Question

How to pick a random value from a map in Kotlin

Answer 1

import kotlin.random.Random

fun getRandomValue(inputMap: Map<Int, String>): String? {
    val values = inputMap.values.toList()
    
    return if (values.isNotEmpty()) values[Random.nextInt(values.size)] else null
}

fun main() {
    val myMap = mapOf(
        1 to "C++",
        2 to "C",
        3 to "Java",
        4 to "C#",
        5 to "Kotlin",
        6 to "Python"
    )

    val randomValue = getRandomValue(myMap)
    if (randomValue != null) {
        println("Random value: $randomValue")
    } else {
        println("Map is empty!")
    }
}

 
  
/*
run:
 
Random value: Java

*/

 

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