Nodejs Array Shuffle shuffle()

Method Source Code

"use strict"//from   w  w  w. j a v a 2s.  c o m

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

Related

1. shuffle()

   Array.prototype.shuffle = function () {
       for (var j, x, i = this.length; i; j = Math.floor(Math.random() * i), x = this[--i], this[i] = this[j], this[j] = x);
       return this;
   };
   

2. shuffle()

   Array.prototype.shuffle = function() {
     let input = this;
     for (let i = input.length - 1; i >= 0; i--) {
       let randomIndex = Math.floor(Math.random() * (i + 1));
       let itemAtIndex = input[randomIndex];
       input[randomIndex] = input[i];
       input[i] = itemAtIndex;
     return input;
   ...
   

3. shuffle()

   Array.prototype.shuffle =  function() {
     var i, j, t;
     for (i = 1; i < this.length; i++) {
       j = Math.floor(Math.random()*(1+i));  
       if (j != i) {
         t = this[i];                        
         this[i] = this[j];
         this[j] = t;
   

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 i = this.length, j, temp;
       while (--i>0) {
           j=Math.floor(Math.random() * (i+1));
           temp=this[j];
           array[j]=this[i];
           array [i] = temp;
     return this;
   ...
   

6. shuffle()

   Array.prototype.shuffle = function () {
     for(var j, x, i = this.length; i; j = Math.floor(Math.random() * i), x = this[--i], this[i] = this[j], this[j] = x);
     return this;
   };
   

7. shuffle()

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

8. shuffle()

   Array.prototype.shuffle = function() {
      var len = this.length;
     var i = len;
      while (i--) {
        var p = parseInt(Math.random()*len);
       var t = this[i];
       this[i] = this[p];
       this[p] = t;
   };
   

9. shuffle()

   Array.prototype.shuffle = function() {
     var l = this.length + 1;
     while (l--) {
       var r = ~~(Math.random() * l);
       var o = this[r];
       this[r] = this[0];
       this[0] = o;
     return this;
   ...