package helper

import (
	"crypto/rand"
	"math/big"
)

func Ender() string {
	return string(rune(0))
}

func StringToByteWithEnd(str string) []byte {
	return append([]byte(str), byte(0))
}

func GetRandString(length int) string {
	const charset = "qwertyuiopasdfghjklzxcvbnm"
	result := make([]byte, length)
	for i := range result {
		num, err := rand.Int(rand.Reader, big.NewInt(int64(len(charset))))
		if err != nil {
			panic(err)
		}
		result[i] = charset[num.Int64()]
	}
	return string(result)
}