[GROOVY-4294] Collection and Map functions

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 1.7.3
• Fix Version/s: 1.8-beta-1
• Component/s: groovy-jdk
• Flags: Patch
• Assignee: Paul King
• Reporter: Brad Long
• Created: 07/Jul/10 05:51
• Updated: 05/Apr/15 14:44
• Resolved: 09/Jul/10 19:25

Description

This improvement adds the following methods to Set:

union - for completeness, a synonym for plus (to match intersect)

This improvement adds the following methods to Map:

Set domain() - a synonym for keySet
Set codomain() - returns a set of unique values
Set range() - a synonym for codomain
Map domainRestrict(Set s) - returns a map of those entries whose keys appear in set s
Map rangeRestrict(Set s) - returns a map of those entries whose values appear in set s
Set image(Set s) - returns a set of unique values of a map whose domain appears in set s. Note image is equivalent to map.domainRestrict(s).range()
Map invert(Map m) - returns a map with the key value relationship inverted.