In Groovy we can use the head and tail methods for a long time on Collection objects. With head we get the first element and with tail the remaining elements of a collection. Since Groovy 2.4 we have a new method init which returns all elements but the last in a collection.
In the following example we have a simple list and apply the different methods:
1 2 3 4 5 6 7 8 | def gr8Tech = ['Groovy', 'Grails', 'Spock', 'Gradle', 'Griffon']// Since Groovy 2.4 we can use the init method.assert gr8Tech.init() == ['Groovy', 'Grails', 'Spock', 'Gradle']assert gr8Tech.last() == 'Griffon'assert gr8Tech.head() == 'Groovy'assert gr8Tech.tail() == ['Grails', 'Spock', 'Gradle', 'Griffon'] |
Code written with Groovy 2.4.
