Nodejs Array Shuffle shuffle()

Method Source Code

// http://javascript.about.com/library/blshuffle.htm
Array.prototype.shuffle = function()
{
   var s = [];/*from w  w w. j a va2  s.  c o m*/
   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;
};

Related

1. 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;
   };
   

2. 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;
   };
   ...
   

3. 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;
   

4. 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;
   

5. 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;
   ...
   

6. 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() {
   })
   

7. shuffle()

   Array.prototype.shuffle = function() {
         var tmp, rand;
         for(var i =0; i < this.length; i++){
                 rand = Math.floor(Math.random() * this.length);
                 tmp = this[i];
                 this[i] = this[rand];
                 this[rand] = tmp;
   

8. shuffle()

   Array.prototype.shuffle = function(){
     for (var i = 0; i < this.length; i++){
         var a = this[i];
         var b = Math.floor(Math.random() * this.length);
           this[i] = this[b];
           this[b] = a;
   module.exports = {
   ...
   

9. shuffle()

   Array.prototype.shuffle = function() {
       var size = this.length;
       for (var i = 0; i < size; i++) {
           var j = Math.floor(Math.random() * size);
           if (i !== j) {
               var tmp = this[i];
               this[i] = this[j];
               this[j] = tmp;
   };