Fragment string into random parts

Question

I need a JS script that fragments any string into random parts, let’s say I have a string:

x = "Deliciosogostoeobomgostodasnuvensseremfeitasdealgodao"

and after inserted in the script, it can be returned like this for example:

"Del icios ogos t oeobo mgosto das nuvensser emf eitasde a lgod ao"

Answer 1

I created a function that does this job, however, I advise you to test and optimize it before applying in a real case, even more when the string is too large. I would do this on the server-side and send the processed string to the client-side.

Behold:

function dividirStrPor(str, caractereDivisao, pedacos)
{
  var tam = str.length;

  for (var i = 0; i < pedacos; i++)
  {
    posicao = Math.floor(Math.random() * (tam - 0 + 1) + 0);

    str = str.slice(0, posicao) + caractereDivisao + str.slice(posicao);
  }

  return str;
}


var str = "Deliciosogostoeobomgostodasnuvensseremfeitasdealgodao";

var resultado = dividirStrPor(str, " ", 12);

console.log(resultado);

Exit:

D e lic iosogos t oeob omgostodas nuvensseremfe i t asdealgodao

The output changes at each function call due to the random position at which the split character will be inserted into the string.

See working on repl it..

Sources:

Javascript: How can I Insert a string at a specific index
Generate Random number between two Numbers in Javascript

Answer 2

You can achieve this by breaking the string into parts with a maximum of 9 characters (this you can change in the code you have 9) and adding to an array and then joining everything with join:

Example:

var x = "Deliciosogostoeobomgostodasnuvensseremfeitasdealgodao",
    x_novo = [];
while(x.length > 0){
   var rn1 = Math.floor(Math.random()*9)+1,
       parte = x.substring( x.charAt(0), rn1 );
   x_novo.push(parte);
   x = x.replace(parte,'');
}

x_novo = x_novo.join(" ");
console.log(x_novo);

Example without using array:

var x = "Deliciosogostoeobomgostodasnuvensseremfeitasdealgodao",
    x_novo = '';
while(x.length > 0){
   var rn1 = Math.floor(Math.random()*9)+1,
   parte = x.substring(x.charAt(0), rn1);
   x_novo += (x_novo.length > 0 ? ' ' : '')+parte;
   x = x.replace(parte, '');
}

console.log(x_novo);