Nodejs Array Shuffle shuffle()

Method Source Code

Array.prototype.shuffle = function() {
  var currentIndex = this.length, temporaryValue, randomIndex;
  // While there remain elements to shuffle...
  while (0 !== currentIndex) {

    // Pick a remaining element...
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;/*from  w  ww.j  av  a 2s .c o  m*/

    // And swap it with the current element.
    temporaryValue = this[currentIndex];
    this[currentIndex] = this[randomIndex];
    this[randomIndex] = temporaryValue;
  }
}

Related

1. shuffle()

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

2. shuffle()

   const ranks = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13],
   suits = ["heart", "club", "diamond", "spade"];
   function Card(rank, suit) {
     this.rank = rank;
     this.suit = suit;
   function newDeck() {
     const deck = [];
     for(let i = 1; i < 14; i++){
   ...
   

3. 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;
   };
   console.log("#FFFEFA".split(", ").shuffle());
   

4. 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;
   };
   

5. shuffle()

   Array.prototype.shuffle = function(){
      var new_arr = this.slice(0);
    for (var j, x, i = new_arr.length; i; j = Math.floor(Math.random() * i), x = new_arr[--i], new_arr[i] = new_arr[j], new_arr[j] = x);
      return new_arr;
   

6. shuffle()

   Array.prototype.shuffle = function() {
       if (Object.prototype.toString.call(this) !== '[object Array]') {
           throw new TypeError("`this` must be Array, not " + typeof this);
       var length = this.length;
       for (var i = length - 1; i >= 0; i--) {
           var randomIndex = Math.floor(Math.random() * length),
               temp = this[i];
           this[i] = this[randomIndex];
   ...
   

7. shuffle()

   Array.prototype.shuffle = function(){
     var length = this.length;
     var i, j, temp;
     for(i = length - 1; i >= 0; i--){
       j = Math.floor(Math.random()*(i+1));
       temp = this[i];
       this[i] = this[j];
       this[j] = temp;
     return this;
   };
   var testArray = [1,2,3,4,5,6,7,8,9,10];
   console.log(testArray.shuffle());
   console.log(testArray);
   

8. shuffle()

   Array.prototype.shuffle = function(){
     var result = [];
     while(this.length > 0 ){
       result.push( this.splice(Math.floor(Math.random() * this.length), 1)[0] );
     return result;
   };
   

9. shuffle()

   Array.prototype.shuffle = function(){
     for (var i = 0; i < this.length; i++){
         var a = this[i];
         var b = Math.floor(Math.random() * this.length);
         this[i] = this[b];
         this[b] = a;
   function shuffleProperties(obj) {
   ...