pyraconv is Go type conversion library

    go get github.com/CossackPyra/pyraconv

It is used convert interface{} after unmarshaling JSON

Example

package main

import (
	"encoding/json"
	"fmt"

	"github.com/CossackPyra/pyraconv"
)

func main() {

	arrjson := []string{`{}`,
		`{"x":"1234557", "u":"http://golang.org/"}`,
		`{"x":325436, "u":["http://golang.org/", "http://www.golang.org/"]}`}

	for _, json1 := range arrjson {
		var m1 map[string]interface{}
		e := json.Unmarshal([]byte(json1), &m1)
		if e != nil {
			continue
		}
		x := pyraconv.ToInt64(m1["x"])
		fmt.Println("X:", x)
		u := pyraconv.ToStringArray(m1["u"])
		for i1, url := range u {
			fmt.Println("URL:", i1, url)
		}
	}

}

Result

X: 0
X: 1234557
URL: 0 http://golang.org/
X: 325436
URL: 0 http://golang.org/
URL: 1 http://www.golang.org/

Doc: https://godoc.org/github.com/CossackPyra/pyraconv