An example of a subtle bug you can run into when using the JSON decoder. Try it both ways. You'll see what's what.

scope_example.go

package main

import (
  "encoding/json"
	"fmt"
)

var A = []byte(`{"foo": "bar"}`)
var B = []byte(`{"bar": "baz"}`)

func main() {
	// var dat map[string]interface{}  // This is bad
	var things = [][]byte{A,B}
	for _, thing := range things {
		var dat map[string]interface{} // This is good
		json.Unmarshal(thing, &dat)
		fmt.Println(dat)
	}
}