Jumbler

gistfile1.js

function randomizeLetters(string) {
  var letters = string.split('');
  var result = '';
  while(letters.length)
    result += letters.splice(Math.floor(Math.random() * letters.length), 1)[0];
  return result;
}

function jumbleWord(word) {
  if (word.length < 3)
    return word;

  var first = word[0];
  var last = word[word.length-1];

  return first + randomizeLetters(word.slice(1, word.length - 1)) + last;
}

function jumble(string) {
  var jumbled = [];
  string.split(' ').forEach(function (w) { jumbled.push(jumbleWord(w)); });
  return jumbled.join(' ');
}