Nodejs Utililty Methods Array Shuffle

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

Array.prototype.shuffle = function() {
    for(var j, x, i = this.length; i; j = parseInt(Math.random() * i), x = this[--i], this[i] = this[j], this[j] = x);
    return this;
};
Array.prototype.shuffleC = function function_name() {
  var m = this.length, t, i;
  while (m) {
    i = Math.floor(Math.random() * m--);
    t = this[m];
...

const ranks = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13],
suits = ["heart", "club", "diamond", "spade"];
function Card(rank, suit) {
  this.rank = rank;
  this.suit = suit;
function newDeck() {
  const deck = [];
  for(let i = 1; i < 14; i++){
...

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;
};
console.log("#FFFEFA".split(", ").shuffle());

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;
};

Array.prototype.shuffle = function(){
   var new_arr = this.slice(0);
 for (var j, x, i = new_arr.length; i; j = Math.floor(Math.random() * i), x = new_arr[--i], new_arr[i] = new_arr[j], new_arr[j] = x);
   return new_arr;

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;

Array.prototype.shuffle = function() {
    if (Object.prototype.toString.call(this) !== '[object Array]') {
        throw new TypeError("`this` must be Array, not " + typeof this);
    var length = this.length;
    for (var i = length - 1; i >= 0; i--) {
        var randomIndex = Math.floor(Math.random() * length),
            temp = this[i];
        this[i] = this[randomIndex];
...

Array.prototype.shuffle = function(){
  var length = this.length;
  var i, j, temp;
  for(i = length - 1; i >= 0; i--){
    j = Math.floor(Math.random()*(i+1));
    temp = this[i];
    this[i] = this[j];
    this[j] = temp;
  return this;
};
var testArray = [1,2,3,4,5,6,7,8,9,10];
console.log(testArray.shuffle());
console.log(testArray);

Array.prototype.shuffle = function(){
  var result = [];
  while(this.length > 0 ){
    result.push( this.splice(Math.floor(Math.random() * this.length), 1)[0] );
  return result;
};