Nodejs Array Shuffle shuffle()

Method Source Code

//+ Jonas Raoni Soares Silva
//@ http://jsfromhell.com/array/shuffle [v1.0]
Array.prototype.shuffle = function (){ //v1.0
    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;/*from  w  ww .  j  a  v  a  2 s.c  o m*/
};

String.prototype.hashCode = function(){
   // See http://www.cse.yorku.ca/~oz/hash.html      
   var hash = 5381;
   for (i = 0; i < this.length; i++) {
      char = this.charCodeAt(i);
      hash = ((hash<<5)+hash) + char;
      hash = hash & hash; // Convert to 32bit integer
   }
   return hash;
}

Number.prototype.mod = function(n) {
   return ((this%n)+n)%n;
}

Related

1. 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;
   module.exports = {
   ...
   

2. shuffle()

   Array.prototype.shuffle = function() {
       var size = this.length;
       for (var i = 0; i < size; i++) {
           var j = Math.floor(Math.random() * size);
           if (i !== j) {
               var tmp = this[i];
               this[i] = this[j];
               this[j] = tmp;
   };
   

3. shuffle()

   Array.prototype.shuffle = function() {
     var i = this.length, j, tempi, tempj;
     if ( i == 0 ) return false;
     while ( --i ) {
        j       = Math.floor( Math.random() * ( i + 1 ) );
        tempi   = this[i];
        tempj   = this[j];
        this[i] = tempj;
        this[j] = tempi;
   ...
   

4. shuffle()

   Array.prototype.shuffle=function() {
     this.sort(function() { return Math.random()-0.5;});
   };
   Array.prototype.remove = function(from, to) {
     var array=this;
     var rest = array.slice((to || from) + 1 || array.length);
     array.length = from < 0 ? array.length + from : from;
     return array.push.apply(array, rest);
   };
   ...
   

5. 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;
   

6. shuffle()

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

7. shuffle()

   Array.prototype.shuffle = function() {
     var i = this.length, j, tempi, tempj;
     if ( i == 0 ) return false;
     while ( --i ) {
        j       = Math.floor( Math.random() * ( i + 1 ) );
        tempi   = this[i];
        tempj   = this[j];
        this[i] = tempj;
        this[j] = tempi;
   ...
   

8. 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;
   

9. shuffle()

   Array.prototype.shuffle = function() {
     var s = [];
     while (this.length)
       s.push(this.splice(Math.random() * this.length, 1));
     while (s.length)
       this.push(s.pop());
     return this;