Chapter 6. Make Swift Work For You – Protocols and Generics
As we learned in Chapter 2, Building Blocks – Variables, Collections, and Flow Control, Swift is a strongly typed language, which means that every piece of data must have a type. Not only can we take advantage of this to reduce the clutter in our code, we can also leverage it to let the compiler catch bugs for us. The earlier we catch a bug, the better. Besides not writing them in the first place, the earliest place where we can catch a bug is when the compiler reports an error.
Two big tools that Swift provides to achieve this are called protocols and generics. Both of them use the type system to make our intentions clear to the compiler so that it can catch more bugs for us.
In this chapter, ...
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