Nodejs Array Shuffle shuffle()

Method Source Code

// Add a way to shuffle an array
Array.prototype.shuffle = function() {
    var i = this.length, j, temp;
    if ( i == 0 ) {
        return this;
    }/*www.  j  a va 2s  . c om*/
    while ( --i ) {
        j         = Math.floor( Math.random() * ( i + 1 ) );
        temp      = this[ i ];
        this[ i ] = this[ j ];
        this[ j ] = temp;
    }
    return this;
};

Related

1. 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];
   ...
   

2. shuffle()

   Array.prototype.shuffle = function (){
       var temp,
       rand,
       round = Math.floor((Math.random() * (this.length*2)) + this.length);
       for (var i =0 ; round> i ; i++){
           rand = Math.floor(Math.random() * this.length);
           temp = this[rand];
           this.splice(rand, 1);
           this.push(temp);
   ...
   

3. shuffle()

   Array.prototype.shuffle = function(){
       var index1 = this.length, index2, temporary;
       while (--index1 > 0){
           index2 = Math.floor(Math.random() * (index1 + 1));
           temporary = this[index2];
           array[index2] = this[index1];
           array[index1] = temporary;
       return this;
   ...
   

4. shuffle()

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

5. shuffle()

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

6. shuffle()

   Array.prototype.shuffle = function () {
     var arr  = new Array();
     for (var i=0 ; i<this.length ; i++) {
       arr.push(this[i]);
     for(var j, x, i = arr.length; i; j = parseInt(Math.random() * i), x = arr[--i], arr[i] = arr[j], arr[j] = x);
     return arr;
   

7. shuffle()

   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;
   };
   

8. shuffle()

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

9. shuffle()

   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;
   };