the minimum value found from the long array using the supplier LongUnaryOperator to determine the minimum of any two values. The operator is applied to each array element and the results are compared.

 long[] nums = [10L, -20L, 30L]
 assert -20L == nums.min{ it }
 assert 10L == nums.min{ it.abs() }
 

Parameters:

self - a long array

operator - an operator that returns a long used for comparing values

Returns:

the minimum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

min

@Incubating
public static double min(double[] self,
 DoubleComparator comparator)

Selects the minimum value found from the double array using the supplier DoubleBinaryOperator as a comparator to determine the minimum of any two values.

 double[] nums = [10d, -20d, 30d]
 assert -20d == nums.min{ n, m -> n <=> m }
 assert 10d == nums.min{ n, m -> n.abs() <=> m.abs() }
 

Parameters:

self - a double array

comparator - a comparator, i.e. returns a negative value if the first parameter is less than the second

Returns:

the minimum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

min

@Incubating
public static double min(double[] self,
 DoubleUnaryOperator operator)

Selects the minimum value found from the double array using the supplier DoubleUnaryOperator to determine the minimum of any two values. The operator is applied to each array element and the results are compared.

 double[] nums = [10d, -20d, 30d]
 assert -20d == nums.min{ it }
 assert 10d == nums.min{ it.abs() }
 

Parameters:

self - a double array

operator - an operator that returns a double used for comparing values

Returns:

the minimum value

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

min

public static <T> T min(T[] self,
 Comparator<? super T> comparator)

Selects the minimum value found from the Object array using the given comparator.

Parameters:

self - an array

comparator - a Comparator

Returns:

the minimum value

Since:

1.5.5

See Also:

• DefaultGroovyMethods.min(Iterator, java.util.Comparator)

min

public static <T> T min(T[] self,
 @ClosureParams(value=FromString.class,options={"T","T,T"})
 Closure<?> closure)

Selects the minimum value found from the Object array using the closure to determine the correct ordering.

If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

Parameters:

self - an array

closure - a Closure used to determine the correct ordering

Returns:

the minimum value

Since:

1.5.5

See Also:

• DefaultGroovyMethods.min(Iterator, groovy.lang.Closure)

minBy

@Incubating
public static int minBy(int[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Selects the minimum value found from the int array using the closure to determine the minimum of any two values.

 int[] nums = [-20, 10, 30]
 assert -20 == nums.minBy{ a, b -> a <=> b }
 assert 10 == nums.minBy{ it.abs() }
 

If the closure has two parameters it is used like a traditional Comparator, i.e., it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

Parameters:

self - an int array

closure - a Closure used to determine the correct ordering

Returns:

the minimum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.min(Iterator, groovy.lang.Closure)

minBy

@Incubating
public static long minBy(long[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Selects the minimum value found from the long array using the closure to determine the minimum of any two values.

 long[] nums = [-20L, 10L, 30L]
 assert -20L == nums.minBy{ a, b -> a <=> b }
 assert 10L == nums.minBy{ it.abs() }
 

If the closure has two parameters it is used like a traditional Comparator, i.e., it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an int or long) which is then used for further comparison.

Parameters:

self - a long array

closure - a Closure used to determine the correct ordering

Returns:

the minimum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.min(Iterator, groovy.lang.Closure)

minBy

@Incubating
public static double minBy(double[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Selects the minimum value found from the double array using the closure to determine the minimum of any two values.

 double[] nums = [-20.0d, 10.0d, 30.0d]
 assert -20.0d == nums.minBy{ a, b -> a <=> b }
 assert 10.0d == nums.minBy{ it.abs() }
 

If the closure has two parameters it is used like a traditional Comparator, i.e., it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an int or double) which is then used for further comparison.

Parameters:

self - a double array

closure - a Closure used to determine the correct ordering

Returns:

the minimum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.min(Iterator, groovy.lang.Closure)

minComparing

@Incubating
public static int minComparing(int[] self,
 Comparator<Integer> comparator)

Selects the minimum value found from the int array using the comparator to determine the minimum of any two values.

 int[] nums = [1, 2, 3]
 assert 1 == nums.minComparing(Comparator.naturalOrder())
 assert 3 == nums.minComparing(Comparator.reverseOrder())
 

Parameters:

self - an int array

comparator - a Comparator

Returns:

the minimum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.min(Iterator, java.util.Comparator)

minComparing

@Incubating
public static long minComparing(long[] self,
 Comparator<Long> comparator)

Selects the minimum value found from the long array using the comparator to determine the minimum of any two values.

 long[] nums = [10L, 20L, 30L]
 assert 10L == nums.minComparing(Comparator.naturalOrder())
 assert 30L == nums.minComparing(Comparator.reverseOrder())
 

Parameters:

self - a long array

comparator - a Comparator

Returns:

the minimum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.min(Iterator, java.util.Comparator)

minComparing

@Incubating
public static double minComparing(double[] self,
 Comparator<Double> comparator)

Selects the minimum value found from the double array using the comparator to determine the minimum of any two values.

 double[] nums = [10.0d, 20.0d, 30.0d]
 assert 10d == nums.minComparing(Comparator.naturalOrder())
 assert 30d == nums.minComparing(Comparator.reverseOrder())
 

Parameters:

self - a double array

comparator - a Comparator

Returns:

the minimum value

Since:

5.0.0

See Also:

• DefaultGroovyMethods.min(Iterator, java.util.Comparator)

minus

public static <T> T[] minus(T[] self,
 Iterable<?> removeMe)

Creates a new array composed of the elements of the first array minus the elements of the given Iterable.

 Integer[] ints = [1, 2, 3, 1]
 List<Integer> nope = [1, 3]
 def result = ints - nope
 assert result.class == Integer[]
 assert result == new Integer[]{2}

 Integer[] none = []
 result = none - 123
 assert result !== none
 assert result.length == 0
 assert result.class == Integer[]
 

Parameters:

self - an array

removeMe - an Iterable of elements to remove

Returns:

An array with the supplied elements removed.

Since:

1.5.5

minus

public static <T> T[] minus(T[] self,
 Object[] removeMe)

Creates a new array composed of the elements of the first array minus the elements of the given array.

 Integer[] ints = [1, 2, 3, 1]
 Integer[] nope = [1, 3]
 def result = ints - nope
 assert result.class == Integer[]
 assert result == new Integer[]{2}

 Integer[] none = []
 result = none - 123
 assert result !== none
 assert result.length == 0
 assert result.class == Integer[]
 

Parameters:

self - an array

removeMe - an array of elements to remove

Returns:

An array with the supplied elements removed.

Since:

1.5.5

minus

public static <T> T[] minus(T[] self,
 Object removeMe)

Creates a new array composed of the elements of the given array minus every occurrence the given object.

 Integer[] ints = [1, 2, 3, 1]
 def result = ints - 1
 assert result.class == Integer[]
 assert result == new Integer[]{2, 3}

 Integer[] none = []
 result = none - '1'
 assert result !== none
 assert result.length == 0
 assert result.class == Integer[]
 

Parameters:

self - an array

removeMe - an element to remove from the array

Returns:

a new array with the operand removed

Since:

1.5.5

plus

public static <T> T[] plus(T[] left,
 Collection<?> right)

Creates an array containing elements from an original array plus those from a Collection.

 Integer[] a = [1, 2, 3]
 def result = a + [4, 5, 6]
 assert result.class == Integer[]
 assert result == new Integer[]{1, 2, 3, 4, 5, 6}

 Number[] c = [-1, 0.9, null]
 result = c + [1, 2, 3]
 assert result.class == Number[]
 assert result == new Number[]{-1, 0.9, null, 1, 2, 3}

 result = a + [-1, 0.9, null]
 assert result.class == Integer[]
 assert result == new Integer[]{1, 2, 3, -1, 0, null}

 // improper type arguments; Date can't be coerced to Integer
 groovy.test.GroovyAssert.shouldFail(ClassCastException) { a + [new Date()] }
 

Parameters:

left - the array

right - a Collection to be appended

Returns:

A new array containing left with right appended to it.

Throws:

ClassCastException - if any elements from right aren't compatible (according to DefaultTypeTransformation.castToType(Object, Class)) to the component type of left

Since:

1.8.7

plus

public static <T> T[] plus(T[] left,
 Iterable<?> right)

Creates an array containing elements from an original array plus those from an Iterable.

 class AbcIterable implements Iterable {
     Iterator iterator() { "abc".iterator() }
 }
 String[] array = ['x', 'y', 'z']
 def result = array + new AbcIterable()
 assert result.class == String[]
 assert result == new String[]{'x', 'y', 'z', 'a', 'b', 'c'}
 

Parameters:

left - the array

right - an Iterable to be appended

Returns:

A new array containing elements from left with those from right appended.

Throws:

ClassCastException - if any elements from right aren't compatible (according to DefaultTypeTransformation.castToType(Object, Class)) to the component type of left

Since:

1.8.7

See Also:

• union(Object[], Iterable)

plus

public static <T> T[] plus(T[] left,
 Object[] right)

Creates an array as a union of two arrays.

 Integer[] a = [1, 2, 3]
 Integer[] b = [4, 5, 6]
 def result = a + b
 assert result.class == Integer[]
 assert result == new Integer[]{1, 2, 3, 4, 5, 6}

 Number[] c = [-1, 0.9, null]
 result = c + a
 assert result.class == Number[]
 assert result == new Number[]{-1, 0.9, null, 1, 2, 3}

 result = a + c
 assert result.class == Integer[]
 assert result == new Integer[]{1, 2, 3, -1, 0, null}

 Date[] d = [new Date()]
 // improper type arguments; Date can't be coerced to Integer
 groovy.test.GroovyAssert.shouldFail(ClassCastException) { a + d }
 

Parameters:

left - the left Array

right - the right Array

Returns:

A new array containing right appended to left.

Throws:

ClassCastException - if any elements from right aren't compatible (according to DefaultTypeTransformation.castToType(Object, Class)) to the component type of left

Since:

1.8.7

plus

public static <T> T[] plus(T[] left,
 Object right)

Creates an array containing elements from an original array plus an additional appended element.

 Integer[] a = [1, 2, 3]
 def result = a + 4
 assert result.class == Integer[]
 assert result == new Integer[]{1, 2, 3, 4}

 result = a + 5.5d
 assert result.class == Integer[]
 assert result == new Integer[]{1, 2, 3, 5}

 // improper type arguments; Date can't be coerced to Integer
 groovy.test.GroovyAssert.shouldFail(ClassCastException) { a + new Date() }
 

Parameters:

left - the array

right - the value to append

Returns:

A new array containing left with right appended to it.

Throws:

ClassCastException - if any elements from right aren't compatible (according to DefaultTypeTransformation.castToType(Object, Class)) to the component type of left

Since:

1.8.7

reverse

public static boolean[] reverse(boolean[] self)

Creates a new boolean array containing items which are the same as this array but in reverse order.

 boolean[] array = [false, true]
 assert array.reverse() == [true, false]
 

Parameters:

self - a boolean array

Returns:

an array containing the reversed items

Since:

5.0.0

See Also:

• reverse(boolean[], boolean)

reverse

public static boolean[] reverse(boolean[] self,
 boolean mutate)

Reverses the items in an array. If mutate is true, the original array is modified in place and returned. Otherwise, a new array containing the reversed items is produced.

 boolean[] array = [false, true, true]
 def yarra = array.reverse(true)
 assert array == [true, true, false]
 assert yarra == [true, true, false]
 assert array === yarra
 yarra = array.reverse(false)
 assert array !== yarra
 assert array == [true, true, false]
 assert yarra == [false, true, true]
 

Parameters:

self - a boolean array

mutate - true if the array itself should be reversed in place, false if a new array should be created

Returns:

an array containing the reversed items

Since:

5.0.0

reverse

public static byte[] reverse(byte[] self)

Creates a new byte array containing items which are the same as this array but in reverse order.

 byte[] array = 1..2
 assert array.reverse() == 2..1
 

Parameters:

self - a byte array

Returns:

an array containing the reversed items

Since:

5.0.0

See Also:

• reverse(byte[], boolean)

reverse

public static byte[] reverse(byte[] self,
 boolean mutate)

Reverses the items in an array. If mutate is true, the original array is modified in place and returned. Otherwise, a new array containing the reversed items is produced.

 byte[] array = 1..3
 def yarra = array.reverse(true)
 assert array == 3..1
 assert yarra == 3..1
 assert array === yarra
 yarra = array.reverse(false)
 assert array !== yarra
 assert array == 3..1
 assert yarra == 1..3
 

Parameters:

self - a byte array

mutate - true if the array itself should be reversed in place, false if a new array should be created

Returns:

an array containing the reversed items

Since:

5.0.0

reverse

public static char[] reverse(char[] self)

Creates a new char array containing items which are the same as this array but in reverse order.

 char[] array = ['a', 'b']
 assert array.reverse() == ['b', 'a'] as char[]
 

Parameters:

self - a char array

Returns:

an array containing the reversed items

Since:

5.0.0

See Also:

• reverse(char[], boolean)

reverse

public static char[] reverse(char[] self,
 boolean mutate)

Reverses the items in an array. If mutate is true, the original array is modified in place and returned. Otherwise, a new array containing the reversed items is produced.

 char[] array = ['a', 'b', 'c']
 def yarra = array.reverse(true)
 assert array == ['c', 'b', 'a']
 assert yarra == ['c', 'b', 'a']
 assert array === yarra
 yarra = array.reverse(false)
 assert array !== yarra
 assert array == ['c', 'b', 'a']
 assert yarra == ['a', 'b', 'c']
 

Parameters:

self - a char array

mutate - true if the array itself should be reversed in place, false if a new array should be created

Returns:

an array containing the reversed items

Since:

5.0.0

reverse

public static short[] reverse(short[] self)

Creates a new short array containing items which are the same as this array but in reverse order.

 short[] array = 1..2
 assert array.reverse() == 2..1
 

Parameters:

self - a short array

Returns:

an array containing the reversed items

Since:

5.0.0

See Also:

• reverse(short[], boolean)

reverse

public static short[] reverse(short[] self,
 boolean mutate)

Reverses the items in an array. If mutate is true, the original array is modified in place and returned. Otherwise, a new array containing the reversed items is produced.

 short[] array = 1..3
 def yarra = array.reverse(true)
 assert array == 3..1
 assert yarra == 3..1
 assert array === yarra
 yarra = array.reverse(false)
 assert array !== yarra
 assert array == 3..1
 assert yarra == 1..3
 

Parameters:

self - a short array

mutate - true if the array itself should be reversed in place, false if a new array should be created

Returns:

an array containing the reversed items

Since:

5.0.0

reverse

public static int[] reverse(int[] self)

Creates a new int array containing items which are the same as this array but in reverse order.

 int[] array = 1..2
 assert array.reverse() == 2..1
 

Parameters:

self - an int array

Returns:

an array containing the reversed items

Since:

5.0.0

See Also:

• reverse(int[], boolean)

reverse

public static int[] reverse(int[] self,
 boolean mutate)

Reverses the items in an array. If mutate is true, the original array is modified in place and returned. Otherwise, a new array containing the reversed items is produced.

 int[] array = 1..3
 def yarra = array.reverse(true)
 assert array == 3..1
 assert yarra == 3..1
 assert array === yarra
 yarra = array.reverse(false)
 assert array !== yarra
 assert array == 3..1
 assert yarra == 1..3
 

Parameters:

self - an int array

mutate - true if the array itself should be reversed in place, false if a new array should be created

Returns:

an array containing the reversed items

Since:

5.0.0

reverse

public static long[] reverse(long[] self)

Creates a new long array containing items which are the same as this array but in reverse order.

 long[] array = 1L..2L
 assert array.reverse() == 2L..1L
 

Parameters:

self - a long array

Returns:

an array containing the reversed items

Since:

5.0.0

See Also:

• reverse(long[], boolean)

reverse

public static long[] reverse(long[] self,
 boolean mutate)

Reverses the items in an array. If mutate is true, the original array is modified in place and returned. Otherwise, a new array containing the reversed items is produced.

 long[] array = 1L..3L
 def yarra = array.reverse(true)
 assert array == 3L..1L
 assert yarra == 3L..1L
 assert array === yarra
 yarra = array.reverse(false)
 assert array !== yarra
 assert array == 3L..1L
 assert yarra == 1L..3L
 

Parameters:

self - a long array

mutate - true if the array itself should be reversed in place, false if a new array should be created

Returns:

an array containing the reversed items

Since:

5.0.0

reverse

public static float[] reverse(float[] self)

Creates a new float array containing items which are the same as this array but in reverse order.

 float[] array = [1f, 2f]
 assert array.reverse() == [2f, 1f]
 

Parameters:

self - a float array

Returns:

an array containing the reversed items

Since:

5.0.0

See Also:

• reverse(float[], boolean)

reverse

public static float[] reverse(float[] self,
 boolean mutate)

Reverses the items in an array. If mutate is true, the original array is modified in place and returned. Otherwise, a new array containing the reversed items is produced.

 float[] array = 1f..3f
 def yarra = array.reverse(true)
 assert array == 3f..1f
 assert yarra == 3f..1f
 assert array === yarra
 yarra = array.reverse(false)
 assert array !== yarra
 assert array == 3f..1f
 assert yarra == 1f..3f
 

Parameters:

self - a float array

mutate - true if the array itself should be reversed in place, false if a new array should be created

Returns:

an array containing the reversed items

Since:

5.0.0

reverse

public static double[] reverse(double[] self)

Creates a new double array containing items which are the same as this array but in reverse order.

 double[] array = [1d, 2d]
 assert array.reverse() == [2d, 1d]
 

Parameters:

self - a double array

Returns:

an array containing the reversed items

Since:

5.0.0

See Also:

• reverse(double[], boolean)

reverse

public static double[] reverse(double[] self,
 boolean mutate)

Reverses the items in an array. If mutate is true, the original array is modified in place and returned. Otherwise, a new array containing the reversed items is produced.

 double[] array = 1d..3d
 def yarra = array.reverse(true)
 assert array == 3d..1d
 assert yarra == 3d..1d
 assert array === yarra
 yarra = array.reverse(false)
 assert array !== yarra
 assert array == 3d..1d
 assert yarra == 1d..3d
 

Parameters:

self - a double array

mutate - true if the array itself should be reversed in place, false if a new array should be created

Returns:

an array containing the reversed items

Since:

5.0.0

reverse

public static <T> T[] reverse(T[] self)

Creates a new array containing items which are the same as this array but in reverse order.

Parameters:

self - an array

Returns:

An array containing the reversed items.

Since:

1.5.5

See Also:

• reverse(Object[], boolean)

reverse

public static <T> T[] reverse(T[] self,
 boolean mutate)

Reverses the items in an array. If mutate is true, the original array is modified in place and returned. Otherwise, a new array containing the reversed items is produced.

 def array = new Object[] {1,2,3}
 def yarra = array.reverse(true)
 assert array == 3..1
 assert yarra == 3..1

 yarra = array.reverse(false)
 assert array == 3..1
 assert yarra == 1..3
 

Parameters:

self - an array

mutate - true if the array itself should be reversed in place, false if a new array should be created

Returns:

An array containing the reversed items.

Since:

1.8.1

reverseEach

public static boolean[] reverseEach(boolean[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Iterates through a boolean[] in reverse order passing each boolean to the given closure.

 boolean[] array = [false, true, true]
 String result = ''
 array.reverseEach{ result += it }
 assert result == 'truetruefalse'
 

Parameters:

self - the boolean array over which we iterate

closure - the closure applied on each boolean

Returns:

the self array

Since:

5.0.0

reverseEach

public static byte[] reverseEach(byte[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Iterates through a byte[] in reverse order passing each byte to the given closure.

 byte[] array = [0, 1, 2]
 String result = ''
 array.reverseEach{ result += it }
 assert result == '210'
 

Parameters:

self - the byte array over which we iterate

closure - the closure applied on each byte

Returns:

the self array

Since:

5.0.0

reverseEach

public static char[] reverseEach(char[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Iterates through a char[] in reverse order passing each char to the given closure.

 char[] array = 'abc'.chars
 String result = ''
 array.reverseEach{ result += it }
 assert result == 'cba'
 

Parameters:

self - the char array over which we iterate

closure - the closure applied on each char

Returns:

the self array

Since:

5.0.0

reverseEach

public static short[] reverseEach(short[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Iterates through a short[] in reverse order passing each short to the given closure.

 short[] array = [0, 1, 2]
 String result = ''
 array.reverseEach{ result += it }
 assert result == '210'
 

Parameters:

self - the short array over which we iterate

closure - the closure applied on each short

Returns:

the self array

Since:

5.0.0

reverseEach

public static int[] reverseEach(int[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Iterates through an int[] in reverse order passing each int to the given closure.

 int[] array = [0, 1, 2]
 String result = ''
 array.reverseEach{ result += it }
 assert result == '210'
 

Parameters:

self - the int array over which we iterate

closure - the closure applied on each int

Returns:

the self array

Since:

5.0.0

reverseEach

public static long[] reverseEach(long[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Iterates through a long[] in reverse order passing each long to the given closure.

 long[] array = [0, 1, 2]
 String result = ''
 array.reverseEach{ result += it }
 assert result == '210'
 

Parameters:

self - the long array over which we iterate

closure - the closure applied on each long

Returns:

the self array

Since:

5.0.0

reverseEach

public static float[] reverseEach(float[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Iterates through a float[] in reverse order passing each float to the given closure.

 float[] array = [0, 1, 2]
 String result = ''
 array.reverseEach{ result += it }
 assert result == '2.01.00.0'
 

Parameters:

self - the float array over which we iterate

closure - the closure applied on each float

Returns:

the self array

Since:

5.0.0

reverseEach

public static double[] reverseEach(double[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Iterates through a double[] in reverse order passing each double to the given closure.

 double[] array = [0, 1, 2]
 String result = ''
 array.reverseEach{ result += it }
 assert result == '2.01.00.0'
 

Parameters:

self - the double array over which we iterate

closure - the closure applied on each double

Returns:

the self array

Since:

5.0.0

reverseEach

public static <T> T[] reverseEach(T[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Iterates over each element of the array in the reverse order.

Parameters:

self - an array

closure - a closure to which each item is passed

Returns:

the original array

Since:

1.5.2

shuffle

public static <T> void shuffle(T[] self)

Randomly reorders the elements of the specified array.

 Integer[] array = [10, 5, 20]
 def origSize = array.size()
 def items = array.toList()
 array.shuffle()
 assert array.size() == origSize
 assert items.every{ array.contains(it) }
 

Parameters:

self - an array

Since:

3.0.0

shuffle

public static <T> void shuffle(T[] self,
 Random rnd)

Randomly reorders the elements of the specified array using the specified random instance as the source of randomness.

 def r = new Random()
 Integer[] array = [10, 5, 20]
 def origSize = array.size()
 def items = array.toList()
 array.shuffle(r)
 assert array.size() == origSize
 assert items.every{ array.contains(it) }
 

Parameters:

self - an array

Since:

3.0.0

shuffled

public static <T> T[] shuffled(T[] self)

Creates a new array containing the elements of the specified array but in a random order.

 Integer[] orig = [10, 5, 20]
 def array = orig.shuffled()
 assert orig.size() == array.size()
 assert orig.every{ array.contains(it) }
 

Parameters:

self - an array

Returns:

the shuffled array

Since:

3.0.0

shuffled

public static <T> T[] shuffled(T[] self,
 Random rnd)

Creates a new array containing the elements of the specified array but in a random order using the specified random instance as the source of randomness.

 def r = new Random()
 Integer[] orig = [10, 5, 20]
 def array = orig.shuffled(r)
 assert orig.size() == array.size()
 assert orig.every{ array.contains(it) }
 

Parameters:

self - an array

Returns:

the shuffled array

Since:

3.0.0

size

public static int size(boolean[] self)

Provides arrays with a size method similar to collections.

 boolean[] array = [true, false, true]
 assert array.size() == 3
 

Parameters:

self - a boolean array

Returns:

the length of the array

Since:

1.5.0

size

public static int size(byte[] self)

Provides arrays with a size method similar to collections.

Parameters:

self - a byte array

Returns:

the length of the array

Since:

1.0

size

public static int size(char[] self)

Provides arrays with a size method similar to collections.

Parameters:

self - a char array

Returns:

the length of the array

Since:

1.0

size

public static int size(short[] self)

Provides arrays with a size method similar to collections.

Parameters:

self - a short array

Returns:

the length of the array

Since:

1.0

size

public static int size(int[] self)

Provides arrays with a size method similar to collections.

Parameters:

self - an int array

Returns:

the length of the array

Since:

1.0

size

public static int size(long[] self)

Provides arrays with a size method similar to collections.

Parameters:

self - a long array

Returns:

the length of the array

Since:

1.0

size

public static int size(float[] self)

Provides arrays with a size method similar to collections.

Parameters:

self - a float array

Returns:

the length of the array

Since:

1.0

size

public static int size(double[] self)

Provides arrays with a size method similar to collections.

Parameters:

self - a double array

Returns:

the length of the array

Since:

1.0

size

public static int size(Object[] self)

Provides the standard Groovy size() method for an array.

Parameters:

self - an object array

Returns:

the length of the array

Since:

1.0

sort

public static <T> T[] sort(T[] self)

Modifies this array so that its elements are in sorted order. The array items are assumed to be comparable.

Parameters:

self - the array to be sorted

Returns:

the sorted array

Since:

1.5.5

sort

public static <T> T[] sort(T[] self,
 boolean mutate)

Sorts the given array into sorted order. The array items are assumed to be comparable. If mutate is true, the array is sorted in place and returned. Otherwise, a new sorted array is returned and the original array remains unchanged.

 def orig = ["hello","hi","Hey"] as String[]
 def sorted = orig.sort(false)
 assert orig == ["hello","hi","Hey"] as String[]
 assert sorted == ["Hey","hello","hi"] as String[]
 orig.sort(true)
 assert orig == ["Hey","hello","hi"] as String[]
 

Parameters:

self - the array to be sorted

mutate - false will always cause a new array to be created, true will mutate the array in place

Returns:

the sorted array

Since:

1.8.1

sort

public static <T> T[] sort(T[] self,
 Comparator<? super T> comparator)

Sorts the given array into sorted order using the given comparator.

Parameters:

self - the array to be sorted

comparator - a Comparator used for the comparison

Returns:

the sorted array

Since:

1.5.5

sort

public static <T> T[] sort(T[] self,
 boolean mutate,
 Comparator<? super T> comparator)

Modifies this array so that its elements are in sorted order as determined by the given comparator. If mutate is true, the array is sorted in place and returned. Otherwise, a new sorted array is returned and the original array remains unchanged.

 def orig = ["hello","hi","Hey"] as String[]
 def sorted = orig.sort(false, String.CASE_INSENSITIVE_ORDER)
 assert orig == ["hello","hi","Hey"] as String[]
 assert sorted == ["hello","Hey","hi"] as String[]
 orig.sort(true, String.CASE_INSENSITIVE_ORDER)
 assert orig == ["hello","Hey","hi"] as String[]
 

Parameters:

self - the array containing elements to be sorted

mutate - false will always cause a new array to be created, true will mutate arrays in place

comparator - a Comparator used for the comparison

Returns:

a sorted array

Since:

1.8.1

sort

public static <T> T[] sort(T[] self,
 @ClosureParams(value=FromString.class,options={"T","T,T"})
 Closure<?> closure)

Sorts the elements from this array into a newly created array using the Closure to determine the correct ordering.

If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

Parameters:

self - the array containing the elements to be sorted

closure - a Closure used to determine the correct ordering

Returns:

the sorted array

Since:

1.5.5

sort

public static <T> T[] sort(T[] self,
 boolean mutate,
 @ClosureParams(value=FromString.class,options={"T","T,T"})
 Closure<?> closure)

Modifies this array so that its elements are in sorted order using the Closure to determine the correct ordering. If mutate is false, a new array is returned and the original array remains unchanged. Otherwise, the original array is sorted in place and returned.

If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

 def orig = ["hello","hi","Hey"] as String[]
 def sorted = orig.sort(false) { it.size() }
 assert orig == ["hello","hi","Hey"] as String[]
 assert sorted == ["hi","Hey","hello"] as String[]
 orig.sort(true) { it.size() }
 assert orig == ["hi","Hey","hello"] as String[]
 

Parameters:

self - the array to be sorted

mutate - false will always cause a new array to be created, true will mutate arrays in place

closure - a Closure used to determine the correct ordering

Returns:

the sorted array

Since:

1.8.1

split

public static <T> Collection<Collection<T>> split(T[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Splits all items into two collections based on the closure condition. The first list contains all items which match the closure expression. The second list all those that don't.

Parameters:

self - an Array

closure - a closure condition

Returns:

a List whose first item is the accepted values and whose second item is the rejected values

Since:

2.5.0

sum

public static byte sum(byte[] self)

Sums the items in an array.

assert (1+2+3+4 as byte) == ([1,2,3,4] as byte[]).sum()

Parameters:

self - The array of values to add together

Returns:

The sum of all the items

Since:

2.4.2

sum

public static char sum(char[] self)

Sums the items in an array.

assert (1+2+3+4 as char) == ([1,2,3,4] as char[]).sum()

Parameters:

self - The array of values to add together

Returns:

The sum of all the items

Since:

2.4.2

sum

public static short sum(short[] self)

Sums the items in an array.

assert (1+2+3+4 as short) == ([1,2,3,4] as short[]).sum()

Parameters:

self - The array of values to add together

Returns:

The sum of all the items

Since:

2.4.2

sum

public static int sum(int[] self)

Sums the items in an array.

assert 1+2+3+4 == ([1,2,3,4] as int[]).sum()

Parameters:

self - The array of values to add together

Returns:

The sum of all the items

Since:

2.4.2

sum

public static long sum(long[] self)

Sums the items in an array.

assert (1+2+3+4 as long) == ([1,2,3,4] as long[]).sum()

Parameters:

self - The array of values to add together

Returns:

The sum of all the items

Since:

2.4.2

sum

public static float sum(float[] self)

Sums the items in an array.

assert (1+2+3+4 as float) == ([1,2,3,4] as float[]).sum()

Parameters:

self - The array of values to add together

Returns:

The sum of all the items

Since:

2.4.2

sum

public static double sum(double[] self)

Sums the items in an array.

assert (1+2+3+4 as double) == ([1,2,3,4] as double[]).sum()

Parameters:

self - The array of values to add together

Returns:

The sum of all the items

Since:

2.4.2

sum

public static Object sum(Object[] self)

Sums the items in an array. This is equivalent to invoking the "plus" method on all items in the array.

Parameters:

self - The array of values to add together

Returns:

The sum of all the items

Since:

1.7.1

See Also:

• DefaultGroovyMethods.sum(java.util.Iterator)

sum

public static byte sum(byte[] self,
 byte initialValue)

Sums the items in an array, adding the result to some initial value.

assert (5+1+2+3+4 as byte) == ([1,2,3,4] as byte[]).sum(5 as byte)

Parameters:

self - an array of values to sum

initialValue - the items in the array will be summed to this initial value

Returns:

The sum of all the items.

Since:

2.4.2

sum

public static char sum(char[] self,
 char initialValue)

Sums the items in an array, adding the result to some initial value.

assert (5+1+2+3+4 as char) == ([1,2,3,4] as char[]).sum(5 as char)

Parameters:

self - an array of values to sum

initialValue - the items in the array will be summed to this initial value

Returns:

The sum of all the items.

Since:

2.4.2

sum

public static short sum(short[] self,
 short initialValue)

Sums the items in an array, adding the result to some initial value.

assert (5+1+2+3+4 as short) == ([1,2,3,4] as short[]).sum(5 as short)

Parameters:

self - an array of values to sum

initialValue - the items in the array will be summed to this initial value

Returns:

The sum of all the items.

Since:

2.4.2

sum

public static int sum(int[] self,
 int initialValue)

Sums the items in an array, adding the result to some initial value.

assert 5+1+2+3+4 == ([1,2,3,4] as int[]).sum(5)

Parameters:

self - an array of values to sum

initialValue - the items in the array will be summed to this initial value

Returns:

The sum of all the items.

Since:

2.4.2

sum

public static long sum(long[] self,
 long initialValue)

Sums the items in an array, adding the result to some initial value.

assert (5+1+2+3+4 as long) == ([1,2,3,4] as long[]).sum(5)

Parameters:

self - an array of values to sum

initialValue - the items in the array will be summed to this initial value

Returns:

The sum of all the items.

Since:

2.4.2

sum

public static float sum(float[] self,
 float initialValue)

Sums the items in an array, adding the result to some initial value.

assert (5+1+2+3+4 as float) == ([1,2,3,4] as float[]).sum(5)

Parameters:

self - an array of values to sum

initialValue - the items in the array will be summed to this initial value

Returns:

The sum of all the items.

Since:

2.4.2

sum

public static double sum(double[] self,
 double initialValue)

Sums the items in an array, adding the result to some initial value.

assert (5+1+2+3+4 as double) == ([1,2,3,4] as double[]).sum(5)

Parameters:

self - an array of values to sum

initialValue - the items in the array will be summed to this initial value

Returns:

The sum of all the items.

Since:

2.4.2

sum

public static Object sum(Object[] self,
 Object initialValue)

Sums the items in an array, adding the result to some initial value.

Parameters:

self - an array of values to sum

initialValue - the items in the array will be summed to this initial value

Returns:

The sum of all the items.

Since:

1.7.1

sum

public static <T> Object sum(T[] self,
 @ClosureParams(Component.class)
 Closure<?> closure)

Sums the result of applying a closure to each item of an array. array.sum(closure) is equivalent to: array.collect(closure).sum().

Parameters:

self - An array

closure - a single parameter closure that returns a (typically) numeric value.

Returns:

The sum of the values returned by applying the closure to each item of the array.

Since:

1.7.1

sum

public static <T> Object sum(T[] self,
 Object initialValue,
 @ClosureParams(Component.class)
 Closure<?> closure)

Sums the result of applying a closure to each item of an array to some initial value. array.sum(initVal, closure) is equivalent to: array.collect(closure).sum(initVal).

Parameters:

self - an array

closure - a single parameter closure that returns a (typically) numeric value.

initialValue - the closure results will be summed to this initial value

Returns:

The sum of the values returned by applying the closure to each item of the array.

Since:

1.7.1

swap

public static boolean[] swap(boolean[] self,
 int i,
 int j)

Swaps two elements at the specified positions.

Example:

 assert ([false, true, false, true] as boolean[]) == ([false, false, true, true] as boolean[]).swap(1, 2)
 

Parameters:

self - a boolean array

i - a position

j - a position

Returns:

self

Since:

2.4.0

swap

public static byte[] swap(byte[] self,
 int i,
 int j)

Swaps two elements at the specified positions.

Example:

 assert ([1, 3, 2, 4] as byte[]) == ([1, 2, 3, 4] as byte[]).swap(1, 2)
 

Parameters:

self - a boolean array

i - a position

j - a position

Returns:

self

Since:

2.4.0

swap

public static char[] swap(char[] self,
 int i,
 int j)

Swaps two elements at the specified positions.

Example:

 assert ([1, 3, 2, 4] as char[]) == ([1, 2, 3, 4] as char[]).swap(1, 2)
 

Parameters:

self - a boolean array

i - a position

j - a position

Returns:

self

Since:

2.4.0

swap

public static short[] swap(short[] self,
 int i,
 int j)

Swaps two elements at the specified positions.

Example:

 assert ([1, 3, 2, 4] as short[]) == ([1, 2, 3, 4] as short[]).swap(1, 2)
 

Parameters:

self - a boolean array

i - a position

j - a position

Returns:

self

Since:

2.4.0

swap

public static int[] swap(int[] self,
 int i,
 int j)

Swaps two elements at the specified positions.

Example:

 assert ([1, 3, 2, 4] as int[]) == ([1, 2, 3, 4] as int[]).swap(1, 2)
 

Parameters:

self - a boolean array

i - a position

j - a position

Returns:

self

Since:

2.4.0

swap

public static long[] swap(long[] self,
 int i,
 int j)

Swaps two elements at the specified positions.

Example:

 assert ([1, 3, 2, 4] as long[]) == ([1, 2, 3, 4] as long[]).swap(1, 2)
 

Parameters:

self - a boolean array

i - a position

j - a position

Returns:

self

Since:

2.4.0

swap

public static float[] swap(float[] self,
 int i,
 int j)

Swaps two elements at the specified positions.

Example:

 assert ([1, 3, 2, 4] as float[]) == ([1, 2, 3, 4] as float[]).swap(1, 2)
 

Parameters:

self - a boolean array

i - a position

j - a position

Returns:

self

Since:

2.4.0

swap

public static double[] swap(double[] self,
 int i,
 int j)

Swaps two elements at the specified positions.

Example:

 assert ([1, 3, 2, 4] as double[]) == ([1, 2, 3, 4] as double[]).swap(1, 2)
 

Parameters:

self - a boolean array

i - a position

j - a position

Returns:

self

Since:

2.4.0

swap

public static <T> T[] swap(T[] self,
 int i,
 int j)

Swaps two elements at the specified positions.

Example:

 assert (["a", "c", "b", "d"] as String[]) == (["a", "b", "c", "d"] as String[]).swap(1, 2)
 

Parameters:

self - an array

i - a position

j - a position

Returns:

self

Since:

2.4.0

tail

public static boolean[] tail(boolean[] self)

Returns the items from the boolean array excluding the first item.

 boolean[] array = [true, false, true]
 def result = array.tail()
 assert result == [false, true]
 assert array.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its first element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

tail

public static byte[] tail(byte[] self)

Returns the items from the byte array excluding the first item.

 byte[] bytes = [1, 2, 3]
 def result = bytes.tail()
 assert result == [2, 3]
 assert bytes.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its first element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

tail

public static char[] tail(char[] self)

Returns the items from the char array excluding the first item.

 char[] chars = ['a', 'b', 'c']
 def result = chars.tail()
 assert result == ['b', 'c']
 assert chars.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its first element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

tail

public static short[] tail(short[] self)

Returns the items from the short array excluding the first item.

 short[] shorts = [10, 20, 30]
 def result = shorts.tail()
 assert result == [20, 30]
 assert shorts.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its first element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

tail

public static int[] tail(int[] self)

Returns the items from the int array excluding the first item.

 int[] ints = [1, 3, 5]
 def result = ints.tail()
 assert result == [3, 5]
 assert ints.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its first element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

tail

public static long[] tail(long[] self)

Returns the items from the long array excluding the first item.

 long[] longs = [2L, 4L, 6L]
 def result = longs.tail()
 assert result == [4L, 6L]
 assert longs.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its first element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

tail

public static float[] tail(float[] self)

Returns the items from the float array excluding the first item.

 float[] floats = [2.0f, 4.0f, 6.0f]
 def result = floats.tail()
 assert result == [4.0f, 6.0f]
 assert floats.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its first element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

tail

public static double[] tail(double[] self)

Returns the items from the double array excluding the first item.

 double[] doubles = [10.0d, 20.0d, 30.0d]
 def result = doubles.tail()
 assert result == [20.0d, 30.0d]
 assert doubles.class.componentType == result.class.componentType
 

Parameters:

self - an array

Returns:

an array without its first element

Throws:

UnsupportedOperationException - if the array is empty

Since:

5.0.0

tail

public static <T> T[] tail(T[] self)

Returns the items from the array excluding the first item.

 String[] strings = ["a", "b", "c"]
 def result = strings.tail()
 assert result.class.componentType == String
 String[] expected = ["b", "c"]
 assert result == expected
 

Parameters:

self - an array

Returns:

an array without its first element

Throws:

UnsupportedOperationException - if the array is empty

Since:

1.7.3

take

public static <T> T[] take(T[] self,
 int num)

Returns the first num elements from the head of this array.

 String[] strings = [ 'a', 'b', 'c' ]
 assert strings.take( 0 ) == [] as String[]
 assert strings.take( 2 ) == [ 'a', 'b' ] as String[]
 assert strings.take( 5 ) == [ 'a', 'b', 'c' ] as String[]
 

Parameters:

self - the original array

num - the number of elements to take from this array

Returns:

an array consisting of the first num elements of this array, or else the whole array if it has less than num elements.

Since:

1.8.1

takeRight

public static <T> T[] takeRight(T[] self,
 int num)

Returns the last num elements from the tail of this array.

 String[] strings = [ 'a', 'b', 'c' ]
 assert strings.takeRight( 0 ) == [] as String[]
 assert strings.takeRight( 2 ) == [ 'b', 'c' ] as String[]
 assert strings.takeRight( 5 ) == [ 'a', 'b', 'c' ] as String[]
 

Parameters:

self - the original array

num - the number of elements to take from this array

Returns:

an array consisting of the last num elements of this array, or else the whole array if it has less than num elements.

Since:

2.4.0

takeWhile

public static <T> T[] takeWhile(T[] self,
 @ClosureParams(Component.class)
 Closure<?> condition)

Returns the longest prefix of this array where each element passed to the given closure evaluates to true.

 def nums = [ 1, 3, 2 ] as Integer[]
 assert nums.takeWhile{ it < 1 } == [] as Integer[]
 assert nums.takeWhile{ it < 3 } == [ 1 ] as Integer[]
 assert nums.takeWhile{ it < 4 } == [ 1, 3, 2 ] as Integer[]
 

Parameters:

self - the original array

condition - the closure that must evaluate to true to continue taking elements

Returns:

A prefix of the given array where each element passed to the given closure evaluates to true.

Since:

1.8.7

toList

public static List<Boolean> toList(boolean[] self)

Converts this array to a List of the same size, with each element added to the list.

Parameters:

self - a boolean array

Returns:

A list containing the contents of this array.

Since:

1.6.0

toList

public static List<Byte> toList(byte[] self)

Converts this array to a List of the same size, with each element added to the list.

Parameters:

self - a byte array

Returns:

A list containing the contents of this array.

Since:

1.0

toList

public static List<Character> toList(char[] self)

Converts this array to a List of the same size, with each element added to the list.

Parameters:

self - a char array

Returns:

A list containing the contents of this array.

Since:

1.0

toList

public static List<Short> toList(short[] self)

Converts this array to a List of the same size, with each element added to the list.

Parameters:

self - a short array

Returns:

A list containing the contents of this array.

Since:

1.0

toList

public static List<Integer> toList(int[] self)

Converts this array to a List of the same size, with each element added to the list.

Parameters:

self - an int array

Returns:

A list containing the contents of this array.

Since:

1.0

toList

public static List<Long> toList(long[] self)

Converts this array to a List of the same size, with each element added to the list.

Parameters:

self - a long array

Returns:

A list containing the contents of this array.

Since:

1.0

toList

public static List<Float> toList(float[] self)

Converts this array to a List of the same size, with each element added to the list.

Parameters:

self - a float array

Returns:

A list containing the contents of this array.

Since:

1.0

toList

public static List<Double> toList(double[] self)

Converts this array to a List of the same size, with each element added to the list.

Parameters:

self - a double array

Returns:

A list containing the contents of this array.

Since:

1.0

toList

public static <T> List<T> toList(T[] self)

Converts this array to a List of the same size, with each element added to the list.

Parameters:

self - an object array

Returns:

A mutable list containing the contents of this array.

Since:

1.0

toSet

public static Set<Boolean> toSet(boolean[] self)

Converts this array to a Set, with each unique element added to the set.

 boolean[] array = [true, false, true]
 Set expected = [true, false]
 assert array.toSet() == expected
 

Parameters:

self - a boolean array

Returns:

A set containing the unique contents of this array.

Since:

1.8.0

toSet

public static Set<Byte> toSet(byte[] self)

Converts this array to a Set, with each unique element added to the set.

 byte[] array = [1, 2, 3, 2, 1]
 Set expected = [1, 2, 3]
 assert array.toSet() == expected
 

Parameters:

self - a byte array

Returns:

A set containing the unique contents of this array.

Since:

1.8.0

toSet

public static Set<Character> toSet(char[] self)

Converts this array to a Set, with each unique element added to the set.

 char[] array = 'xyzzy'.chars
 Set expected = ['x', 'y', 'z']
 assert array.toSet() == expected
 

Parameters:

self - a char array

Returns:

A set containing the unique contents of this array.

Since:

1.8.0

toSet

public static Set<Short> toSet(short[] self)

Converts this array to a Set, with each unique element added to the set.

 short[] array = [1, 2, 3, 2, 1]
 Set expected = [1, 2, 3]
 assert array.toSet() == expected
 

Parameters:

self - a short array

Returns:

A set containing the unique contents of this array.

Since:

1.8.0

toSet

public static Set<Integer> toSet(int[] self)

Converts this array to a Set, with each unique element added to the set.

 int[] array = [1, 2, 3, 2, 1]
 Set expected = [1, 2, 3]
 assert array.toSet() == expected
 

Parameters:

self - an int array

Returns:

A set containing the unique contents of this array.

Since:

1.8.0

toSet

public static Set<Long> toSet(long[] self)

Converts this array to a Set, with each unique element added to the set.

 long[] array = [1, 2, 3, 2, 1]
 Set expected = [1, 2, 3]
 assert array.toSet() == expected
 

Parameters:

self - a long array

Returns:

A set containing the unique contents of this array.

Since:

1.8.0

toSet

public static Set<Float> toSet(float[] self)

Converts this array to a Set, with each unique element added to the set.

 float[] array = [1.0f, 2.0f, 3.0f, 2.0f, 1.0f]
 Set expected = [1.0f, 2.0f, 3.0f]
 assert array.toSet() == expected
 

Parameters:

self - a float array

Returns:

A set containing the unique contents of this array.

Since:

1.8.0

toSet

public static Set<Double> toSet(double[] self)

Converts this array to a Set, with each unique element added to the set.

 double[] array = [1.0d, 2.0d, 3.0d, 2.0d, 1.0d]
 Set expected = [1.0d, 2.0d, 3.0d]
 assert array.toSet() == expected
 

Parameters:

self - a double array

Returns:

A set containing the unique contents of this array.

Since:

1.8.0

toSet

public static <T> Set<T> toSet(T[] self)

Converts this array to a Set, with each unique element added to the set.

Parameters:

self - an object array

Returns:

A set containing the unique contents of this array.

Since:

5.0.0

toSorted

public static <T> T[] toSorted(T[] self)

Returns a sorted version of the given array using the supplied comparator.

Parameters:

self - the array to be sorted

Returns:

the sorted array

Since:

2.4.0

See Also:

• toSorted(Object[], Comparator)

toSorted

public static <T> T[] toSorted(T[] self,
 Comparator<? super T> comparator)

Returns a sorted version of the given array using the supplied comparator to determine the resulting order.

 def sumDigitsComparator = [compare: { num1, num2 -> num1.toString().toList()*.toInteger().sum() <=> num2.toString().toList()*.toInteger().sum() }] as Comparator
 Integer[] nums = [9, 44, 222, 7000]
 def result = nums.toSorted(sumDigitsComparator)
 assert result instanceof Integer[]
 assert result == [222, 7000, 44, 9]
 

Parameters:

self - the array to be sorted

comparator - a Comparator used for the comparison

Returns:

the sorted array

Since:

2.4.0

toSorted

public static <T> T[] toSorted(T[] self,
 @ClosureParams(value=FromString.class,options={"T","T,T"})
 Closure<?> closure)

Sorts the elements from this array into a newly created array using the Closure to determine the correct ordering.

If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

Parameters:

self - the array containing the elements to be sorted

closure - a Closure used to determine the correct ordering

Returns:

a sorted array

Since:

2.4.0

See Also:

• toSorted(Object[], Comparator)

toSpreadMap

public static SpreadMap toSpreadMap(Object[] self)

Creates a spreadable map from this array.

Parameters:

self - an object array

Returns:

a newly created SpreadMap

Since:

1.0

See Also:

• SpreadMap(java.lang.Object[])

toString

public static String toString(boolean[] self)

Returns the string representation of the given array.

 boolean[] array = [false, true, false]
 assert array.toString() == '[false, true, false]'
 

Parameters:

self - an array

Returns:

the string representation

Since:

1.6.0

toString

public static String toString(byte[] self)

Returns the string representation of the given array.

 byte[] array = [1, 2, 3, 2, 1]
 assert array.toString() == '[1, 2, 3, 2, 1]'
 

Parameters:

self - an array

Returns:

the string representation

Since:

1.6.0

toString

public static String toString(char[] self)

Returns the string representation of the given array.

 char[] array = 'abcd'.chars
 assert array instanceof char[]
 assert array.toString() == 'abcd'
 

Parameters:

self - an array

Returns:

the string representation

Since:

1.6.0

toString

public static String toString(short[] self)

Returns the string representation of the given array.

 short[] array = [1, 2, 3, 2, 1]
 assert array.toString() == '[1, 2, 3, 2, 1]'
 

Parameters:

self - an array

Returns:

the string representation

Since:

1.6.0

toString

public static String toString(int[] self)

Returns the string representation of the given array.

 int[] array = [1, 2, 3, 2, 1]
 assert array.toString() == '[1, 2, 3, 2, 1]'
 

Parameters:

self - an array

Returns:

the string representation

Since:

1.6.0

toString

public static String toString(long[] self)

Returns the string representation of the given array.

 long[] array = [1, 2, 3, 2, 1]
 assert array.toString() == '[1, 2, 3, 2, 1]'
 

Parameters:

self - an array

Returns:

the string representation

Since:

1.6.0

toString

public static String toString(float[] self)

Returns the string representation of the given array.

 float[] array = [1, 2, 3, 2, 1]
 assert array.toString() == '[1.0, 2.0, 3.0, 2.0, 1.0]'
 

Parameters:

self - an array

Returns:

the string representation

Since:

1.6.0

toString

public static String toString(double[] self)

Returns the string representation of the given array.

 double[] array = [1, 2, 3, 2, 1]
 assert array.toString() == '[1.0, 2.0, 3.0, 2.0, 1.0]'
 

Parameters:

self - an array

Returns:

the string representation

Since:

1.6.0

toString

public static String toString(Object[] self)

Returns the string representation of the given array.

Parameters:

self - an array

Returns:

the string representation

Since:

1.0

toUnique

public static <T> T[] toUnique(T[] self)

Returns a new Array containing the items from the original Array but with duplicates removed using the natural ordering of the items in the array.

 String[] letters = ['c', 'a', 't', 's', 'a', 't', 'h', 'a', 't']
 String[] expected = ['c', 'a', 't', 's', 'h']
 def result = letters.toUnique()
 assert result == expected
 assert result.class.componentType == String
 

Parameters:

self - an array

Returns:

the unique items from the array

toUnique

public static <T> T[] toUnique(T[] self,
 Comparator<? super T> comparator)

Returns a new Array containing the items from the original Array but with duplicates removed with the supplied comparator determining which items are unique.

 String[] letters = ['c', 'a', 't', 's', 'A', 't', 'h', 'a', 'T']
 String[] lower = ['c', 'a', 't', 's', 'h']
 class LowerComparator implements Comparator {
     int compare(a, b) { a.toLowerCase() <=> b.toLowerCase() }
 }
 assert letters.toUnique(new LowerComparator()) == lower
 

Parameters:

self - an array

comparator - a Comparator used to determine unique (equal) items If null, the Comparable natural ordering of the elements will be used.

Returns:

the unique items from the array

toUnique

public static <T> T[] toUnique(T[] self,
 @ClosureParams(value=FromString.class,options={"T","T,T"})
 Closure<?> closure)

Returns a new Array containing the items from the original Array but with duplicates removed with the supplied closure determining which items are unique.

 String[] letters = ['c', 'a', 't', 's', 'A', 't', 'h', 'a', 'T']
 String[] expected = ['c', 'a', 't', 's', 'h']
 assert letters.toUnique{ p1, p2 -> p1.toLowerCase() <=> p2.toLowerCase() } == expected
 assert letters.toUnique{ it.toLowerCase() } == expected
 

Parameters:

self - an array

closure - a Closure used to determine unique items

Returns:

the unique items from the array

transpose

public static boolean[][] transpose(boolean[][] self)

A transpose method for 2D boolean arrays.

Example usage:

 boolean[][] array = [[false, false], [true, true]]
 boolean[][] expected = [[false, true], [false, true]]
 def result = array.transpose()
 assert result == expected
 assert array.class.componentType == result.class.componentType
 

Parameters:

self - a 2D boolean array

Returns:

the transposed 2D boolean array

Since:

5.0.0

transpose

public static byte[][] transpose(byte[][] self)

A transpose method for 2D byte arrays.

Example usage:

 byte[][] bytes = [[1, 10], [2, 20]]
 byte[][] expected = [[1, 2], [10, 20]]
 def result = bytes.transpose()
 assert result == expected
 assert bytes.class.componentType == result.class.componentType
 

Parameters:

self - a 2D byte array

Returns:

the transposed 2D byte array

Since:

5.0.0

transpose

public static char[][] transpose(char[][] self)

A transpose method for 2D char arrays.

Example usage:

 char[][] chars = [['a', 'b'], ['A', 'B']]
 char[][] expected = [['a', 'A'], ['b', 'B']]
 def result = chars.transpose()
 assert result == expected
 assert chars.class.componentType == result.class.componentType
 

Parameters:

self - a 2D char array

Returns:

the transposed 2D char array

Since:

5.0.0

transpose

public static short[][] transpose(short[][] self)

A transpose method for 2D short arrays.

Example usage:

 short[][] shorts = [[1, 10], [100, 1000]]
 short[][] expected = [[1, 100], [10, 1000]]
 def result = shorts.transpose()
 assert result == expected
 assert shorts.class.componentType == result.class.componentType
 

Parameters:

self - a 2D short array

Returns:

the transposed 2D short array

Since:

5.0.0

transpose

public static int[][] transpose(int[][] self)

A transpose method for 2D int arrays.

Example usage:

 int[][] nums = [[10, 15, 20], [30, 35, 40]]
 int[][] expected = [[10, 30], [15, 35], [20, 40]]
 assert nums.transpose() == expected
 

Parameters:

self - a 2D int array

Returns:

the transposed 2D int array

Since:

3.0.8

transpose

public static long[][] transpose(long[][] self)

A transpose method for 2D long arrays.

Example usage:

 long[][] longs = [[1L, 3L, 5L], [2L, 4L, 6L]]
 long[][] expected = [[1L, 2L], [3L, 4L], [5L, 6L]]
 def result = longs.transpose()
 assert result == expected
 assert longs.class.componentType == result.class.componentType
 

Parameters:

self - a 2D long array

Returns:

the transposed 2D long array

Since:

3.0.8

transpose

public static float[][] transpose(float[][] self)

A transpose method for 2D float arrays.

Example usage:

 float[][] floats = [[1.0f, 10.0f], [2.0f, 20.0f]]
 float[][] expected = [[1.0f, 2.0f], [10.0f, 20.0f]]
 def result = floats.transpose()
 assert result == expected
 assert floats.class.componentType == result.class.componentType
 

Parameters:

self - a 2D float array

Returns:

the transposed 2D float array

Since:

5.0.0

transpose

public static double[][] transpose(double[][] self)

A transpose method for 2D double arrays.

Example usage:

 double[][] doubles = [[1.0d, 10.0d], [2.0d, 20.0d]]
 double[][] expected = [[1.0d, 2.0d], [10.0d, 20.0d]]
 def result = doubles.transpose()
 assert result == expected
 assert doubles.class.componentType == result.class.componentType
 

Parameters:

self - a 2D double array

Returns:

the transposed 2D double array

Since:

3.0.8

union

public static Object[] union(Object[] left,
 Collection<?> right)

Creates an object array containing elements from an original array plus those from a Collection. This is similar to plus(Object[], Collection) but always return an Object array and so might be more applicable when adding heterogeneous arrays.

 Integer[] a = [1, 2, 3]
 def result = a.union(['foo', 'bar'])
 assert result.class == Object[]
 assert result == new Object[]{1, 2, 3, 'foo', 'bar'}
 

Parameters:

left - the array

right - a Collection to be appended

Returns:

A new Object array containing left with right appended to it.

Since:

4.0.0

union

public static Object[] union(Object[] left,
 Iterable<?> right)

Creates an Object array containing elements from an original array plus those from an Iterable. This is similar to plus(Object[], Iterable) but always return an Object array and so might be more applicable when adding heterogeneous arrays.

 class AbcIterable implements Iterable {
     Iterator iterator() { "abc".iterator() }
 }
 String[] array = ['x', 'y', 'z']
 def result = array.union(new AbcIterable())
 assert result.class == Object[]
 assert result == new Object[]{'x', 'y', 'z', 'a', 'b', 'c'}
 

Parameters:

left - the array

right - an Iterable to be appended

Returns:

A new Object array containing elements from left with those from right appended.

Since:

4.0.0

union

public static Object[] union(Object[] left,
 Object[] right)

Creates an Object array as a union of two arrays. This is similar to plus(Object[], Object[]) but always return an Object array and so might be more applicable when adding heterogeneous arrays.

 Integer[] a = [1, 2, 3]
 String[] b = ['foo', 'bar']
 def result = a.union(b)
 assert result.class == Object[]
 assert result == new Object[]{1, 2, 3, 'foo', 'bar'}
 

Parameters:

left - the left Array

right - the right Array

Returns:

A new Object array containing right appended to left.

Since:

4.0.0

union

public static Object[] union(Object[] left,
 Object right)

Creates an Object array containing elements from an original array plus an additional appended element. This is similar to plus(Object[], Object) but always return an Object array and so might be more applicable when adding heterogeneous arrays.

 Integer[] a = [1, 2, 3]
 def result = a.union('foo')
 assert result.class == Object[]
 assert result == new Object[]{1, 2, 3, 'foo'}
 

Parameters:

left - the array

right - the value to append

Returns:

A new Object array containing left with right appended to it.

Since:

4.0.0

withCollectedKeys

public static <K,
V> Map<K,V> withCollectedKeys(V[] values,
 Function<? super V,K> keyTransform)

A variant of withCollectedKeys for arrays.

Parameters:

values - an array

keyTransform - a function for transforming array elements into values

Returns:

the collector with all transformed values added to it

Since:

5.0.0

See Also:

• DefaultGroovyMethods.withCollectedKeys(Iterable, Function)

withCollectedKeys

public static <K,
V> Map<K,V> withCollectedKeys(V[] values,
 Map<K,V> collector,
 Function<? super V,K> keyTransform)

A variant of withCollectedKeys for arrays.

Parameters:

values - an array

collector - the Map into which the transformed entries are put

keyTransform - a function for transforming array elements into values

Returns:

the collector with all transformed values added to it

Since:

5.0.0

See Also:

• DefaultGroovyMethods.withCollectedKeys(Iterable, Map, Function)

withCollectedValues

public static <K,
V> Map<K,V> withCollectedValues(K[] keys,
 Function<? super K,V> valueTransform)

A variant of withCollectedValues for arrays.

Parameters:

keys - an array

valueTransform - a function for transforming array elements into values

Returns:

A map of the transformed entries.

Since:

5.0.0

withCollectedValues

public static <K,
V> Map<K,V> withCollectedValues(K[] keys,
 Map<K,V> collector,
 Function<? super K,V> valueTransform)

A variant of withCollectedValues for arrays.

Parameters:

keys - an array

collector - the Map into which the transformed entries are put

valueTransform - a function for transforming array elements into values

Returns:

The collector with all transformed values added to it.

Since:

5.0.0