[GROOVY-2419] Provide a collectAll() method for lists (WAS: Provide a 'SpreadAllDot' operator)

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.5, 1.5.1
• Fix Version/s: 1.5.2
• Assignee: Paul King
• Reporter: Paul King
• Created: 19/Dec/07 03:48
• Updated: 07/Apr/15 19:06
• Resolved: 03/Jan/08 05:46

Description

Currently we have list*.method() that invokes the method on all items in the list.
It would be useful to also support list**.method() that invokes the method on all items in the list and recursively for any lists within the list.

def animalLists= [["ant", "mouse", "elephant"], ["deer", "monkey"]]
assert animalLists.size() == 2
assert animalLists*.size() == [3, 2]
assert animalLists**.size() == [[3, 5, 8], [4, 6]]