Express 3 Changes in res.json

example.js

// v0.6.19 way of returning JSON. 
exports.index = function(req, res) {
  Workout.find({}, function(err, docs) {
    if(!err) {
      res.json( { workouts: docs }, 200);  
    } else {
      res.json( { message: err }, 500);
    }
  });
}

// v0.8.0 way of returning JSON, note the change of order of params
exports.index = function(req, res) {
  Workout.find({}, function(err, docs) {
    if(!err) {
      res.json(200, { workouts: docs });  
    } else {
      res.json(500, { message: err });
    }
  });
}