Nodejs Array Shuffle shuffle()

Method Source Code

// shuffles (randomizes an array)
Array.prototype.shuffle = function() {
  var currentIndex = this.length, temporaryValue, randomIndex;
  while (0 !== currentIndex) {
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;//from www  . j  ava  2s  . c o  m
    temporaryValue = this[currentIndex];
    this[currentIndex] = this[randomIndex];
    this[randomIndex] = temporaryValue;
  }
  return this;
}

Related

1. shuffle()

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

2. shuffle()

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

3. shuffle()

   Array.prototype.shuffle = function() {
       for (var i = 0; i < this.length; i++) {
           var j = Math.floor(Math.random() * (this.length - i) + i);
           var temp = this[i];
           this[i] = this[j];
           this[j] = temp;
   };
   String.prototype.capitalise = function() {
   ...
   

4. shuffle()

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

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() {
      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;
   ...
   

7. 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;
   

8. shuffle()

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

9. 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;
   };