Grails on Groovy > Transform Collection / List to a Map with collectEntries > Get Map From Array List > Convert List To Corresponding Map Entity

Since Groovy 1.7.9 we can use the collectEntries method for a Collection to get a Map. We use a closure to transform the elements in the collection to a map entry. And the end result is a Map with all the map entries.

List<String> words = ["Grails", "On", "Groovy"] Map map = words.collectEntries { [ (it): it.contains("G") ] } println(map)

Which will output as below:

[Grails:true, On:false, Groovy:true]