Book Image

Beginning Swift

By : Rob Kerr, Kåre Morstøl
Book Image

Beginning Swift

By: Rob Kerr, Kåre Morstøl

Overview of this book

Take your first foray into programming for Apple devices with Swift.Swift is fundamentally different from Objective-C, as it is a protocol-oriented language. While you can still write normal object-oriented code in Swift, it requires a new way of thinking to take advantage of its powerful features and a solid understanding of the basics to become productive.
Table of Contents (10 chapters)

Swifty Code

When learning a new programming language, you're not just learning syntax, built-in libraries, tooling, terminology, formatting style, and so on. There is also a somewhat vaguely defined idea of what constitutes good code, a way of performing some tasks that fits well with the language and has evolved together with it over time. In Swift, such code is often referred to as Swifty code. This is in no way a well-defined term, and experts in the language may disagree on some points. Here, we will only cover things where there seems to be a consensus. The list is by no means exhaustive, and there are exceptions to many of these.

Many of these points are covered in Apple's official guidelines ( We strongly recommend reading it; it's a fairly short page and a very easy read.


Names of types and protocols are in UpperCamelCase. Everything else is in lowerCamelCase. This makes it easy to tell values...