Examples of reflection with slices

reflectSlice.go

func copySlice(dst interface{}, src interface{}) error {
	d := reflect.ValueOf(dst)
	if !d.CanAddr() {
		d = d.Elem()
	} else {
		return errors.New("dst must be pointer")
	}
	s := reflect.ValueOf(src)
	c := reflect.MakeSlice(d.Type(), s.Len(), s.Len())
	reflect.Copy(c, s)
	d.Set(c)
	return nil
}

func copyBytes(dst *[]byte, src []byte) error {
	r := reflect.ValueOf(dst).Elem()

	if !r.CanSet() {
		return errors.New("Value unsettable")
	}
	r.SetBytes(src)
	return nil
}