This was a really dense chapter because we squeezed in content that usually needs at least a book to explain properly in only tens of pages.
We took a quick look at Swift and its capabilities, starting from the definitions of variables and constants and then how to define the control flow. After that, we moved on to structs and classes, seeing how they are similar in some ways but profoundly different as philosophies. Finally, we explored the new features of Swift 2.0, how to create simple objects for complex problems, and how to exploit functional patterns to build more readable programs.
Of course, simply after reading this chapter, nobody can be considered an expert in Swift. However, the information here is enough to let you understand all of the code we'll be using in the upcoming chapters to build several kinds of apps.
In the next chapter, we'll continue to explore Swift and iOS, and, finally, we'll implement a simple iOS app to start to understand how the environment works.