Nodejs Array Shuffle shuffle()

Method Source Code

// REF: http://stackoverflow.com/a/2450976/487544
Array.prototype.shuffle = function() {
    var currentIndex = this.length, temporaryValue, randomIndex;

    // While there remain elements to shuffle...
    while (0 !== currentIndex) {

        // Pick a remaining element...
        randomIndex = Math.floor(Math.random() * currentIndex);
        currentIndex -= 1;/*from   w w  w .ja  v a 2  s.co  m*/

        // And swap it with the current element.
        temporaryValue = this[currentIndex];
        this[currentIndex] = this[randomIndex];
        this[randomIndex] = temporaryValue;
    }

    return this;
}

Related

1. shuffle()

   'use strict';
   Array.prototype.shuffle = function() {
     var arr = this.slice(0);
     var counter = this.length,
       temp, index;
     while (counter > 0) {
       index = Math.floor(Math.random() * counter);
       counter--;
       temp = arr[counter];
   ...
   

2. shuffle()

   Array.prototype.shuffle=function() {
     this.sort(function() {return Math.random()-0.5; });
   

3. shuffle()

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

4. shuffle()

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

5. shuffle()

   Array.prototype.shuffle = function () {
     var l = this.length + 1;
     while (l--) {
       var r   = ~~(Math.random() * l), o = this[r];
       this[r] = this[0];
       this[0] = o;
     return this;
   };
   ...
   

6. shuffle()

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

7. 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;
   ...
   

8. shuffle()

   Array.prototype.shuffle = function()
     var s = [];
     while (this.length) s.push(this.splice(Math.random() * this.length, 1));
     while (s.length) this.push(s.pop());
     return this;
   };
   Array.prototype.indexOf = function( element )
     for( var i in this )
       if( this[i] == element )
         return i;
     return -1;
   };
   String.prototype.copy = function()
     return this.substring( 0, this.length );
   };
   String.prototype.trim = function( ext )
     var chars = [
       " ", "\t", "\n", "\r"
     ];
     var s = this.copy();
     if( arguments.length > 0 ){
       for( var i in ext ){
         chars.push( ext[i] );
     while( chars.indexOf( s.charAt( 0 ) ) != -1 ){
       s = s.substring( 1, s.length );
     while( chars.indexOf( s.charAt( s.length-1 ) ) != -1 ){
       s = s.substring( 0, s.length-1 );
     return s;
   };
   

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;
     return this;
   window.getDeck = function() {
     var ranks = [2, 3, 4, 5, 6, 7, 8, 9, 10, 'jack', 'queen', 'king', 'ace'];
     var suits = ['clubs', 'diamonds', 'hearts', 'spades'];
     var cards = [];
     ranks.forEach(function(rank, index) {
       suits.forEach(function(suit, index) {
         cards.push(rank + "_of_" + suit);
       });
     });
     return cards;
   $(function() {
   })