Nodejs Array Shuffle shuffle()

Method Source Code

/** Shuffles this array. Returns self */
Array.prototype.shuffle = function () {
    var i, swap, ind;

    for (i = this.length - 1; i > 0; --i) {
        ind = parseInt(Math.random() * i);

        swap = this[i];/*from  www .ja va2s.  c  o  m*/
        this[i] = this[ind];
        this[ind] = swap;
    }

    return this;
};

Related

1. shuffle()

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

2. shuffle()

   Array.prototype.shuffle = function() {
      var len = this.length;
     var i = len;
      while (i--) {
        var p = parseInt(Math.random()*len);
       var t = this[i];
       this[i] = this[p];
       this[p] = t;
   };
   Array.prototype.filter_sort = function () {
     return this.sort(function(a,b){return a-b});
   };
   

3. shuffle()

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

4. 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;
   ...
   

5. 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;
   ...
   

6. shuffle()

   Array.prototype.shuffle = function () {
     var rand, value, i;
     if (!this || this.length === 0) { return this; }
     for (i = 0; i < this.length; i++) {
       rand        = Math.floor(Math.random() * i);
       value       = this[i];
       this[i]     = this[rand];
       this[rand]  = value;
     return this;
   };
   

7. shuffle()

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

8. shuffle()

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

9. 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;
   };