title: Add a dynamic property to a Mongoose result with _.each
body: <p>I want to dynamically add a property to each object of a Mongoose result, but it won't work as expected.</p>
  
  <pre><code>Font.find()
  .exec(function (err, fonts) {
  
      if(err) return res.send(err);
  
      _.each(fonts, function(item, i) {
          item.joined_name = item.name + item.style.replace(/\s/g, '');
          console.log(item.joined_name); // works fine
      });
  
      res.send(fonts); // `joined_name` property is nonexistant
  });
  </code></pre>
  
  <p>Must be simple, but I can't figure out why. Alternatives are welcome!</p>