StringAndArrayUtils.js

Array.prototype.shuffle = Array.prototype.shuffle || (function () {
    function shuffle(array) {
      var currentIndex = array.length
        , temporaryValue
        , randomIndex
        ;
    
      // While there remain elements to shuffle...
      while (0 !== currentIndex) {
    
        // Pick a remaining element...
        randomIndex = Math.floor(Math.random() * currentIndex);
        currentIndex -= 1;
    
        // And swap it with the current element.
        temporaryValue = array[currentIndex];
        array[currentIndex] = array[randomIndex];
        array[randomIndex] = temporaryValue;
      }
    
      return array;
    }
    return shuffle.call(this,this.slice());
});

String.prototype.reverse = function () {
    return Array.prototype.slice.call(this).reverse().join('');
}


String.prototype.scramble = function () {
    return Array.prototype.slice.call(this).shuffle().join('');
}