[GROOVY-2120] Groovy should have a transpose() method

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.1-beta-2
• Fix Version/s: 1.1-beta-3
• Assignee: Paul King
• Reporter: Paul King
• Created: 13/Sep/07 05:57
• Updated: 07/Apr/15 19:06
• Resolved: 13/Sep/07 06:28

Description

Groovy should have a transpose method like:

Ruby's transpose() method on arrays
Python's zip() method

expected behaviour:

assert [['a', 'b'], [1, 2, 3]].transpose() == [['a', 1], ['b', 2]]
assert transpose(['a', 'b'], [1, 2, 3]) == [['a', 1], ['b', 2]]
assert transpose([1, 2, 3], [4, 5, 6]) == [[1, 4], [2, 5], [3, 6]]
assert transpose([1, 2, 3], [4, 5], [9], [6, 7, 8]) == [[1, 4, 9, 6]]
assert transpose([1, 2, 3]) == [[1], [2], [3]]
assert transpose([]) == []