Nodejs Array Shuffle shuffle( b )

Method Source Code

Array.prototype.shuffle = function( b )
{
   var i = this.length, j, t;
   while( i )//  ww  w .  j av  a2s. com
   {
      j = Math.floor( ( i-- ) * Math.random() );
      t = b && typeof this[i].shuffle!=='undefined' ? this[i].shuffle() : this[i];
      this[i] = this[j];
      this[j] = t;
   }
   return this;
};

Related

1. shuffle()

   Array.prototype.shuffle = function () {
     return this.sort((a, b) => Math.random() > 0.5 ? 1 : -1)
   

2. shuffle()

   Array.prototype.shuffle = function() {
       var a = this;
       var j, x, i;
       for (i = a.length; i; i -= 1) {
           j = Math.floor(Math.random() * i);
           x = a[i - 1];
           a[i - 1] = a[j];
           a[j] = x;
       return a;
   };
   

3. shuffle()

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

4. 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;