Go - PP() - pretty printer for variables

pp.go

package pp

import (
  "fmt"
  "encoding/json"
)

// Pretty print structures. Uses "encoding/json" to
// convert nested structure to indented string.
func PP(v interface{}) {
	b, err := json.MarshalIndent(v, "", "  ")
	if err != nil {
		fmt.Printf("error: %s", err)
	}
	fmt.Printf("%T %v\n", v, string(b))
}