public class GroovyCollections extends Object
| Constructor and Description |
|---|
GroovyCollections() |
| Modifier and Type | Method and Description |
|---|---|
static List |
combinations(Collection collections)
Finds all combinations of items from the given collections.
|
static List |
combinations(Object[] collections)
Finds all combinations of items from the given collections.
|
static <T> T |
max(Collection<T> items)
Selects the maximum value found in a collection
|
static <T> T |
max(T[] items)
Selects the maximum value found in an array of items, so
min([2, 4, 6] as Object[]) == 6.
|
static <T> T |
min(Collection<T> items)
Selects the minimum value found in a collection of items.
|
static <T> T |
min(T[] items)
Selects the minimum value found in an array of items, so
min([2, 4, 6] as Object[]) == 2.
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static <T> Set<List<T>> |
subsequences(List<T> items)
Finds all non-null subsequences of a list.
|
static Object |
sum(Collection items)
Sums all the items from a collection of items.
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static Object |
sum(Object[] items)
Sums all the items from an array of items.
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static List |
transpose(List lists)
Transposes the given lists.
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static List |
transpose(Object[] lists)
Transposes an array of lists.
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public static List combinations(Object[] collections)
collections - the given collectionscombinations(Collection)public static <T> Set<List<T>> subsequences(List<T> items)
subsequences([1, 2, 3]) would be:
[[1, 2, 3], [1, 3], [2, 3], [1, 2], [1], [2], [3]]items - the List of itemspublic static List combinations(Collection collections)
combinations([[true, false], [true, false]])
is [[true, true], [false, true], [true, false], [false, false]]
and combinations([['a', 'b'],[1, 2, 3]])
is [['a', 1], ['b', 1], ['a', 2], ['b', 2], ['a', 3], ['b', 3]].
If a non-collection item is given, it is treated as a singleton collection,
i.e. combinations([[1, 2], 'x']) is [[1, 'x'], [2, 'x']].collections - the given collectionspublic static List transpose(Object[] lists)
lists - the given liststranspose(List)public static List transpose(List lists)
transpose([['a', 'b'], [1, 2]])
is [['a', 1], ['b', 2]] and
transpose([['a', 'b', 'c']])
is [['a'], ['b'], ['c']].lists - the given listspublic static <T> T min(T[] items)
items - an array of itemspublic static <T> T min(Collection<T> items)
items - a Collectionpublic static <T> T max(T[] items)
items - an array of itemspublic static <T> T max(Collection<T> items)
items - a Collectionpublic static Object sum(Object[] items)
items - an array of itemspublic static Object sum(Collection items)
items - a collection of items