old_contents: var express = require('express');
  var router = express.Router();
  
  router.get('/:topping/:qty', function (req, res) {
    var obj = req.params;
  
    res.render('templates/pizza', obj);
  });
  
  module.exports = router;
  
new_contents: var express = require('express');
  var router = express.Router();
  
  router.get('/', function (req, res) {
    var obj = {
      qty: req.query.qty || 1,
      topping: req.query.topping || 'cheese'
    };
  
    res.render('templates/pizza', obj);
  });
  
  module.exports = router;
  
subject: use query string for pizza route