groovy.util

Class GroovyCollections

java.lang.Object

groovy.util.GroovyCollections

public class GroovyCollections
extends java.lang.Object

A Collections utility class

Author:

Paul King

Constructor Summary

Constructors

Constructor and Description
GroovyCollections()

Method Summary

Methods

Modifier and Type	Method and Description
static java.util.List	combinations(java.util.Collection lists) Finds all combinations of items from a collection of lists.
static java.util.List	combinations(java.lang.Object[] lists) Finds all combinations of items from an array of lists.
static java.lang.Object	max(java.util.Collection items) Selects the maximum value found in a collection
static java.lang.Object	max(java.lang.Object[] items) Selects the maximum value found in an array of items, so min([2, 4, 6] as Object[]) == 6.
static java.lang.Object	min(java.util.Collection items) Selects the minimum value found in a collection of items.
static java.lang.Object	min(java.lang.Object[] items) Selects the minimum value found in an array of items, so min([2, 4, 6] as Object[]) == 2.
static java.lang.Object	sum(java.util.Collection items) Sums all the items from a collection of items.
static java.lang.Object	sum(java.lang.Object[] items) Sums all the items from an array of items.
static java.util.List	transpose(java.util.Collection lists) Transposes a collection of lists.
static java.util.List	transpose(java.lang.Object[] lists) Transposes an array of lists.

Methods inherited from class java.lang.Object

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

Constructor Detail

GroovyCollections

public GroovyCollections()

Method Detail

combinations

public static java.util.List combinations(java.lang.Object[] lists)

Finds all combinations of items from an array of lists.

Parameters:

lists - an array of lists

Returns:

a List of the combinations found

combinations

public static java.util.List combinations(java.util.Collection lists)

Finds all combinations of items from a collection of lists.

Parameters:

lists - a Collection of lists

Returns:

a List of the combinations found

transpose

public static java.util.List transpose(java.lang.Object[] lists)

Transposes an array of lists. So, transpose([['a', 'b'], [1, 2]] as Object[]) == [['a', 1], ['b', 2]].

Parameters:

lists - an array of lists

Returns:

a List of the transposed lists

transpose

public static java.util.List transpose(java.util.Collection lists)

Transposes a collection of lists. So, transpose([['a', 'b'], [1, 2]]) == [['a', 1], ['b', 2]].

Parameters:

lists - a Collection of lists

Returns:

a List of the transposed lists

min

public static java.lang.Object min(java.lang.Object[] items)

Selects the minimum value found in an array of items, so min([2, 4, 6] as Object[]) == 2.

Parameters:

items - an array of items

Returns:

the minimum value

min

public static java.lang.Object min(java.util.Collection items)

Selects the minimum value found in a collection of items.

Parameters:

items - a Collection

Returns:

the minimum value

max

public static java.lang.Object max(java.lang.Object[] items)

Selects the maximum value found in an array of items, so min([2, 4, 6] as Object[]) == 6.

Parameters:

items - an array of items

Returns:

the maximum value

max

public static java.lang.Object max(java.util.Collection items)

Selects the maximum value found in a collection

Parameters:

items - a Collection

Returns:

the maximum value

sum

public static java.lang.Object sum(java.lang.Object[] items)

Sums all the items from an array of items.

Parameters:

items - an array of items

Returns:

the sum of the items

sum

public static java.lang.Object sum(java.util.Collection items)

Sums all the items from a collection of items.

Parameters:

items - a collection of items

Returns:

the sum of the items