map to struct

maptostruct.go

package main

import (
        "fmt"
        "github.com/mitchellh/mapstructure"
        r "reflect"
)

type S struct {
        Name   string
        Age    int
        Embed   C
}

type C struct {
        ID uint
}

func main() {

        s := S{Age: 8}
        input := map[string]interface{}{
                "Name": "nameeee",
                "Age": 10,
                "Embed": C{ID: 16},
        }
        err := mapstructure.Decode(input, &s)
        if err != nil {
                fmt.Printf("%#v\n", err)
        }
        fmt.Printf("%#v\n", s)


        s2 := S{Age: 9}
        input2 := map[string]interface{}{
                "Name": "nameeee",
                "Age": 10,
                "Embed": C{ID: 16},
        }
        MapToStruct(input2, &s2)
        fmt.Printf("%#v\n", s2)


}

func MapToStruct(mapVal map[string]interface{}, val interface{}) (ok bool) {
        structVal:= r.Indirect(r.ValueOf(val))
        for name, elem := range mapVal {
                structVal.FieldByName(name).Set(r.ValueOf(elem))
        }

	return
}