Nodejs Array Shuffle shuffle()

Method Source Code

/* //from   w ww .  j  a  v a2  s  .  c o m
To test:

var array = [1,2,3,4,5,6,7,8,9];
console.log(array.shuffle()); // something like this [1, 2, 6, 4, 3, 5, 9, 8, 7]

*/

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

Related

1. 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;
   };
   

2. 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;
   

3. 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;
   

4. 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;
   };
   

5. 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;
   };
   

6. 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;
   ...
   

7. 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);
   };
   

8. shuffle()

   Array.prototype.shuffle = function() { 
       var arr = this, elm, inc, length = arr.length;
       while (length) {
           inc = Math.floor(Math.random() * length--);
           elm = arr[length];
           arr[length] = arr[inc];
           arr[inc] = elm;
       return arr; 
   ...
   

9. shuffle()

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