Groovy为我的班级设置.each行为

Question

I have a class in my project with a List defined in it. Would it be possible to point each (and all subsequent related methods such as eachWithIndex ) to use that List.

The only possible solution I can see would be to make my class extend List , which I would rather not do.

Answer 1

You can use @Delegate transformation as below which delegates those method calls to List :

class Test {
    @Delegate List myList
}

new Test(myList: [1, 2, 3]).each { println it }

new Test(myList: ['a', 'b', 'c']).eachWithIndex { val, index -> 
    println "$val at $index" 
}