Nodejs Array Shuffle shuffle()

Method Source Code

// shuffles (randomizes an array)
// e.g. myArray.shuffle()
Array.prototype.shuffle = function() {
  var currentIndex = this.length, temporaryValue, randomIndex;
  while (0 !== currentIndex) {
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;/*w  w w  .  j  ava 2s.  c o  m*/
    temporaryValue = this[currentIndex];
    this[currentIndex] = this[randomIndex];
    this[randomIndex] = temporaryValue;
  }
  return this;
}

// returns a deck of cards
// e.g. getDeck()
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() {
  // Your code goes here!
})

Related

1. 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;
   };
   ...
   

2. 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;
   

3. 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;
   

4. 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;
   ...
   

5. 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;
   };
   

6. 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;
   

7. 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 = {
   ...
   

8. 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;
   };
   

9. shuffle()

   Array.prototype.shuffle = function() {
     var i = this.length, j, tempi, tempj;
     if ( i == 0 ) return false;
     while ( --i ) {
        j       = Math.floor( Math.random() * ( i + 1 ) );
        tempi   = this[i];
        tempj   = this[j];
        this[i] = tempj;
        this[j] = tempi;
   ...