[GROOVY-5414] Groovy could benefit from DGM takeWhile and dropWhile methods

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.8.6
• Fix Version/s: 2.0-beta-3, 1.8.7
• Component/s: groovy-jdk
• Assignee: Paul King
• Reporter: Andrew Taylor
• Created: 21/Apr/12 12:19
• Updated: 16/Aug/19 23:15
• Resolved: 24/Apr/12 00:06

Description

Currently, there is a take method on collections that returns the first N items in a collection. Other languages such as scala and haskell also provide a takeWhile method, that is similar. Instead of taking a fixed number of items, it takes items until a condition, in the form of a closure, is met.

For example:

def items = [1,2,3,4,5,4,3,2,1]
def sublist = items.takeWhile { it < 5 }
assert sublist == [1,2,3,4]

Issue Links

• is related to: GROOVY-4865 Add a take method to Collections, Iterators, Arrays