15、集合 multiply

class GroovyTest {

    static void main(args) {

        def list = [1,2,3]
        def newList = list.multiply(2)
        println(newList)


        def list1 = [1,2,3]
        def newList1 = list*3
        println(newList1)

    }
}

输出：

[1, 2, 3, 1, 2, 3]
[1, 2, 3, 1, 2, 3, 1, 2, 3]

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