We have covered a lot up to this point in this book. Swift is not a small topic and app development itself is even bigger in magnitude than Swift. We learned most of Swift, but it would not have been practical for us to cover every little feature of the language, and also, Swift is still a new and evolving language. You will never be able to keep everything you've learned in your memory without referring to it later. You can always refer to this book, but Apple's documentation can be a great reference too. Beyond that, if you truly want to become a proficient Swift developer, you need to always learn and evolve to set yourself up for success. It is extremely hard to do this in a vacuum. The best way to ensure that you keep up with the times is to follow and participate in the community that is related to whichever topics interest you the most. In this chapter, we will go over how to use Apple's documentation and provide you some...