creating json from map[string]interface

marshal.go

package main

import (
	"encoding/json"
	"fmt"
)

func main() {
	fmt.Println("Hello, playground")

	sm := make(map[string]interface{})

	sm["numero"] = 2
	sm["stringa"] = "ciao"
	sm["array_of_int"] = []int{1, 2, 3}
	sm["array_of_string"] = []string{"io", "tu", "enoi"}
	sm["wan"] = map[string]string{"chiave1": "valore1", "chiave2": "valore"}

	js, _ := json.Marshal(sm)

	fmt.Println(string(js))

}