[GROOVY-10879] Potential additional DGM collectEntries variants

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0.0-alpha-1
• Assignee: Paul King
• Reporter: Paul King
• Created: 20/Dec/22 02:40
• Updated: 23/Aug/23 09:11
• Resolved: 22/Dec/22 01:33

Description

As discussed in the mailing list:
https://lists.apache.org/thread/7rd6wdblnh7bmdf6socjnbf21crg37g0

Existing variants:

var languages = ['Kotlin', 'Groovy', 'Java', 'Clojure']
assert languages.collectEntries{ [it.toLowerCase(), it.size()] } ==
    [kotlin:6, groovy:6, java:4, clojure:7]
assert languages.collectEntries{ [it.toLowerCase(), it] } ==
    [kotlin:'Kotlin', groovy:'Groovy', java:'Java', clojure:'Clojure']
assert languages.collectEntries(Scala:5){ [it, it.size()] } ==
    [Scala:5, Kotlin:6, Groovy:6, Java:4, Clojure:7]

Proposed new variants:

assert languages.collectEntries(String::toLowerCase, String::size) == [kotlin:6, groovy:6, java:4, clojure:7]
assert languages.withCollectedKeys(String::toLowerCase) == [kotlin:'Kotlin', groovy:'Groovy', java:'Java', clojure:'Clojure']
assert languages.withCollectedValues([Scala:5], String::size) == [Scala:5, Kotlin:6, Groovy:6, Java:4, Clojure:7]
def squared = e -> e ** 2
assert [Scala:5, Kotlin:6, Groovy:6, Java:4, Clojure:7].collectEntries(String::toLowerCase, squared) ==
    [scala:25, kotlin:36, groovy:36, java:16, clojure:49]

Issue Links

• links to: GitHub Pull Request #1834