Book Image

Swift Protocol-Oriented Programming - Fourth Edition

By : Jon Hoffman
Book Image

Swift Protocol-Oriented Programming - Fourth Edition

By: Jon Hoffman

Overview of this book

Protocol-oriented programming is an incredibly powerful concept at the heart of Swift's design. Swift's standard library was developed using POP techniques, generics, and first-class value semantics; therefore, it is important for every Swift developer to understand these core concepts and take advantage of them. The fourth edition of this book is improved and updated to the latest version of the Swift programming language. This book will help you understand what protocol-oriented programming is all about and how it is different from other programming paradigms such as object-oriented programming. This book covers topics such as generics, Copy-On-Write, extensions, and of course protocols. It also demonstrates how to use protocol-oriented programming techniques via real-world use cases. By the end of this book, you will know how to use protocol-oriented programming techniques to build powerful and practical applications.
Table of Contents (11 chapters)

Tuples

In Swift, a tuple is a finite, ordered, comma-separated list of elements. While there are tuples in other languages that I have used, I never really took advantage of them. To be honest, I was only vaguely aware that they actually existed in those other languages. In Swift, tuples are more prominent than they are in other languages, which forced me to take a closer look at them. What I found is that they are extremely useful.

In my opinion, tuples are one of the most underutilized types in Swift and, as we go through this book (especially in the case study section), I will point out some cases where the tuple type can be used.

We can create a tuple and access the information within it as follows:

let mathGrade1 = ("Jon", 100)  
let (name, score) = mathGrade1  
print("\(name) - \(score)")  

In the previous code, we grouped a String and an Integer into...