package main

import (
	"encoding/json"
	"fmt"
)

type object struct {
	Value string `json:"value"`
}

func main() {	
	arr := make([]string, 0)
	mp := make(map[string]string, 0)

	var obj *object = nil
		
        output := struct {
		Array  []string           `json:"array"`
		Map    map[string]string  `json:"map"`
		Object *object            `json:"object"`
		
        }{
		arr,
		mp,
		obj,
        }

	out, _ := json.Marshal(output)
	fmt.Printf("%s", out)	
}