Added json.NewDecoder example (#566)

* Update json.go

adding example for json.NewDecoder

* updated as per Contributings.md instructions

Author: bhaskar253

examples/json/json.go

@@ -8,6 +8,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"os"
+	"strings"
 )
 
 // We'll use these two structs to demonstrate encoding and
@@ -121,4 +122,11 @@ func main() {
 	enc := json.NewEncoder(os.Stdout)
 	d := map[string]int{"apple": 5, "lettuce": 7}
 	enc.Encode(d)
+
+	// We can also decode JSON directly from `os.Reader`
+	dec := json.NewDecoder(strings.NewReader(str))
+	res1 := response2{}
+	dec.Decode(&res1)
+	fmt.Println(res1)
+	fmt.Println(res1.Fruits[1])
 }

examples/json/json.hash

@@ -1,2 +1,2 @@
-35295476f817fe575619b6168273a29eddd7f545
-JOQpRGJWAxR
+75a5664321dafe10fa623c187b90f079c5319a3c
+jR7IEUPQF8T