Javascript Number downto(t, cb)

Number.prototype.downto = function (t, cb) {
  var i = this;/*from   ww  w.  j av a 2  s . c om*/

  if(t > this) {
    return +this;
  }

  while (i >= t) {
    cb(i--);
  }

  return +this;
};

// Ruby = 15.downto(10) { |i| puts i }
// JS   = (15).downto(10, function(i){console.log(i);})
Number.prototype.downto = function(t, cb) {
  var i = this;//from   ww  w . j  a  v  a  2  s.  c o  m
  if(t > this) return +this;
  while (i >= t) { cb(i--); }
  return +this;
};