title: Response not return full object after filter [Express.js]
body: <p>I have in function like this:</p>
  
  <pre><code>var newConvs = [];
          var tmp;
  
          convs.filter(function (conv) {
  
              tmp = conv;
  
  
              conv = conv.conversation;
  
              conv.reciver = tmp.reciver;
              conv.conversationId = tmp._id;
  
              newConvs.push(conv);
          });
  
          console.log(newConvs);
          res.json({
              message: newConvs
          });
  </code></pre>
  
  <p>When I <code>console.log(newConvs)</code> it return full object, but in <code>res.json...</code> I don't get this 2: <code>conv.reciver = tmp.reciver;
  conv.conversationId = tmp._id;</code></p>
  
  <p>Anyone know what is reason?</p>