Nodejs Array Shuffle shuffle()

Method Source Code

Array.prototype.shuffle = function() {
    var i = this.length;
    while (--i) {
        var j = Math.floor(Math.random() * (i + 1))
        var temp = this[i];
        this[i] = this[j];/*w  w w . j a  v  a 2  s  .c o  m*/
        this[j] = temp;
    }

    return this; // for convenience, in case we want a reference to the array
};

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 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;
   

3. 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;
   };
   

4. 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;
   ...
   

5. 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;
   };
   

6. shuffle()

   Array.prototype.shuffle = function() {
     var array = this.slice();
     var current = this.length;
     var temp;
     var random;
     while(current !== 0) {
       random = Math.floor(Math.random() * current);
       current -= 1;
       temp = array[current];
   ...
   

7. 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;
     return this;
   

8. shuffle()

   if(Array.prototype.shuffle === undefined) {
       Array.prototype.shuffle = function() {
           var counter = this.length;
           while (counter > 0) {
               var temp;
               var index;
               index = Math.floor(Math.random() * counter);
               counter--;
               temp = this[counter];
   ...
   

9. 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;
   ...