package util

import (
	"fmt"
	"math/rand"
	"time"
)

func RandNumString(size int) string {
	rand.Seed(time.Now().Unix())
	var str = ""
	for i := 0; i < size; i++ {
		str += fmt.Sprintf("%d", rand.Intn(10))
	}
	return str
}

func GenerateCodeStr(size uint) string {
	var chars = "abcdefghijklmnopqrstuvwxyz0123456789"
	var ridx int
	var strCode string
	for i := uint(0); i < size; i++ {
		rand.Seed(time.Now().UnixNano())
		ridx = rand.Intn(36)
		strCode += chars[ridx : ridx+1]
	}
	return strCode
}