Question

How to replace a random word in a string with a random word from a list of words using Kotlin

Answer 1

import kotlin.random.Random

fun replaceRandomWord(text: String, replacements: List<String>): String {
    val words = text.split(" ").toMutableList()

    if (words.isEmpty() || replacements.isEmpty()) {
        return text // nothing to do
    }

    // Pick a random index in the sentence
    val idx = Random.nextInt(words.size)

    // Pick a random replacement word
    val newWord = replacements.random()

    // Replace it
    words[idx] = newWord

    // Rebuild the string
    return words.joinToString(" ")
}

fun main() {
    val text = "The quick brown fox jumps over the lazy dog"
    val replacementWords = listOf("c#", "c++", "java", "rust", "python")

    val result = replaceRandomWord(text, replacementWords)
    println(result)
}




/*
run:

The quick brown fox jumps over the lazy python

*/

 

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