Summary

In this chapter, we've learned about the difference between classes and structures and when you would use one type rather than another, as well as the characteristics of value types and reference types and how each type is allocated at runtime. We went into some of the implementation details for the array, dictionary, and set collection types that are implemented in the Swift standard library. And while not actually a collection type, we also discussed tuples and the two different types Swift supports.

We discussed how Swift interoperates with Objective-C and the C system libraries, and how Swift has added a feature called failable initialization so it can provide backward compatibility with Objective-C. Then we discussed some of the differences in how you call methods in Swift versus sending a message to an Objective-C receiver, as well as the different types of dispatching methods Swift supports. We saw how Swift supports bridging between the native Swift and Objective-C types and...