Golang substring for multi byte characters

gosubstring

//simple substring algorithm for multi byte characters written in golang
//try it http://play.golang.org/p/whbzj3VgSG
package main

import (
	"fmt"
	"strings"
)

func main() {
	fmt.Println(substr("хлеб", 2, 2))
	fmt.Println(substr("僤凘墈 葎萻萶 銈 磑禠", 2, 6))
}

func substr(s string, from, length int) string {
	//create array like string view
	wb := []string{}
	wb = strings.Split(s, "")

	//miss nil pointer error
	to := from + length

	if to > len(wb) {
		to = len(wb)
	}

	if from > len(wb) {
		from = len(wb)
	}

	return strings.Join(wb[from:to], "")
}

Play it play.golang.com

Thanks

Why not use foo := []rune(stringhere) instead?

For recent Go:

string([]rune(origin)[start:end])