Nodejs Array Shuffle shuffle()

Method Source Code

/**/*from   w  w w .ja  v a 2s.com*/
 * Shuffles the items in an array.
 * Source: http://stackoverflow.com/a/10142256/710630
 *
 * @returns {Array}
 */
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;
};

Related

1. 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;
   ...
   

2. shuffle()

   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;
   

3. shuffle()

   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;
   };
   ...
   

4. shuffle()

   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;
   ...
   

5. 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;
   ...
   

6. 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);
   ...
   

7. 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;
   ...
   

8. 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;
   ...
   

9. 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;
   };
   ...