Nodejs Array Shuffle shuffle()

Method Source Code

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

        elm = arr[length];//from   w ww .jav  a  2 s .  c om
        arr[length] = arr[inc];
        arr[inc] = elm;
    }
 
    return arr; 
};

Related

1. 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;
   };
   

2. 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;
   };
   

3. shuffle()

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

4. 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;
   ...
   

5. 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);
   };
   

6. 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;
   };
   ...
   

7. shuffle()

   Array.prototype.shuffle = function() {
     var m = this.length, i;
     while (m) {
       i = (Math.random() * m--) >>> 0;
       [this[m], this[i]] = [this[i], this[m]]
     return this;
   };
   

8. shuffle()

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

9. shuffle()

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