Happy Numbers in JavaScript

happyNumbers.js

//2014-02-10 jorge@jorgechamorro.com     happy numbers

String.prototype.reduce= [].reduce;
Array.prototype.has= function has (n) { return this.indexOf(n) >= 0 };
Array.prototype.times= function (f,i) { for (i= this[0] ; i<=this[1] ; i++) f(i) };

function happy (n) {
  var past= [];
  while (1) {
    if ((n= n.toString().reduce(function(n,v){ return n+v*v },0)) === 1) return 1;
    if (past.has(n)) return 0; else past.push(n);
}}

[1,1000].times(function(n) { happy(n) && console.log(n) });