Object[] (Groovy JDK enhancements)

Methods Summary

Methods
Return type	Name and parameters
`boolean`	`asBoolean()` Coerce an Object array to a boolean value.
`Object`	`asType(Class clazz)` Converts the given array to either a List, Set, or SortedSet.
`Map`	`collectEntries()` A variant of collectEntries using the identity closure as the transform.
`Map`	`collectEntries(Closure transform)` Iterates through this array transforming each item using the `transform` closure and returning a map of the resulting transformed entries.
`Map`	`collectEntries(Map collector)` A variant of collectEntries using the identity closure as the transform.
`Map`	`collectEntries(Map collector, Closure transform)` Iterates through this array transforming each item using the `transform` closure and returning a map of the resulting transformed entries.
`List`	`collectMany(Closure projection)` Projects each item from a source array to a collection and concatenates (flattens) the resulting collections into a single list.
`boolean`	`contains(Object value)` Checks whether the array contains the given value.
`Number`	`count(Closure closure)` Counts the number of occurrences which satisfy the given closure from inside this array.
`Number`	`count(Object value)` Counts the number of occurrences of the given value inside this array.
`Map`	`countBy(Closure closure)` Sorts all array members into groups determined by the supplied mapping closure and counts the group size.
`Object[]`	`drop(int num)` Drops the given number of elements from the head of this array if they are available.
`Object[]`	`dropWhile(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.
`boolean`	`equals(List right)` Determines if the contents of this array are equal to the contents of the given list, in the same order.
`Object`	`find(Closure condition)` Finds the first element in the array that matches the given closure condition.
`Collection`	`findAll()` Finds the elements of the array matching the IDENTITY Closure (i.e. matching Groovy truth).
`Collection`	`findAll(Closure condition)` Finds all elements of the array matching the given Closure condition.
`Object`	`first()` Returns the first item from the array.
`Collection`	`flatten()` Flatten an array.
`List`	`getAt(EmptyRange range)`
`List`	`getAt(IntRange range)`
`List`	`getAt(ObjectRange range)`
`List`	`getAt(Range range)` Support the range subscript operator for an Array
`List`	`getAt(Collection indices)` Select a List of items from an Object array using a Collection to identify the indices to be selected.
`Collection`	`grep()` Iterates over the array returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.
`Collection`	`grep(Object filter)` Iterates over the array of items and returns a collection of items that match the given filter - calling the `Object#isCase(java.lang.Object)` method used by switch statements.
`Map`	`groupBy(Closure closure)` Sorts all array members into groups determined by the supplied mapping closure.
`Map`	`groupBy(Object closures)` Sorts all array members into (sub)groups determined by the supplied mapping closures as per the Iterable variant of this method.
`Map`	`groupBy(List closures)` Sorts all array members into (sub)groups determined by the supplied mapping closures as per the list variant of this method.
`Object`	`head()` Returns the first item from the Object array.
`Object`	`inject(Closure closure)` Iterates through the given array as with inject(Object[],initialValue,closure), but using the first element of the array as the initialValue, and then iterating the remaining elements of the array.
`Object`	`inject(Object initialValue, Closure closure)` Iterates through the given array, passing in the initial value to the closure along with the first item.
`Iterator`	`iterator()` Attempts to create an Iterator for the given object by first converting it to a Collection.
`String`	`join(String separator)` Concatenates the `toString()` representation of each items in this array, with the given String as a separator between each item.
`Object`	`last()` Returns the last item from the array.
`Object`	`max()` Adds max() method to Object arrays.
`Object`	`max(Closure closure)` Selects the maximum value found from the Object array using the closure to determine the correct ordering.
`Object`	`max(Comparator comparator)` Selects the maximum value found from the Object array using the given comparator.
`Object`	`min()` Adds min() method to Object arrays.
`Object`	`min(Closure closure)` Selects the minimum value found from the Object array using the closure to determine the correct ordering.
`Object`	`min(Comparator comparator)` Selects the minimum value found from the Object array using the given comparator.
`Object[]`	`minus(Iterable removeMe)` Create an array composed of the elements of the first array minus the elements of the given Iterable.
`Object[]`	`minus(Object removeMe)` Create a new object array composed of the elements of the first array minus the element to remove.
`Object[]`	`minus(Object[] removeMe)` Create an array composed of the elements of the first array minus the elements of the given array.
`Object[]`	`plus(Iterable right)` Create an array containing elements from an original array plus those from an Iterable.
`Object[]`	`plus(Object right)` Create an array containing elements from an original array plus an additional appended element.
`Object[]`	`plus(Object[] right)` Create an array as a union of two arrays.
`Object[]`	`plus(Collection right)` Create an array containing elements from an original array plus those from a Collection.
`Object[]`	`reverse()` Creates a new array containing items which are the same as this array but in reverse order.
`Object[]`	`reverse(boolean mutate)` Reverse the items in an array.
`Object[]`	`reverseEach(Closure closure)` Iterate over each element of the array in the reverse order.
`int`	`size()` Provide the standard Groovy `size()` method for an array.
`Object[]`	`sort()` Modifies this array so that its elements are in sorted order.
`Object[]`	`sort(boolean mutate)` Sorts the given array into sorted order.
`Object[]`	`sort(boolean mutate, Closure closure)` Modifies this array so that its elements are in sorted order using the Closure to determine the correct ordering.
`Object[]`	`sort(boolean mutate, Comparator comparator)` Modifies this array so that its elements are in sorted order as determined by the given comparator.
`Object[]`	`sort(Closure closure)` Sorts the elements from this array into a newly created array using the Closure to determine the correct ordering.
`Object[]`	`sort(Comparator comparator)` Sorts the given array into sorted order using the given comparator.
`Object`	`sum()` Sums the items in an array.
`Object`	`sum(Closure closure)` Sums the result of apply a closure to each item of an array.
`Object`	`sum(Object initialValue)` Sums the items in an array, adding the result to some initial value.
`Object`	`sum(Object initialValue, Closure closure)` Sums the result of applying a closure to each item of an array to some initial value.
`Object[]`	`tail()` Returns the items from the Object array excluding the first item.
`Object[]`	`take(int num)` Returns the first `num` elements from the head of this array.
`Object[]`	`takeWhile(Closure condition)` Returns the longest prefix of this array where each element passed to the given closure evaluates to true.
`String`	`toArrayString()` Returns the string representation of the given array.
`List`	`toList()` Allows conversion of arrays into a mutable List.
`SpreadMap`	`toSpreadMap()` Creates a spreadable map from this array.
`String`	`toString()` Returns the string representation of this array's contents.

- Methods Detail
  - public boolean asBoolean()
    
    Coerce an Object array to a boolean value. An Object array is false if the array is of length 0. and to true otherwise
    
    Returns:
    
    the boolean value
    
    Since:
    
    1.7.0
  - public Object asType(Class clazz)
    
    Converts the given array to either a List, Set, or SortedSet. If the given class is something else, the call is deferred to {link #asType(Object,Class)}.
    
    Parameters:
    
    clazz - the desired class
    
    Returns:
    
    the object resulting from this type conversion
    
    Since:
    
    1.5.1
    
    See Also:
    
    Object#asType(java.lang.Class)
  - public Map collectEntries()
    
    A variant of collectEntries using the identity closure as the transform.
    
    Returns:
    
    the collector with all transformed values added to it
    
    Since:
    
    1.8.5
    
    See Also:
    
    Object[]#collectEntries(Closure)
  - public Map collectEntries(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:
    
    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:
    
    Iterable#collectEntries(Map, Closure)
  - public Map collectEntries(Map collector)
    
    A variant of collectEntries using the identity closure as the transform.
    
    Parameters:
    
    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:
    
    Object[]#collectEntries(Map, Closure)
  - public Map collectEntries(Map collector, 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:
    
    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:
    
    Map#collect(Collection, Closure)
  - public List collectMany(Closure 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:
    
    projection - a projecting Closure returning a collection of items
    
    Returns:
    
    a list created from the projected collections concatenated (flattened) together
    
    Since:
    
    1.8.1
    
    See Also:
    
    Object[]#sum(groovy.lang.Closure)
  - public boolean contains(Object value)
    
    Checks whether the array contains the given value.
    
    Parameters:
    
    value - the value being searched for
    
    Returns:
    
    true if the array contains the value
    
    Since:
    
    1.8.6
  - public Number count(Closure closure)
    
    Counts the number of occurrences which satisfy the given closure from inside this array.
    
    Parameters:
    
    closure - a closure condition
    
    Returns:
    
    the number of occurrences
    
    Since:
    
    1.8.0
  - public Number count(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:
    
    value - the value being searched for
    
    Returns:
    
    the number of occurrences
    
    Since:
    
    1.6.4
  - public Map countBy(Closure 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:
    
    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:
    
    Collection#countBy(Closure)
  - public Object[] drop(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:
    
    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
  - public Object[] dropWhile(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:
    
    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
  - public boolean equals(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:
    
    right - the List being compared
    
    Returns:
    
    true if the contents of both collections are equal
    
    Since:
    
    1.5.0
  - public Object find(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:
    
    condition - a closure condition
    
    Returns:
    
    the first element from the array that matches the condition or null if no element matches
    
    Since:
    
    2.0
  - public Collection findAll()
    
    Finds the elements of the array matching the IDENTITY Closure (i.e. matching Groovy truth).
    Example:
```
def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null] as Object[]
assert items.findAll() == [1, 2, true, 'foo', [4, 5]]
```
    Returns:
    
    a collection of the elements found
    
    Since:
    
    2.0
    
    See Also:
    
    Closure#IDENTITY
  - public Collection findAll(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:
    
    condition - a closure condition
    
    Returns:
    
    a list of matching values
    
    Since:
    
    2.0
  - public Object first()
    
    Returns the first item from the array.
```
def array = [3, 4, 2].toArray()
assert array.first() == 3
```
    Returns:
    
    the first item from the array
    
    Since:
    
    1.7.3
  - public Collection flatten()
    
    Flatten an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.
    
    Returns:
    
    a flattened Collection
    
    Since:
    
    1.6.0
  - public List getAt(EmptyRange range)
    
    Parameters:
    
    range - an EmptyRange
    
    Returns:
    
    an empty Range
    
    Since:
    
    1.5.0
  - public List getAt(IntRange range)
    
    Parameters:
    
    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
  - public List getAt(ObjectRange range)
    
    Parameters:
    
    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
  - public List getAt(Range range)
    
    Support the range subscript operator for an Array
    
    Parameters:
    
    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
  - public List getAt(Collection indices)
    
    Select a List of items from an Object array using a Collection to identify the indices to be selected.
    
    Parameters:
    
    indices - a Collection of indices
    
    Returns:
    
    a new list of the values at the given indices
    
    Since:
    
    1.0
  - public Collection grep()
    
    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]]
```
    Returns:
    
    a collection of elements which satisfy Groovy truth
    
    Since:
    
    2.0
    
    See Also:
    
    Closure#IDENTITY
  - public Collection grep(Object filter)
    
    Iterates over the array of items and returns a collection of items that match the given filter - calling the Object#isCase(java.lang.Object) method used by switch statements. This method can be used with different kinds of filters like regular expressions, classes, ranges etc. Example:
```
def list = ['a', 'b', 'aa', 'bc', 3, 4.5] as Object[]
assert list.grep( ~/a+/ )  == ['a', 'aa']
assert list.grep( ~/../ )  == ['aa', 'bc']
assert list.grep( Number ) == [ 3, 4.5 ]
assert list.grep{ it.toString().size() == 1 } == [ 'a', 'b', 3 ]
```
    Parameters:
    
    filter - the filter to perform on each element of the array (using the Object#isCase(java.lang.Object) method)
    
    Returns:
    
    a collection of objects which match the filter
    
    Since:
    
    2.0
  - public Map groupBy(Closure 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:
    
    closure - a closure mapping entries on keys
    
    Returns:
    
    a new Map grouped by keys
    
    Since:
    
    2.2.0
    
    See Also:
    
    Iterable#groupBy(Closure)
  - public Map groupBy(Object closures)
    
    Sorts all array members into (sub)groups determined by the supplied mapping closures as per the Iterable variant of this method.
    
    Parameters:
    
    closures - an array of closures, each mapping entries on keys
    
    Returns:
    
    a new Map grouped by keys on each criterion
    
    Since:
    
    2.2.0
    
    See Also:
    
    Iterable#groupBy(Object...)
    
    Closure#IDENTITY
  - public Map groupBy(List closures)
    
    Sorts all array members into (sub)groups determined by the supplied mapping closures as per the list variant of this method.
    
    Parameters:
    
    closures - a list of closures, each mapping entries on keys
    
    Returns:
    
    a new Map grouped by keys on each criterion
    
    Since:
    
    2.2.0
    
    See Also:
    
    Closure#IDENTITY
    
    Iterable#groupBy(List)
  - public Object head()
    
    Returns the first item from the Object array.
```
def array = [3, 4, 2].toArray()
assert array.head() == 3
```
    Returns:
    
    the first item from the Object array
    
    Since:
    
    1.7.3
  - public Object inject(Closure closure)
    
    Iterates through the given array as with inject(Object[],initialValue,closure), but using the first element of the array as the initialValue, and then iterating the remaining elements of the array.
    
    Parameters:
    
    closure - a closure
    
    Returns:
    
    the result of the last closure call
    
    Since:
    
    1.8.7
    
    See Also:
    
    Object[]#inject(Object, Closure)
  - public Object inject(Object initialValue, Closure closure)
    
    Iterates through the given array, passing in the initial value to the closure along with the first item. The result is passed back (injected) into the closure along with the second item. The new result is injected back into the closure along with the third item and so on until all elements of the array have been used. Also known as foldLeft in functional parlance.
    
    Parameters:
    
    initialValue - some initial value
    
    closure - a closure
    
    Returns:
    
    the result of the last closure call
    
    Since:
    
    1.5.0
    
    See Also:
    
    Collection#inject(Object, Closure)
  - public Iterator iterator()
    
    Attempts to create an Iterator for the given object by first converting it to a Collection.
    
    Returns:
    
    an Iterator for the given Array.
    
    Since:
    
    1.6.4
    
    See Also:
    
    DefaultTypeTransformation#asCollection(java.lang.Object[])
  - public String join(String separator)
    
    Concatenates the toString() representation of each items in this array, with the given String as a separator between each item.
    
    Parameters:
    
    separator - a String separator
    
    Returns:
    
    the joined String
    
    Since:
    
    1.0
  - public Object last()
    
    Returns the last item from the array.
```
def array = [3, 4, 2].toArray()
assert array.last() == 2
```
    Returns:
    
    the last item from the array
    
    Since:
    
    1.7.3
  - public Object max()
    
    Adds max() method to Object arrays.
    
    Returns:
    
    the maximum value
    
    Since:
    
    1.5.5
    
    See Also:
    
    Collection#max()
  - public Object max(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:
    
    closure - a Closure used to determine the correct ordering
    
    Returns:
    
    the maximum value
    
    Since:
    
    1.5.5
    
    See Also:
    
    Collection#max(groovy.lang.Closure)
  - public Object max(Comparator comparator)
    
    Selects the maximum value found from the Object array using the given comparator.
    
    Parameters:
    
    comparator - a Comparator
    
    Returns:
    
    the maximum value
    
    Since:
    
    1.5.5
  - public Object min()
    
    Adds min() method to Object arrays.
    
    Returns:
    
    the minimum value
    
    Since:
    
    1.5.5
    
    See Also:
    
    Collection#min()
  - public Object min(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:
    
    closure - a Closure used to determine the correct ordering
    
    Returns:
    
    the minimum value
    
    Since:
    
    1.5.5
    
    See Also:
    
    Collection#min(groovy.lang.Closure)
  - public Object min(Comparator comparator)
    
    Selects the minimum value found from the Object array using the given comparator.
    
    Parameters:
    
    comparator - a Comparator
    
    Returns:
    
    the minimum value
    
    Since:
    
    1.5.5
    
    See Also:
    
    Collection#min(java.util.Comparator)
  - public Object[] minus(Iterable removeMe)
    
    Create an array composed of the elements of the first array minus the elements of the given Iterable.
    
    Parameters:
    
    removeMe - a Collection of elements to remove
    
    Returns:
    
    an array with the supplied elements removed
    
    Since:
    
    1.5.5
  - public Object[] minus(Object removeMe)
    
    Create a new object array composed of the elements of the first array minus the element to remove.
    
    Parameters:
    
    removeMe - an element to remove from the array
    
    Returns:
    
    a new array with the operand removed
    
    Since:
    
    1.5.5
  - public Object[] minus(Object[] removeMe)
    
    Create an array composed of the elements of the first array minus the elements of the given array.
    
    Parameters:
    
    removeMe - an array of elements to remove
    
    Returns:
    
    an array with the supplied elements removed
    
    Since:
    
    1.5.5
  - public Object[] plus(Iterable right)
    
    Create an array containing elements from an original array plus those from an Iterable.
```
class AbcIterable implements Iterable {
    Iterator iterator() { "abc".iterator() }
}
String[] letters = ['x', 'y', 'z']
def result = letters + new AbcIterable()
assert result == ['x', 'y', 'z', 'a', 'b', 'c'] as String[]
assert result.class.array
```
    Parameters:
    
    right - an Iterable to be appended
    
    Returns:
    
    A new array containing elements from left with those from right appended.
    
    Since:
    
    1.8.7
  - public Object[] plus(Object right)
    
    Create an array containing elements from an original array plus an additional appended element.
```
Integer[] a = [1, 2, 3]
Integer[] result = a + 4
assert result == [1, 2, 3, 4] as Integer[]
```
    Parameters:
    
    right - the value to append
    
    Returns:
    
    A new array containing left with right appended to it.
    
    Since:
    
    1.8.7
  - public Object[] plus(Object[] right)
    
    Create an array as a union of two arrays.
```
Integer[] a = [1, 2, 3]
Integer[] b = [4, 5, 6]
assert a + b == [1, 2, 3, 4, 5, 6] as Integer[]
```
    Parameters:
    
    right - the right Array
    
    Returns:
    
    A new array containing right appended to left.
    
    Since:
    
    1.8.7
  - public Object[] plus(Collection right)
    
    Create an array containing elements from an original array plus those from a Collection.
```
Integer[] a = [1, 2, 3]
def additions = [7, 8]
assert a + additions == [1, 2, 3, 7, 8] as Integer[]
```
    Parameters:
    
    right - a Collection to be appended
    
    Returns:
    
    A new array containing left with right appended to it.
    
    Since:
    
    1.8.7
  - public Object[] reverse()
    
    Creates a new array containing items which are the same as this array but in reverse order.
    
    Returns:
    
    an array containing the reversed items
    
    Since:
    
    1.5.5
    
    See Also:
    
    Object[]#reverse(boolean)
  - public Object[] reverse(boolean mutate)
    
    Reverse 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.
    
    Parameters:
    
    mutate - true if the array itself should be reversed in place and returned, false if a new array should be created
    
    Returns:
    
    an array containing the reversed items
    
    Since:
    
    1.8.1
  - public Object[] reverseEach(Closure closure)
    
    Iterate over each element of the array in the reverse order.
    
    Parameters:
    
    closure - a closure to which each item is passed
    
    Returns:
    
    the original array
    
    Since:
    
    1.5.2
  - public int size()
    
    Provide the standard Groovy size() method for an array.
    
    Returns:
    
    the size (length) of the Array
    
    Since:
    
    1.0
  - public Object[] sort()
    
    Modifies this array so that its elements are in sorted order. The array items are assumed to be comparable.
    
    Returns:
    
    the sorted array
    
    Since:
    
    1.5.5
  - public Object[] sort(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:
    
    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
  - public Object[] sort(boolean mutate, 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:
    
    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
  - public Object[] sort(boolean mutate, Comparator 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:
    
    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
  - public Object[] sort(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:
    
    closure - a Closure used to determine the correct ordering
    
    Returns:
    
    the sorted array
    
    Since:
    
    1.5.5
  - public Object[] sort(Comparator comparator)
    
    Sorts the given array into sorted order using the given comparator.
    
    Parameters:
    
    comparator - a Comparator used for the comparison
    
    Returns:
    
    the sorted array
    
    Since:
    
    1.5.5
  - public Object sum()
    
    Sums the items in an array. This is equivalent to invoking the "plus" method on all items in the array.
    
    Returns:
    
    The sum of all of the items
    
    Since:
    
    1.7.1
    
    See Also:
    
    Collection#sum()
  - public Object sum(Closure closure)
    
    Sums the result of apply a closure to each item of an array. array.sum(closure) is equivalent to: array.collect(closure).sum().
    
    Parameters:
    
    closure - a single parameter closure that returns a numeric value.
    
    Returns:
    
    The sum of the values returned by applying the closure to each item of the array.
    
    Since:
    
    1.7.1
  - public Object sum(Object initialValue)
    
    Sums the items in an array, adding the result to some initial value.
    
    Parameters:
    
    initialValue - the items in the array will be summed to this initial value
    
    Returns:
    
    The sum of all of the items.
    
    Since:
    
    1.7.1
  - public Object sum(Object initialValue, 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:
    
    closure - a single parameter closure that returns a 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
  - public Object[] tail()
    
    Returns the items from the Object array excluding the first item.
```
    String[] strings = ["a", "b", "c"]
    def result = strings.tail()
    assert strings.class.componentType == String
```
    Returns:
    
    an Object array without its first element
    
    Since:
    
    1.7.3
  - public Object[] take(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:
    
    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 then num elements.
    
    Since:
    
    1.8.1
  - public Object[] takeWhile(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:
    
    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
  - public String toArrayString()
    
    Returns the string representation of the given array. The string displays the contents of the array, similar to an array literal, i.e. {1, 2, "a"}.
    
    Returns:
    
    the string representation
    
    Since:
    
    1.0
  - public List toList()
    
    Allows conversion of arrays into a mutable List.
    
    Returns:
    
    the array as a List
    
    Since:
    
    1.0
  - public SpreadMap toSpreadMap()
    
    Creates a spreadable map from this array.
    
    Returns:
    
    a newly created SpreadMap
    
    Since:
    
    1.0
    
    See Also:
    
    SpreadMap#SpreadMap(java.lang.Object[])
    
    Map#toSpreadMap()
  - public String toString()
    
    Returns the string representation of this array's contents.
    
    Returns:
    
    the string representation
    
    Since:
    
    1.0
    
    See Also:
    
    Object[]#toArrayString()

Class Object[]

Methods Summary

Methods Detail

public boolean asBoolean()

public Object asType(Class clazz)

public Map collectEntries()

public Map collectEntries(Closure transform)

public Map collectEntries(Map collector)

public Map collectEntries(Map collector, Closure transform)

public List collectMany(Closure projection)

public boolean contains(Object value)

public Number count(Closure closure)

public Number count(Object value)

public Map countBy(Closure closure)

public Object[] drop(int num)

public Object[] dropWhile(Closure condition)

public boolean equals(List right)

public Object find(Closure condition)

public Collection findAll()

public Collection findAll(Closure condition)

public Object first()

public Collection flatten()

public List getAt(EmptyRange range)

public List getAt(IntRange range)

public List getAt(ObjectRange range)

public List getAt(Range range)

public List getAt(Collection indices)

public Collection grep()

public Collection grep(Object filter)

public Map groupBy(Closure closure)

public Map groupBy(Object closures)

public Map groupBy(List closures)

public Object head()

public Object inject(Closure closure)

public Object inject(Object initialValue, Closure closure)

public Iterator iterator()

public String join(String separator)

public Object last()

public Object max()

public Object max(Closure closure)

public Object max(Comparator comparator)

public Object min()

public Object min(Closure closure)

public Object min(Comparator comparator)

public Object[] minus(Iterable removeMe)

public Object[] minus(Object removeMe)

public Object[] minus(Object[] removeMe)

public Object[] plus(Iterable right)

public Object[] plus(Object right)

public Object[] plus(Object[] right)

public Object[] plus(Collection right)

public Object[] reverse()

public Object[] reverse(boolean mutate)

public Object[] reverseEach(Closure closure)

public int size()

public Object[] sort()

public Object[] sort(boolean mutate)

public Object[] sort(boolean mutate, Closure closure)

public Object[] sort(boolean mutate, Comparator comparator)

public Object[] sort(Closure closure)

public Object[] sort(Comparator comparator)

public Object sum()

public Object sum(Closure closure)

public Object sum(Object initialValue)

public Object sum(Object initialValue, Closure closure)

public Object[] tail()

public Object[] take(int num)

public Object[] takeWhile(Closure condition)

public String toArrayString()

public List toList()

public SpreadMap toSpreadMap()

public String toString()