package main

import (
	"os"
	"fmt"
	"strings"
	"reflect"
	"flag"
	"github.com/tidwall/gjson"
)


func main(){
	
	var expr 	string 
	var json	string
	
	flag.StringVar(&expr, "expr", "", "json extract expr")
	flag.Parse()
	
	if flag.NArg() == 0 {
		fmt.Print("need json content")
		os.Exit(2)
	}else{
		json = strings.Join(flag.Args(), " ")
	}
	
	var value interface{}
	
	if expr != "" {
		value = gjson.Get(json, expr)
	}
	
	switch v := value.(type) {
		case []string 	:	
							for _, object := range v {
								fmt.Println( object )
							}
							
		case gjson.Result	:	
								for _, object := range v.Array() {
									fmt.Println( object.Raw )
								}
							
		default			:
							fmt.Println( reflect.TypeOf(value) )
							
	}
}