Congratulations, this was quite a journey! We've applied three key Julia concepts—modules, types and their constructors, and methods to develop the backend of our Six Degrees of Wikipedia game, and in the process we've seen how to interact with MySQL databases, persisting and retrieving our Article objects.
At the end of the next chapter, we'll get the chance to enjoy the fruits of our hard work: after we add a web UI to our Six degrees of Wikipedia backend, we'll relax by playing a few rounds. Let's see if you can beat my best score!
