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i've searched a lot but havent found exactly what i am trying to do. But here goes:

I want to input a sentence / string in javascript and output all randomized variations of that sentence.

Example input: 'my test sentence 123' output: 'test my sentence 123', 'my sentence 123 test', '123 sentence my test', and so on, and stop when theres no variations left.

I've split the sentence into words in an array, but im a bit stuck on how to proceed to randomize the words and join them to new sentences in a list or new array.

code so far:

    let str = "my test sentence 123";
    let words = str.split(" ");
    for (let i = 0; i < words.length - 1; i++) {
    words[i] += " ";
    }

A bit stuck on how to proceed. My thought process is: I have the words variable / array, but i need to randomize each word, output new strings but also check the existing ones so i don't duplicate any of them.

Thanks for all help i can get to learn more :)

Sentry
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    FYI, generating all permutations has nothing to do with random. The permutations output will be totally predictable. Random implies unpredictable. – Peter B Sep 26 '21 at 20:43
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    Does this answer your question? [Permutations in JavaScript?](https://stackoverflow.com/questions/9960908/permutations-in-javascript) – Peter B Sep 26 '21 at 20:51

2 Answers2

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As you are on Javascript, using .join(' ') will be easier to create a string from an array.

Then, there is a lot of solutions to achieve what you want to do, the easier way would be a foreach on foreach, where you simply test if the string you created already exists in the array.

It would be the easy way, but the more you put items, the more you will need power, so use this solution wisely.

Something like this can work :

var stringToSplit = 'I want to split this'

var stringSplitted = stringToSplit.split(' ')

var arrayOfNewStrings = []

stringSplitted.forEach(word => {
    var arrayOfString = []
    arrayOfString.push(word)
    stringSplitted.forEach(otherWord => {
        if(word !== otherWord)
        arrayOfString.push(otherWord)
    })
    arrayOfNewStrings.push(arrayOfString)
});

console.log(arrayOfNewStrings)

You then need to add a layer of for/foreach to make it for every words (this will work only for the first one), and to test if the array already exists in ArrayOfNewStrings to prevent duplication.

Walid M.
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Check this code

    var phrase = "my test sentence 123";
    var words = phrase.toLowerCase().match(/\w+/g);
    var wordsCopy = phrase.toLowerCase().match(/\w+/g);

    // First of all I loop each word
    words.forEach(function(word, index){
        // Random word going to contain my randomized word
        var randomWord = word;
      
      // Copy the entire phrase
      var wordsMissing = wordsCopy.slice();
      
      // Remove the current word
      wordsMissing.splice(wordsCopy.indexOf(word), 1);
      
      // Loop tru my missing words
      for (var i = 0; i < wordsMissing.length; i++) {
        // Set my random word with the rest of the words
        randomWord += " " + wordsMissing.join(" ");
        
        // get the first word and send to the final of my original phrase
        var firstWord = wordsMissing.splice(0,1)[0];  
        wordsMissing.push(firstWord);
        
        // Log my random word
        console.log(randomWord);
        
        // Reset random word to the initial word
        randomWord = word;
      }
    });
Charles Xavier
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