如何动态清除golang中类型结构实例的值？

Question

Is it possible with golang to make a method that dynamically clears the values of a instance of a struct? btw Im new to golang.

type A struct {
    Name string
    Level int
}

type B struct {
    Skill string
}

func main() {
    a := A{"Momo", 1}
    b := B{"Starfall"}

    // outputs
    // {"Momo", 1}
    // {"Starfall"}

    clear(a)
    clear(b)

    // outputs
    // { , 0}
    // { }
}

func clear(v interface{}) {
    // some code
}

Answer 1

You can't modify the original values without passing a pointer to them.

It's much easier and more clear to simply assign a new zero value in your code. If your types are more complex, you can replace the values with a constructor, or provide Reset() methods for your types with a pointer receiver.

If you really want to see how to do it via reflection your clear function could look like: http://play.golang.org/p/g0zIzQA06b

func clear(v interface{}) {
    p := reflect.ValueOf(v).Elem()
    p.Set(reflect.Zero(p.Type()))
}

(This will panic if you pass in a non-pointer value)