[Go] go语言中使用方法声明给类定义方法

type Ages []int

func (a *Ages) AgeAdd(num int) {
    ages := append([]int(*a), num)
    *a = ages
}

func TestMyage(t *testing.T) {
    var ages Ages
    ages.AgeAdd(10)
    ages.AgeAdd(20)
    t.Logf("%+v", ages)
}