Nodejs Array Shuffle shuffle()

Method Source Code

Array.prototype.shuffle = function () {
   var i = this.length,
      j, t;//from   www. ja  v  a  2 s  . c o m
   var arr = this;
   while (i--) {
      j = Math.floor((i + 1) * Math.random());
      t = arr[i];
      arr[i] = arr[j];
      arr[j] = t;
   }
};

Related

1. shuffle()

   Array.prototype.shuffle = function() {
     this.push(this.shift());
     return this;
   

2. 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);
   };
   

3. 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;
   

4. shuffle()

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

5. shuffle()

   Array.prototype.shuffle=function() {
     var i=this.length,j,t;
     while(i--) {
       j=Math.floor((i+1)*Math.random());
       t=arr[i];
       arr[i]=arr[j];
       arr[j]=t;
   

6. shuffle()

   Array.prototype.shuffle = function() {
       for (var j, x, i = this.length - 1; i; j = randomNumber(i), x = this[--i], this[i] = this[j], this[j] = x);
       return this;
   };
   

7. shuffle()

   Array.prototype.shuffle = function () {
       var c = this.slice(0);
       for (var j, x, i = this.length; i; j = parseInt(Math.random() * i), x = this[--i], this[i] = this[j], this[j] = x);
       if (this.compare(c)) {
           this.shuffle();
       return this;
   }; 
   

8. shuffle()

   Array.prototype.shuffle = function(){
     var counter = this.length, temp, index;
       while (counter > 0){
         index = Math.floor(Math.random() * counter);
         counter--;
         temp = this[counter];
         this[counter] = this[index]
         this[index] = temp;
       };
   ...
   

9. shuffle()

   Array.prototype.shuffle = function(){
     var counter = this.length, temp, index;
     while (counter > 0) {
       index = (Math.random() * counter--) | 0;
       temp = this[counter];
       this[counter] = this[index];
       this[index] = temp;
     return this;
   ...