handling_nulls_using_pointers.go

package main

import (
	"encoding/json"
	"fmt"
)

type User struct {
	Fname string
	Mname *string
	Lname string
}

func main() {
	jstr := `{"fname":"john","mname":null,"lname":"doe"}`
	b := []byte(jstr)

	var u User
	if err := json.Unmarshal(b, &u); err != nil {
		fmt.Println(err.Error())
	}

	fmt.Println(u)
	
	res, err := json.Marshal(u)
	if err != nil {
		fmt.Println(err.Error())
	}
	
	fmt.Println(string(res))
}