Nodejs Utililty Methods Array Shuffle

Array.prototype.shuffle = function()
  var s = [];
  while (this.length) s.push(this.splice(Math.random() * this.length, 1));
  while (s.length) this.push(s.pop());
  return this;
};
Array.prototype.indexOf = function( element )
  for( var i in this )
    if( this[i] == element )
      return i;
  return -1;
};
String.prototype.copy = function()
  return this.substring( 0, this.length );
};
String.prototype.trim = function( ext )
  var chars = [
    " ", "\t", "\n", "\r"
  ];
  var s = this.copy();
  if( arguments.length > 0 ){
    for( var i in ext ){
      chars.push( ext[i] );
  while( chars.indexOf( s.charAt( 0 ) ) != -1 ){
    s = s.substring( 1, s.length );
  while( chars.indexOf( s.charAt( s.length-1 ) ) != -1 ){
    s = s.substring( 0, s.length-1 );
  return s;
};

Array.prototype.shuffle = function() {
  var currentIndex = this.length, temporaryValue, randomIndex;
  while (0 !== currentIndex) {
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;
    temporaryValue = this[currentIndex];
    this[currentIndex] = this[randomIndex];
    this[randomIndex] = temporaryValue;
  return this;
window.getDeck = function() {
  var ranks = [2, 3, 4, 5, 6, 7, 8, 9, 10, 'jack', 'queen', 'king', 'ace'];
  var suits = ['clubs', 'diamonds', 'hearts', 'spades'];
  var cards = [];
  ranks.forEach(function(rank, index) {
    suits.forEach(function(suit, index) {
      cards.push(rank + "_of_" + suit);
    });
  });
  return cards;
$(function() {
})

Array.prototype.shuffle = function() {
      var tmp, rand;
      for(var i =0; i < this.length; i++){
              rand = Math.floor(Math.random() * this.length);
              tmp = this[i];
              this[i] = this[rand];
              this[rand] = tmp;

Array.prototype.shuffle = function(){
  for (var i = 0; i < this.length; i++){
      var a = this[i];
      var b = Math.floor(Math.random() * this.length);
        this[i] = this[b];
        this[b] = a;
module.exports = {
...

Array.prototype.shuffle = function() {
    var size = this.length;
    for (var i = 0; i < size; i++) {
        var j = Math.floor(Math.random() * size);
        if (i !== j) {
            var tmp = this[i];
            this[i] = this[j];
            this[j] = tmp;
};

Array.prototype.shuffle = function() {
  var i = this.length, j, tempi, tempj;
  if ( i == 0 ) return false;
  while ( --i ) {
     j       = Math.floor( Math.random() * ( i + 1 ) );
     tempi   = this[i];
     tempj   = this[j];
     this[i] = tempj;
     this[j] = tempi;
...

Array.prototype.shuffle=function() {
  this.sort(function() { return Math.random()-0.5;});
};
Array.prototype.remove = function(from, to) {
  var array=this;
  var rest = array.slice((to || from) + 1 || array.length);
  array.length = from < 0 ? array.length + from : from;
  return array.push.apply(array, rest);
};
...

Array.prototype.shuffle = function() {
  var currentIndex = this.length, temporaryValue, randomIndex;
  while (0 !== currentIndex) {
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;
    temporaryValue = this[currentIndex];
    this[currentIndex] = this[randomIndex];
    this[randomIndex] = temporaryValue;
  return this;

Array.prototype.shuffle = function (){ 
    for(var j, x, i = this.length; i; j = Math.floor(Math.random() * i), x = this[--i], this[i] = this[j], this[j] = x);
    return this;
};
String.prototype.hashCode = function(){
  var hash = 5381;
  for (i = 0; i < this.length; i++) {
    char = this.charCodeAt(i);
    hash = ((hash<<5)+hash) + char;
...

Array.prototype.shuffle = function () {
  var i = this.length, j, temp;
  if ( i === 0 ) return false;
  while ( --i ) {
     j = Math.floor( Math.random() * ( i + 1 ) );
     temp = this[i];
     this[i] = this[j]; 
     this[j] = temp;