1 // Copyright 2012 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package main 6 7 import ( 8 "encoding/json" 9 "fmt" 10 "log" 11 "reflect" 12 ) 13 14 func Decode() { 15 b := []byte(`{"Name":"Wednesday","Age":6,"Parents":["Gomez","Morticia"]}`) 16 17 var f interface{} 18 err := json.Unmarshal(b, &f) 19 20 // STOP OMIT 21 22 if err != nil { 23 panic(err) 24 } 25 26 expected := map[string]interface{}{ 27 "Name": "Wednesday", 28 "Age": float64(6), 29 "Parents": []interface{}{ 30 "Gomez", 31 "Morticia", 32 }, 33 } 34 35 if !reflect.DeepEqual(f, expected) { 36 log.Panicf("Error unmarshaling %q, expected %q, got %q", b, expected, f) 37 } 38 39 f = map[string]interface{}{ 40 "Name": "Wednesday", 41 "Age": 6, 42 "Parents": []interface{}{ 43 "Gomez", 44 "Morticia", 45 }, 46 } 47 48 // STOP OMIT 49 50 m := f.(map[string]interface{}) 51 52 for k, v := range m { 53 switch vv := v.(type) { 54 case string: 55 fmt.Println(k, "is string", vv) 56 case int: 57 fmt.Println(k, "is int", vv) 58 case []interface{}: 59 fmt.Println(k, "is an array:") 60 for i, u := range vv { 61 fmt.Println(i, u) 62 } 63 default: 64 fmt.Println(k, "is of a type I don't know how to handle") 65 } 66 } 67 68 // STOP OMIT 69 } 70 71 func main() { 72 Decode() 73 } 74
