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  • Book Overview & Buying Mastering Swift 5.3
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Mastering Swift 5.3

Mastering Swift 5.3

By : Jon Hoffman
3.7 (15)
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Mastering Swift 5.3

Mastering Swift 5.3

3.7 (15)
By: Jon Hoffman

Overview of this book

Over the years, Mastering Swift has proven itself among developers as a popular choice for an in-depth and practical guide to the Swift programming language. This sixth edition comes with the latest features, an overall revision to align with Swift 5.3, and two new chapters on building swift from source and advanced operators. From the basics of the language to popular features such as concurrency, generics, and memory management, this in-depth guide will help you develop your expertise and mastery of the language. As you progress, you will gain practical insights into some of the most sophisticated elements in Swift development, including protocol extensions, error handling, and closures. The book will also show you how to use and apply them in your own projects. In later chapters, you will understand how to use the power of protocol-oriented programming to write flexible and easier-to-manage code in Swift. Finally, you will learn how to add the copy-on-write feature to your custom value types, along with understanding how to avoid memory management issues caused by strong reference cycles. By the end of this Swift book, you will have mastered the Swift 5.3 language and developed the skills you need to effectively use its features to build robust applications.
Table of Contents (23 chapters)
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21
Other Books You May Enjoy
22
Index

Set

The set type is a generic collection that is similar to the array type. While the array type is an ordered collection that may contain duplicate items, the set type is an unordered collection where each item must be unique.

Like the key in a dictionary, the type stored in an array must conform to the Hashable protocol. This means that the type must provide a way to compute a hash value for itself. All of Swift's basic types, such as String, Double, Int, and Bool, conform to this protocol and can be used in a set by default.

Let's look at how we would use the set type.

Initializing a set

There are a couple of ways to initialize a set. Just like the array and dictionary types, Swift needs to know what type of data is going to be stored in it. This means that we must either tell Swift the type of data to store in the set or initialize it with some data so that it can infer the data type.

Just like the array and dictionary types, we use the var and let...

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