Using reflection to detect if type is slice and set property

detectTypeSetInt.go

package main

import(
	"fmt"
	"reflect"
)

type X struct {
	Prop int
}

func (x *X) method(){}

func main(){
	val1 := &X{}
	doSomething(val1)
	fmt.Println(val1)
	
	fmt.Println("\n==========\n")
	
	val2 := &[]X{X{},X{}}
	doSomething(val2)
	fmt.Println(val2)
}

func doSomething(v interface{}) {
	//valType := reflect.TypeOf(v)
	val := reflect.ValueOf(v)
	fmt.Printf("%T\n",val)
	fmt.Printf("%v\n",val)
	if val.Kind() == reflect.Ptr {
		elm := val.Elem()
		fmt.Printf("%T\n",elm)
		fmt.Printf("%v\n",elm)
		if elm.Kind() == reflect.Slice {
			for i:=0 ; i<elm.Len();i++ {
			//for _, v := range elm.Pointer() {
			//for _, v := range val {
			//for _, v := range elm {
				elm.Index(i).FieldByName("Prop").SetInt(2)
				//val.Index(i).FieldByName("Prop").SetInt(2)
				//v.FieldByName("Prop").SetInt(2)
				//v.Prop = 2
			}
		} else {
			elm.FieldByName("Prop").SetInt(4)
			//val.FieldByName("Prop").SetInt(4)
			//elm.prop = 4
			//val.prop = 4
		}
	}
}