Nodejs Utililty Methods Array Shuffle

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() {
  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() {
  var s = [];
  while (this.length)
    s.push(this.splice(Math.random() * this.length, 1));
  while (s.length)
    this.push(s.pop());
  return this;

var binarySearch = function(needle, haystack) {
    var low = 0,
        high = haystack.length - 1;
    haystack.sort(function(x, y) {
        return x - y;
    });
    while (low <= high) {
        var middle = Math.floor((low + high) / 2);
        if (needle === haystack[middle])
...

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

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;

Array.prototype.shuffle = function () {
    for (var i = this.length - 1; i > 0; i--) {
        var j = Math.floor(Math.random() * (i + 1));
        var tmp = this[i];
        this[i] = this[j];
        this[j] = tmp;
    return this;
};
...

Array.prototype.shuffle = function() {
    var i = this.length;
      while(i){
          var j = Math.floor(Math.random()*i);
          var t = this[--i];
          this[i] = this[j];
          this[j] = t;
      return this;
...

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

Array.prototype.shuffle = function() {
    for (var i = 0; i < this.length; i++) {
        var j = Math.floor(Math.random() * (this.length - i) + i);
        var temp = this[i];
        this[i] = this[j];
        this[j] = temp;
};
String.prototype.capitalise = function() {
...