package utils

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

func RandString(len int) string {
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	bytes := make([]byte, len)
	for i := 0; i < len; i++ {
		b := r.Intn(26) + 65
		bytes[i] = byte(b)
	}
	return string(bytes)
}

func ArrayToString(array []int) string {
	var str string
	for k, v := range array {
		if k == 0 {
			str = strconv.Itoa(v)
		} else {
			str = str + "," + strconv.Itoa(v)
		}
	}

	return str
}

func RandomStringFast(length int) string {
	const letters = "abcdefghijklmnopqrstuvwxyz0123456789"
	bytes := make([]byte, length)
	for i := range bytes {
		// 生成随机字节（0-255）
		bytes[i] = letters[rand.Int63()%int64(len(letters))]
	}
	return string(bytes)
}