Question

How to generate random string without repetition in Kotlin

Answer 1

import kotlin.random.Random

fun generateUniqueRandomString(total: Int): String {
    val chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
    val usedChars = mutableSetOf<Char>()
    val result = StringBuilder()

    while (result.length < total) {
        val randomIndex = Random.nextInt(chars.length)
        val randomChar = chars[randomIndex]
        if (randomChar !in usedChars) {
            result.append(randomChar)
            usedChars.add(randomChar)
        }
    }

    return result.toString()
}

fun main() {
    println(generateUniqueRandomString(15))
}




/*
run:
  
xDK9p07eghQwMSk
  
*/

 

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