Package: java.lang

## Class Object[]

- - ### Methods Summary

    Methods
    Return type | Name and parameters
    --- | ---
    `boolean` | `any(Closure predicate)` Iterates over the contents of an Array, and checks whether a predicate is valid for at least one element.
    `boolean` | `asBoolean()` Coerces an object array to a boolean value.
    `Object` | `asType(Class type)` Converts the given array to either a List, Set, or SortedSet.
    `Object` | `average()` Averages the items in an array.
    `Object` | `average(Closure closure)` Averages the result of applying a closure to each item of an array.
    `List` | `chop(int chopSizes)` Chops the array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
    `List` | `collate(int size)` Collates an array.
    `List` | `collate(int size, boolean keepRemainder)` Collates this array into sub-lists.
    `List` | `collate(int size, int step)` Collates an array into sub-lists.
    `List` | `collate(int size, int step, boolean keepRemainder)` Collates this array into sub-lists.
    `List` | `collect(Closure transform)` Iterates through this Array transforming each item into a new value using the `transform` closure, returning a list of transformed values.
    `Object` | `collect(Object collector, Closure transform)` Iterates through this Array transforming each item into a new value using the `transform` closure and adding it to the supplied `collector`.
    `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.
    `Map` | `collectEntries(Map collector, Function keyTransform, Function valueTransform)` A variant of collectEntries for arrays with separate functions for transforming the keys and values.
    `Map` | `collectEntries(Function keyTransform, Function valueTransform)` A variant of collectEntries for arrays with separate functions for transforming the keys and values.
    `List` | `collectMany(Closure projection)` Projects each item from a source array to a collection and concatenates (flattens) the resulting collections into a single list.
    `Object` | `collectMany(Object collector, 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 predicate)` 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()` Creates a multiset-like map of the array members.
    `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[]` | `dropRight(int num)` Drops the given number of elements from the tail 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.
    `Object[]` | `each(Closure closure)` Iterates through an array passing each array entry to the given closure.
    `Object[]` | `eachWithIndex(Closure closure)` Iterates through an array, passing each array element and the element's index (a counter starting at zero) to the given closure.
    `boolean` | `equals(List right)` Determines if the contents of this array are equal to the contents of the given list, in the same order.
    `boolean` | `every(Closure predicate)` Used to determine if the given predicate closure is valid (i.e. returns `true` for all items in this Array).
    `Object` | `find(Closure condition)` Finds the first element in the array that matches the given closure condition.
    `List` | `findAll()` Finds the elements of the array matching the IDENTITY Closure (i.e. matching Groovy truth).
    `List` | `findAll(Closure condition)` Finds all elements of the array matching the given Closure condition.
    `int` | `findIndexOf(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.
    `int` | `findIndexOf(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.
    `List` | `findIndexValues(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.
    `List` | `findIndexValues(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.
    `int` | `findLastIndexOf(Closure condition)` Returns the index of the last item that matches the specified condition.
    `int` | `findLastIndexOf(int lowerBound, Closure condition)` Returns the index of the last item that matches the specified condition that is at or beyond the given index.
    `Object` | `findResult()` Iterates through the Array stopping once the first non-null result is found and returning that result.
    `Object` | `findResult(Closure 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.
    `Object` | `findResult(Object defaultResult)` Iterates through the Array stopping once the first non-null result is found and returning that result.
    `Object` | `findResult(Object defaultResult, Closure 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.
    `Collection` | `findResults()` Iterates through the Array collecting any non-null results.
    `Collection` | `findResults(Closure filteringTransform)` Iterates through the Array transforming items using the supplied closure and collecting any non-null results.
    `Object` | `first()` Returns the first item from the array.
    `List` | `flatten()` Flattens an array.
    `Collection` | `flattenMany(Closure transform)` Flatten an array.
    `List` | `getAt(EmptyRange range)` Supports the subscript operator for an object array with an EmptyRange.
    `List` | `getAt(IntRange range)` Supports the subscript operator for an object array with an IntRange giving the desired indices.
    `List` | `getAt(ObjectRange range)` Supports the subscript operator for an object array with an ObjectRange giving the desired indices.
    `List` | `getAt(Range range)` Supports the subscript operator for an object array with a range giving the desired indices.
    `List` | `getAt(Collection indices)` Selects a List of items from an array using a Collection to identify the indices to be selected.
    `IntRange` | `getIndices()` Returns indices of the array.
    `List` | `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.
    `List` | `grep(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.
    `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.
    `int` | `indexOf(Object object)` Returns the index of the first occurrence of the specified element in the array.
    `Object[]` | `init()` Returns the items from the Object array excluding the last item.
    `Object` | `inject(Closure closure)` Iterates through the given array, passing the first two elements to the closure.
    `Object` | `inject(Object initialValue, Closure closure)` Iterates through the given array, passing in the initial value and the first element to the closure.
    `Iterator` | `iterator()` Returns an Iterator which traverses the given array in index order.
    `String` | `join()` Concatenates the string representation of each item in this array.
    `String` | `join(String separator)` Concatenates the string representation of each item in this array, with the given String as a separator between each item.
    `Object` | `last()` Returns the last item from the array.
    `int` | `lastIndexOf(Object object)` Returns the index of the last occurrence of the specified element in 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)` Creates a new array composed of the elements of the first array minus the elements of the given Iterable.
    `Object[]` | `minus(Object removeMe)` Creates a new array composed of the elements of the given array minus every occurrence the given object.
    `Object[]` | `minus(Object[] removeMe)` Creates a new array composed of the elements of the first array minus the elements of the given array.
    `Object[]` | `plus(Iterable right)` Creates an array containing elements from an original array plus those from an Iterable.
    `Object[]` | `plus(Object right)` Creates an array containing elements from an original array plus an additional appended element.
    `Object[]` | `plus(Object[] right)` Creates an array as a union of two arrays.
    `Object[]` | `plus(Collection right)` Creates 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)` Reverses the items in an array.
    `Object[]` | `reverseEach(Closure closure)` Iterates over each element of the array in the reverse order.
    `void` | `shuffle()` Randomly reorders the elements of the specified array.
    `void` | `shuffle(Random rnd)` Randomly reorders the elements of the specified array using the specified random instance as the source of randomness.
    `Object[]` | `shuffled()` Creates a new array containing the elements of the specified array but in a random order.
    `Object[]` | `shuffled(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.
    `int` | `size()` Provides 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.
    `Collection` | `split(Closure closure)` Splits all items into two collections based on the closure condition.
    `Stream` | `stream()` Returns a sequential Stream with the specified array as its source.
    `Object` | `sum()` Sums the items in an array.
    `Object` | `sum(Closure closure)` Sums the result of applying 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[]` | `swap(int i, int j)` Swaps two elements at the specified positions.
    `Object[]` | `tail()` Returns the items from the array excluding the first item.
    `Object[]` | `take(int num)` Returns the first `num` elements from the head of this array.
    `Object[]` | `takeRight(int num)` Returns the last `num` elements from the tail 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.
    `List` | `toList()` Converts this array to a List of the same size, with each element added to the list.
    `Set` | `toSet()` Converts this array to a Set, with each unique element added to the set.
    `Object[]` | `toSorted()` Returns a sorted version of the given array using the supplied comparator.
    `Object[]` | `toSorted(Closure closure)` Sorts the elements from this array into a newly created array using the Closure to determine the correct ordering.
    `Object[]` | `toSorted(Comparator comparator)` Returns a sorted version of the given array using the supplied comparator to determine the resulting order.
    `SpreadMap` | `toSpreadMap()` Creates a spreadable map from this array.
    `String` | `toString()` Returns the string representation of the given array.
    `Object[]` | `toUnique()` 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.
    `Object[]` | `toUnique(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.
    `Object[]` | `toUnique(Comparator 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.
    `Object[]` | `union(Iterable right)` Creates an Object array containing elements from an original array plus those from an Iterable.
    `Object[]` | `union(Object right)` Creates an Object array containing elements from an original array plus an additional appended element.
    `Object[]` | `union(Object[] right)` Creates an Object array as a union of two arrays.
    `Object[]` | `union(Collection right)` Creates an object array containing elements from an original array plus those from a Collection.
    `Map` | `withCollectedKeys(Map collector, Function keyTransform)` A variant of withCollectedKeys for arrays.
    `Map` | `withCollectedKeys(Function keyTransform)` A variant of withCollectedKeys for arrays.
    `Map` | `withCollectedValues(Map collector, Function valueTransform)` A variant of withCollectedValues for arrays.
    `Map` | `withCollectedValues(Function valueTransform)` A variant of withCollectedValues for arrays.

  - #### Methods inherited from class java.lang.Object

    `addShutdownHook`, `any`, `any`, `asBoolean`, `asType`, `collect`, `collect`, `collect`, `dump`, `each`, `eachMatch`, `eachMatch`, `eachWithIndex`, `every`, `every`, `find`, `find`, `findAll`, `findAll`, `findIndexOf`, `findIndexOf`, `findIndexValues`, `findIndexValues`, `findLastIndexOf`, `findLastIndexOf`, `findResult`, `findResult`, `findResult`, `findResult`, `getAt`, `getMetaClass`, `getMetaPropertyValues`, `getProperties`, `grep`, `grep`, `hasProperty`, `identity`, `inject`, `inject`, `inspect`, `invokeMethod`, `is`, `isCase`, `isNotCase`, `iterator`, `metaClass`, `print`, `print`, `printf`, `printf`, `println`, `println`, `println`, `putAt`, `respondsTo`, `respondsTo`, `setMetaClass`, `split`, `sprintf`, `sprintf`, `stream`, `tap`, `toString`, `use`, `use`, `use`, `with`, `with`, `withCloseable`, `withStream`, `withTraits`

- - ### Methods Detail

    - #### public boolean any(Closure predicate)

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

      Parameters:
        `predicate` - the closure predicate used for matching
      Returns:
        true if any iteration for the object matches the closure predicate
      Since:
        2.5.0

    - #### public boolean asBoolean()

      Coerces 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 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:
        `type` - the desired class
      Returns:
        the object resulting from this type conversion
      Since:
        1.5.1

    - #### public Object average()

      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()

      Returns:
        The average of all the items
      Since:
        3.0.0
      See Also:
        Object[]#sum()

    - #### public Object average(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:
        `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

    - #### public List chop(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:
        `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:
        Object[]#collate(int)

    - #### public List collate(int size)

      Collates an array.

      Parameters:
        `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)

    - #### public List collate(int size, boolean keepRemainder)

      Collates this array into sub-lists.

      Parameters:
        `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)

    - #### public List collate(int size, int step)

      Collates an array into sub-lists.

      Parameters:
        `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)

    - #### public List collate(int size, int step, boolean keepRemainder)

      Collates this array into sub-lists.

      Parameters:
        `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

    - #### public List collect(Closure transform)

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

      Parameters:
        `transform` - the closure used to transform each item of the Array
      Returns:
        A list of the transformed values.
      Since:
        2.5.0

    - #### public Object collect(Object collector, Closure 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 answer == [2,4,6]

      Parameters:
        `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

    - #### 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:
        DefaultGroovyMethods#collectEntries(Iterator, 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:
        DefaultGroovyMethods#collect(Map, Collection, Closure)

    - #### public Map collectEntries(Map collector, Function keyTransform, Function 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:
        `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

    - #### public Map collectEntries(Function keyTransform, Function 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:
        `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

    - #### 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

    - #### public Object collectMany(Object collector, 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:
        `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

    - #### 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 predicate)

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

      Parameters:
        `predicate` - 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()

      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()

      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

    - #### 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:
        DefaultGroovyMethods#countBy(Iterator, 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[] dropRight(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:
        `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

    - #### 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 Object[] each(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:
        `closure` - the closure applied on each array entry
      Returns:
        the self array
      Since:
        2.5.0

    - #### public Object[] eachWithIndex(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:
        `closure` - a Closure to operate on each array entry
      Returns:
        the self array
      Since:
        2.5.0

    - #### 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 boolean every(Closure predicate)

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

      Parameters:
        `predicate` - the closure predicate used for matching
      Returns:
        true if the predicate returns true for all elements in the array
      Since:
        2.5.0

    - #### 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 List findAll()

      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]]

      Returns:
        A list of the truthy values.
      Since:
        2.0
      See Also:
        Closure#IDENTITY

    - #### public List 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 the matching values.
      Since:
        2.0

    - #### public int findIndexOf(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:
        `condition` - the matching condition
      Returns:
        The index of the first matched object or -1 if no match was found.
      Since:
        2.5.0

    - #### public int findIndexOf(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.

      Parameters:
        `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

    - #### public List findIndexValues(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:
        `condition` - the matching condition
      Returns:
        a list of numbers corresponding to the index values of all matched objects
      Since:
        2.5.0

    - #### public List findIndexValues(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.

      Parameters:
        `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

    - #### public int findLastIndexOf(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:
        `condition` - the matching condition
      Returns:
        The index of the last matched object or -1 if no match was found.
      Since:
        2.5.0

    - #### public int findLastIndexOf(int lowerBound, 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:
        `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

    - #### public Object findResult()

      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.

      Returns:
        The first non-null result from calling the closure, or null.
      Since:
        4.0.9

    - #### public Object findResult(Closure 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:
        `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

    - #### public Object findResult(Object 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:
        `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

    - #### public Object findResult(Object defaultResult, Closure 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:
        `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

    - #### public Collection findResults()

      Iterates through the Array collecting any non-null results.

      Returns:
        The list of non-null values.
      Since:
        4.0.9

    - #### public Collection findResults(Closure filteringTransform)

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

      Parameters:
        `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

    - #### 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 List flatten()

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

      Returns:
        S flattened Collection
      Since:
        1.6.0

    - #### public Collection flattenMany(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:
        `transform` - a transform applied to any leaf elements
      Returns:
        a flattened Collection
      Since:
        5.0.0

    - #### public List getAt(EmptyRange range)

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

      Parameters:
        `range` - an EmptyRange
      Returns:
        an empty Range
      Since:
        1.5.0

    - #### public List getAt(IntRange range)

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

      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)

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

      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)

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

      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)

      Selects a List of items from an 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 IntRange getIndices()

      Returns indices of the array.

      Example:

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

      Returns:
        an index range
      Since:
        2.4.0

    - #### public List 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 list of elements which satisfy Groovy truth
      Since:
        2.0
      See Also:
        Closure#IDENTITY

    - #### public List grep(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:
        `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

    - #### 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 map grouped by keys.
      Since:
        2.2.0

    - #### 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 map grouped by keys on each criterion.
      Since:
        2.2.0

    - #### 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 map grouped by keys on each criterion.
      Since:
        2.2.0

    - #### 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 int indexOf(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

      Parameters:
      Since:
        5.0.0

    - #### public Object[] init()

      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

      Returns:
        an array without its last element
      Since:
        2.4.0

    - #### public Object inject(Closure 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:
        `closure` - a closure
      Returns:
        first value for single-element array or 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 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:
        `initialValue` - base value
        `closure` - a closure
      Returns:
        base value for empty array or the result of the last closure call
      Since:
        1.5.0

    - #### public Iterator iterator()

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

      Returns:
        an Iterator backed by the given Array.
      Since:
        1.6.4
      See Also:
        ArrayIterator

    - #### public String join()

      Concatenates the string representation of each item in this array.

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

      Returns:
        the joined String
      Since:
        5.0.0

    - #### public String join(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:
        `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 int lastIndexOf(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

      Parameters:
      Since:
        5.0.0

    - #### public Object max()

      Adds max() method to Object arrays.

      Returns:
        the maximum value
      Since:
        1.5.5
      See Also:
        DefaultGroovyMethods#max(Iterator)

    - #### 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

    - #### 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
      See Also:
        DefaultGroovyMethods#max(Iterator, Comparator)

    - #### public Object min()

      Adds min() method to Object arrays.

      Returns:
        the minimum value
      Since:
        1.5.5
      See Also:
        DefaultGroovyMethods#min(Iterator)

    - #### 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:
        DefaultGroovyMethods#min(Iterator, 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:
        DefaultGroovyMethods#min(Iterator, java.util.Comparator)

    - #### public Object[] minus(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:
        `removeMe` - an Iterable of elements to remove
      Returns:
        An array with the supplied elements removed.
      Since:
        1.5.5

    - #### public Object[] minus(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:
        `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)

      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:
        `removeMe` - an array of elements to remove
      Returns:
        An array with the supplied elements removed.
      Since:
        1.5.5

    - #### public Object[] plus(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:
        `right` - an Iterable to be appended
      Returns:
        A new array containing elements from left with those from right appended.
      Since:
        1.8.7
      See Also:
        Object[]#union(Iterable)

    - #### public Object[] plus(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:
        `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)

      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:
        `right` - the right Array
      Returns:
        A new array containing right appended to left.
      Since:
        1.8.7

    - #### public Object[] plus(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:
        `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)

      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:
        `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

    - #### public Object[] reverseEach(Closure closure)

      Iterates 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 void shuffle()

      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) }

      Since:
        3.0.0

    - #### public void shuffle(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:
      Since:
        3.0.0

    - #### public Object[] shuffled()

      Creates a new array containing the elements of the specified array but in a random order.

          Integer[] array = [10, 5, 20]
          def result = array.shuffled()
          assert array !== result
          assert array.length == result.length
          assert array.every{ result.contains(it) }
          assert array == new Integer[] {10, 5, 20}

      Returns:
        the shuffled array
      Since:
        3.0.0

    - #### public Object[] shuffled(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[] array = [10, 5, 20]
          def result = array.shuffled(r)
          assert array !== result
          assert array.length == result.length
          assert array.every{ result.contains(it) }
          assert array == new Integer[] {10, 5, 20}

      Parameters:
      Returns:
        the shuffled array
      Since:
        3.0.0

    - #### public int size()

      Provides the standard Groovy `size()` method for an array.

      Returns:
        the 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 Collection split(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:
        `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

    - #### public Stream stream()

      Returns a sequential Stream with the specified array as its source.

      Returns:
        a `Stream` for the array
      Since:
        2.5.0

    - #### 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 the items
      Since:
        1.7.1
      See Also:
        DefaultGroovyMethods#sum(java.util.Iterator)

    - #### public Object sum(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:
        `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

    - #### 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 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 (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

    - #### public Object[] swap(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:
        `i` - a position
        `j` - a position
      Returns:
        self
      Since:
        2.4.0

    - #### public Object[] tail()

      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

      Returns:
        an 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 than `num` elements.
      Since:
        1.8.1

    - #### public Object[] takeRight(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:
        `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

    - #### 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 List toList()

      Converts this array to a List of the same size, with each element added to the list.

      Returns:
        A mutable list containing the contents of this array.
      Since:
        1.0

    - #### public Set toSet()

      Converts this array to a Set, with each unique element added to the set.

      Returns:
        A set containing the unique contents of this array.
      Since:
        5.0.0

    - #### public Object[] toSorted()

      Returns a sorted version of the given array using the supplied comparator.

      Returns:
        the sorted array
      Since:
        2.4.0
      See Also:
        Object[]#toSorted(Comparator)

    - #### public Object[] toSorted(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:
        a sorted array
      Since:
        2.4.0
      See Also:
        Object[]#toSorted(Comparator)

    - #### public Object[] toSorted(Comparator 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:
        `comparator` - a Comparator used for the comparison
      Returns:
        the sorted array
      Since:
        2.4.0

    - #### 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[])

    - #### public String toString()

      Returns the string representation of the given array.

      Returns:
        the string representation
      Since:
        1.0

    - #### public Object[] toUnique()

      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

      Returns:
        the unique items from the array

    - #### public Object[] toUnique(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:
        `closure` - a Closure used to determine unique items
      Returns:
        the unique items from the array

    - #### public Object[] toUnique(Comparator 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:
        `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

    - #### public Object[] union(Iterable right)

      Creates an Object array containing elements from an original array plus those from an Iterable. This is similar to Object[]#plus(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:
        `right` - an Iterable to be appended
      Returns:
        A new Object array containing elements from left with those from right appended.
      Since:
        4.0.0

    - #### public Object[] union(Object right)

      Creates an Object array containing elements from an original array plus an additional appended element. This is similar to Object[]#plus(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:
        `right` - the value to append
      Returns:
        A new Object array containing left with right appended to it.
      Since:
        4.0.0

    - #### public Object[] union(Object[] right)

      Creates an Object array as a union of two arrays. This is similar to Object[]#plus(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:
        `right` - the right Array
      Returns:
        A new Object array containing right appended to left.
      Since:
        4.0.0

    - #### public Object[] union(Collection right)

      Creates an object array containing elements from an original array plus those from a Collection. This is similar to Object[]#plus(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:
        `right` - a Collection to be appended
      Returns:
        A new Object array containing left with right appended to it.
      Since:
        4.0.0

    - #### public Map withCollectedKeys(Map collector, Function keyTransform)

      A variant of withCollectedKeys for arrays.

      Parameters:
        `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)

    - #### public Map withCollectedKeys(Function keyTransform)

      A variant of withCollectedKeys for arrays.

      Parameters:
        `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)

    - #### public Map withCollectedValues(Map collector, Function valueTransform)

      A variant of withCollectedValues for arrays.

      Parameters:
        `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

    - #### public Map withCollectedValues(Function valueTransform)

      A variant of withCollectedValues for arrays.

      Parameters:
        `valueTransform` - a function for transforming array elements into values
      Returns:
        A map of the transformed entries.
      Since:
        5.0.0