// This example uses RawMessage to delay parsing part of a JSON message. func ExampleRawMessage() { type Color struct { Space string Point json.RawMessage // delay parsing until we know the color space } type RGB struct { R uint8 G uint8 B uint8 } type YCbCr struct { Y uint8 Cb int8 Cr int8 } var j = []byte(`[ {"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10}}, {"Space": "RGB", "Point": {"R": 98, "G": 218, "B": 255}} ]`) var colors []Color err := json.Unmarshal(j, &colors) if err != nil { log.Fatalln("error:", err) } for _, c := range colors { var dst interface{} switch c.Space { case "RGB": dst = new(RGB) case "YCbCr": dst = new(YCbCr) } err := json.Unmarshal(c.Point, dst) if err != nil { log.Fatalln("error:", err) } fmt.Println(c.Space, dst) } // Output: // YCbCr &{255 0 -10} // RGB &{98 218 255} }
func ExampleUnmarshal() { var jsonBlob = []byte(`[ {"Name": "Platypus", "Order": "Monotremata"}, {"Name": "Quoll", "Order": "Dasyuromorphia"} ]`) type Animal struct { Name string Order string } var animals []Animal err := json.Unmarshal(jsonBlob, &animals) if err != nil { fmt.Println("error:", err) } fmt.Printf("%+v", animals) // Output: // [{Name:Platypus Order:Monotremata} {Name:Quoll Order:Dasyuromorphia}] }