Nodejs Array Shuffle shuffle()

Method Source Code

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;//w  w w  .j a  va  2s .c o m
  this.suit = suit;
}

function newDeck() {
  const deck = [];
  for(let i = 1; i < 14; i++){
    for(let j = 0; j < 4; j++){
      deck.push(new Card(i, suits[j]));
    }
  }
  return deck;
}

Array.prototype.shuffle = function() {
  let i = 0,
  j = 0,
  temp = null;

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

module.exports = newDeck;

Related

1. 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;
   };
   

2. 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;
   };
   

3. 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;
   };
   ...
   

4. 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)
   

5. 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];
   ...
   

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

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;
   };
   

8. 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;
   

9. 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;