Nodejs Utililty Methods Array Shuffle

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

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

Array.prototype.shuffle = function()
  for(var i=0; i<this.length; i++)
    this.swap(i, parseInt(Math.random() * this.length));
};

Array.prototype.shuffle = function () {
    var i = this.length;
    while (1 < i--) {
        var j = Math.floor(Math.random() * (i+1));
        var a_j = this[j];
        this[j] = this[i];
        this[i] = a_j;
};
...

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

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

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

Array.prototype.shuffle = function() {
    var swapbucket = this.length, randomelem, tempswap, tempelem;
    while (swapbucket--) {
        randomelem = Math.floor(Math.random() * (swapbucket + 1));
        tempelem = this[randomelem];
        tempswap = this[swapbucket];
        this[randomelem] = tempswap;
        this[swapbucket] = tempelem;

Array.prototype.shuffle = function() {
    var counter = this.length, temp, index;
    while (counter--) {
        index = (Math.random() * counter) | 0;
        temp = this[counter];
        this[counter] = this[index];
        this[index] = temp;
};
...

Array.prototype.shuffle=function(){
  var i=this.length;
  if (i==0) return;
  while (--i){
    var rand=Math.floor(Math.random()*(i+1));
    tempI=this[i];
    tempRand=this[rand];
    this[i]=tempRand;
    this[rand]=tempI;
...