// Implementation credits go to:
  // http://wiki.ecmascript.org/doku.php?id=harmony:egal
  
  'use strict';
  
  module.exports = function (x, y) {
  	return (x === y) ?
  			((x !== 0) || ((1 / x) === (1 / y))) :
  			((x !== x) && (y !== y)); //jslint: ignore
  };