Question

How to generate random string without repetition in Go

Answer 1

package main

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

func generateUniqueRandomString(total int) string {
	chars := "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
	charsLength := len(chars)
	result := ""
	usedChars := make(map[rune]bool)

	rand.Seed(time.Now().UnixNano())

	for len(result) < total {
		randomIndex := rand.Intn(charsLength)
		randomChar := rune(chars[randomIndex])

		if !usedChars[randomChar] {
			result += string(randomChar)
			usedChars[randomChar] = true
		}
	}

	return result
}

func main() {
	fmt.Println(generateUniqueRandomString(15))
}



/*
run:

K9L6WdhtmnSB2sk

*/

 

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