Generate Slice using reflection

genslice.go

package main

import (
	"fmt"
	"reflect"
)

type Model interface {
	GetHello()
}

type Orders struct {
	Id int64
}

func (o Orders) GetHello() {
	fmt.Println("Hello")
}

func resSliceOrders(inf interface{}) string {
	switch t := inf.(type) {
	case []Orders:
		return "[]Orders"
	case *[]Orders:
		*t = append(*t, Orders{Id: 77})
		*t = append(*t, Orders{Id: 88})

		return "this is it *[]Orders"
	default:
		return fmt.Sprintf("%+v\n", t)
	}

	return ""
}

func populate(m ...Model) error {
	var err error
	for _, x := range m {
		// Create a slice to begin with
		myType := reflect.TypeOf(x)
		slice := reflect.MakeSlice(reflect.SliceOf(myType), 0, 0)

		// Create a pointer to a slice value and set it to the slice
		x := reflect.New(slice.Type())
		x.Elem().Set(slice)

		objSlice := x.Interface()
		fmt.Println(resSliceOrders(objSlice))
		fmt.Printf("%+v\n", objSlice)
		sl:=reflect.Indirect(reflect.ValueOf(objSlice))
		for i:=0; i < sl.Len(); i++ {
			
			fmt.Printf("%+v\n",sl.Index(i).Interface())
		}
	}
	return err
}
func main() {

	populate(Orders{})
}