Nodejs Array Shuffle shuffle()

Method Source Code

// much more simple, aha
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;//w  w  w  .j ava 2s.  c  om
};

// a little more complicated but work the same.
Array.prototype.shuffleC = function function_name() {

  var m = this.length, t, i;

  while (m) {
    i = Math.floor(Math.random() * m--);
    t = this[m];
    this[m] = this[i];
    this[i] = t;
  }

  return this;

};

var arr = [12, 290, 278, 21,300, 89, 78, 100, 29, 7, 206];
console.log(arr);
console.log(arr.shuffle());
console.log(arr.shuffleC());

Related

1. shuffle()

   Array.prototype.shuffle = function () {
               var self = this,
                   n = self.length,
                   i,
                   j,
                   tmp;
               for (i = n - 1; i > 0; i -= 1) {
                   j = Math.floor(Math.random() * (i + 1));
                   tmp = self[i];
   ...
   

2. shuffle()

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

3. 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;
   };
   

4. 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;
   };
   ...
   

5. 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;
   function shuffle(array){
       return Array.prototype.shuffle.call(array)
   

6. 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++){
   ...
   

7. 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());
   

8. 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;
   };
   

9. 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;