Nodejs Array Shuffle shuffle()

Method Source Code

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];/*w  w w .  j  av a  2  s.  co m*/
     this[i] = this[j];
     this[j] = temp;
  }
  return this;
};

Related

1. shuffle()

   Array.prototype.shuffle = function () {
       for (var i = this.length - 1; i > 0; i--) {
           var j = Math.floor(Math.random() * (i + 1));
           var tmp = this[i];
           this[i] = this[j];
           this[j] = tmp;
       return this;
   

2. shuffle()

   Array.prototype.shuffle = function() {
       for ( var i = this.length-1; i > 0; i-- ) {
           var j = Math.floor( i * Math.random() );
           var tmp = this[ j ];
           this[ j ] = this[ i ];
           this[ i ] = tmp;
       return this;
   

3. shuffle()

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

4. shuffle()

   Array.prototype.shuffle = function() {
       for (var i=this.length-1; i>0; i--) {
           var j = Math.floor(Math.random()*(i+1));
           var tmp = this[i];
           this[i] = this[j];
           this[j] = tmp;
       return this;
   

5. 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 ];
       this[ j ] = temp;
     return this;
   

6. shuffle()

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

7. shuffle()

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

8. shuffle()

   Array.prototype.shuffle=function(){
      var l=this.length-1;
      for(var i=l; i>0; i--){
           var itemIndex=Math.floor(Math.random()*(i+1));
           var item=source[i];
        source[i] = source[itemIndex];
        source[itemIndex]=item;
      return source;
   ...
   

9. shuffle()

   Array.prototype.shuffle = function (){
       for(var rnd, tmp, i=this.length; i; rnd=parseInt(Math.random()*i), tmp=this[--i], this[i]=this[rnd], this[rnd]=tmp);
   };