Question

How to replace a random word in a string with a random word from an array of words using Swift

Answer 1

import Foundation

func replaceRandomWord(_ text: String, with replacements: [String]) -> String {
    var words = text.split(separator: " ").map(String.init)

    guard !words.isEmpty, !replacements.isEmpty else {
        return text   // nothing to do
    }

    // Pick random index in the sentence
    let idx = Int.random(in: 0..<words.count)

    // Pick random replacement word
    if let newWord = replacements.randomElement() {
        words[idx] = newWord
    }

    // Rebuild the string
    return words.joined(separator: " ")
}

let text = "The quick brown fox jumps over the lazy dog"
let replacementWords = ["c#", "c++", "java", "rust", "python"]

let result = replaceRandomWord(text, with: replacementWords)
print(result)



/*
run:

The quick brown fox jumps over c++ lazy dog

*/

 

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