package util

import "math/rand"

const (
	alphabet     = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
	number       = "0123456789"
	alphanumeric = alphabet + number
)

func RandStringAlphaNumeric(length int) (str string) {
	for i := 0; i < length; i++ {
		str += string(alphanumeric[rand.Intn(len(alphanumeric))])
	}
	return
}

func RandStringAlphabet(length int) (str string) {
	for i := 0; i < length; i++ {
		str += string(alphabet[rand.Intn(len(alphabet))])
	}
	return
}

func RandStringNumber(length int) (str string) {
	for i := 0; i < length; i++ {
		str += string(number[rand.Intn(len(number))])
	}
	return
}