In The Swift Developer’s Cookbook, renowned author Erica Sadun joins powerful strategies with ready-to-use Swift code for solving everyday development challenges. As in all of Sadun’s programming best-sellers, The Swift Developer’s Cookbook translates modern best practices into dozens of well-tested, easy-to-apply solutions. This book’s code examples were created in response to real-world questions from working developers to reflect Swift’s newest capabilities and best practices. Each chapter groups related tasks together. You can jump straight to your solution without having to identify the right class or framework first. Sadun covers key Swift development concepts, shows you how to write robust and efficient code, and helps you avoid common pitfalls other developers struggle with. She offers expert strategies for working with this immensely powerful language, taking into account Swift’s rapid evolution and its migration tools. Whether you’re moving to modern Swift from Objective-C, from older versions of the Swift language, or from the world of non-Apple languages, this guide will help you master both the “how” and “why” of effective Swift development. Industry recruiters are scrambling to find Swift developers who can solve real problems and produce effective working code. Get this book, and you’ll be ready. Coverage includes Writing effective Swift code that communicates clearly and coherently to the compiler, your team, and to “future you,” who will be maintaining this code Using Xcode to handle changes in Swift’s language constructs as the language evolves Building feedback, documentation, and output to meet your development and debugging needs Making the most of optionals and their supporting constructs Using closures to encapsulate state and functionality and treat actions as variables for later execution Leveraging control flow with innovative Swift-specific statements Working with all Swift types: classes, enumerations, and structures Using generics and protocols to build robust code that expands functionality beyond single types Making the most of the powerful Swift error system Working with innovative features such as array indexing, general subscripting, statement labels, custom operators, and more This book is part of the Pearson Content Update Program (CUP). As the technology changes, sections of this book will be updated or new sections will be added. The updates will be delivered to you via a free Web Edition of this book, which can be accessed with any Internet connection.

Table of Contents:
Preface     xiii How This Book Is Organized     xiii About the Sample Code     xiv Contacting the Author     xv Chapter 1: Welcome to Modern Swift      1 Migrating Code      2 How to Migrate      2 Migration Lessons      4 Using Swift      4 Compiled Applications      4 Frameworks and Libraries      5 Scripting      5 REPL      6 Playgrounds      7 Other Swift      8 Learning Swift      8 Wrap-up      9 Chapter 2: Printing and Mirroring      11 Basic Printing      11 Printing Multiple Items      12 Adding Item Separators      13 String Interpolation      13 Controlling Line Feeds      14 Recipe: Printing to Custom Destinations      15 Printing to Strings      16 Printing to Custom Output Streams      17 Recipe: Printing and String Formats      18 Swift and Format Specifiers      19 Format Limitations      19 Conditional Compilation      20 Debug Printing      21 Custom Stream Output      21 Recipe: Postfix Printing      23 Quick Looks      24 Quick Look for Custom Types      24 Quick Looks for Custom Types in Playgrounds      25 Playground Quick Looks      25 Creating Custom Quick Looks for Playgrounds      26 Built-in Quick Look Types      27 Third-Party Rendering      28 Using Dump Functions      30 Building Custom Mirrors      31 Recursive Reflection      32 Building Basic Mirror Descriptions Using Protocol Conformance      33 Adding Header Docs      35 Building Header Documentation      35 Markdown Support      36 Keywords      37 Special Swift Concerns      40 Adding Images to Header Docs      40 Wrap-up      41 Chapter 3: Optionals?!      43 Optionals 101      43 Unwrapping Optionals      45 Forced Unwrapping      45 Conditional Binding      46 Conditional Binding and Type Casts      46 Binding Cascades      48 guard Statements      50 Implicitly Unwrapped Optionals      51 Guarding Failable Initializers      52 Optionals and Sentinel Values      53 Coalescing      55 Optional Assignment      55 Optional Patterns      56 Optional Chaining      58 Selector Testing and Optional Chaining      59 Subscripts      60 Optional Mapping   &