+1 Cheers, Daniel Sun
On 2022/12/19 11:23:19 Paul King wrote: > Hi folks, > > @mrhaki who many of you may know as the author of "Groovy Goodness" also > covers other topics and recently covered Kotlin's associate method: > > https://blog.jdriven.com/2022/12/kotlin-kandy-transform-items-in-a-collection-to-a-map-with-associate/ > > Groovy addresses this use case fairly well using collectEntries, e.g.: > > 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] > > But we don't have exact equivalents to associateWith and associateBy. The > collectEntries variants handle all the cases but there is some simplicity > that would come with additional equivalent variants, e.g.: > > // "collectEntriesWith" could be just "collectEntries" if we want > assert languages.collectEntriesWith(String::toLowerCase, String::size) == > [kotlin:6, groovy:6, java:4, clojure:7] > // equivalent of associateBy > assert languages.collectEntriesWithKey(String::toLowerCase) == > [kotlin:'Kotlin', groovy:'Groovy', java:'Java', clojure:'Clojure'] > // equivalent of associateWith > assert languages.collectEntriesWithValue(String::size) == > [Kotlin:6, Groovy:6, Java:4, Clojure:7] > > The method names are just suggestions at this point. > > Thoughts? > > Cheers, Paul. >
