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Swift Developer's Cookbook, The

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  • Copyright 2016
  • Dimensions: 7" x 9"
  • Edition: 1st
  • eBook (Watermarked)
  • ISBN-10: 0-13-439538-7
  • ISBN-13: 978-0-13-439538-8

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.

Sample Content

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      61
Maps and Chaining      61
Filtering nil Values with flatMap      62
Unmanaged Wrappers      62
Wrap-up      64
Chapter 4: Closures and Functions      65
Building a Function      65
Parameter Names      66
Label Conventions      66
Naming Methods and Functions      68
External and Local Parameters      69
Defaults      70
Constant and Variable Parameters      71
Modifying Parameters      72
Closures and Functions      73
Function Types      73
Using Tuple Arguments      74
Using Shorthand Argument Names      74
Inferred Closure Types      76
Parameter Type Inference      77
Declaring Type Aliases      78
Nested Functions      79
Tuples      80
From Tuples to Structs      82
Tuple Return Types      82
Variadic Parameters      83
Capturing Values      85
Autoclosures      87
Adding Default Closures      90
Currying      91
Why Curry?      92
Building Libraries      92
Partial Application      93
Currying Costs      94
Currying and Callbacks      94
Practical Currying      95
Passing Closures as Function Parameters      97
Wrap-up      99
Chapter 5: Generics and Protocols      101
Expanding to Generics      101
Protocols      102
Tokens      103
Type Constraints      104
Adopting Protocols      104
Declaring Protocols      105
Member Declarations      107
Building a Basic Protocol      109
Adding Protocol Default Implementations      110
Optional Protocol Requirements      111
Swift-Native Optional Protocol Requirements      112
Building Generic Types      113
Type Parameters      113
Generic Requirements      114
Conformance Requirements      115
Recipe: Same-Type Requirements      115
Generic Beautification      117
Legal Tokens      117
Matching Aliases      118
Protocol Alias Defaults      119
Collating Associated Types      119
Extending Generic Types      120
Using Protocols as Types      121
Protocol-Based Collections      121
Self Requirements      122
Protocol Objects and Self Requirements      123
Leveraging Protocols      124
Wrap-up      124
Chapter 6: Errors      125
Failing Hard      125
Fatal Errors      126
Assertions      126
Preconditions      127
Aborting and Exiting      128
Failing Gracefully      128
The ErrorType Protocol      129
Choosing Between Optionals and Error Handling      130
Swift Error Rules      130
Rule 1: Move Away from nil Sentinels      131
Rule 2: Use throw to Raise Errors      132
Rule 3: Use Error Types with Visible Access      133
Rule 4: Mark All Error-Participating Methods with throws      134
Rule 5: Use rethrows Consistently      134
Rule 6: Consume Errors Where They Matter      135
Rule 7: Terminate Threaded Error Chains      135
Building Errors      137
Good Errors      138
Naming Your Errors      138
Adding String Descriptions      139
Adding Reasons      139
Simplifying Output      140
Extending String      140
Type-Specific Errors      141
Retrieving Context      141
Contextualizing Strings      142
Contextualizing Throwing Types      143
Simplifying Contexts      144
Calling Throwing Functions      145
Using try      145
Error Propagation      147
Using try!      148
Using try?      148
Implementing Alternatives to try?      149
Guarding Results      151
Building a Printing Version of try?      151
Working with guard and defer      151
Wrap-up      153
Chapter 7: Types      155
Language Concepts      155
Reference and Value Types      155
Copy-and-Write-Back      156
Algebraic Data Types      157
Other Terminology      158
Enumerations      159
Basic Enumerations      159
Using Hash Values to Support Ranges      160
Raw Value Enumerations      162
Raw Value Members and Sequences      163
Associated Values      164
Indirect Values      165
Switches      166
Branching      166
Breaks      167
Fallthroughs      167
Complex Cases      169
Tuples      169
Pattern Matching with Value Bindings      169
where Clauses      170
Unwrapping Optional Enumerations      171
Embedding Values by Type      172
Option Sets      174
Revisiting NS_OPTIONS      174
Building Enumerations      175
Building Option Sets      176
Viewing Options      176
Classes      177
Optimization      178
Initializers      178
Initialization Steps      179
Designated and Convenience Initializers      179
Initialization Rules      179
Building Convenience Initializers      181
Failable and Throwing Initializers      181
Deinitializers      183
Property Observers      184
Getters/Setters and Access-Level Modifiers      185
Extensions and Overrides      186
Lazy Evaluation      187
Lazy Sequences      187
Lazy Properties      188
Wrap-up      188
Chapter 8: Miscellany      189
Statement Labels      189
Custom Operators      190
Declaring Operators      191
Conforming with Operators      192
Evaluating Operator Trade-offs      192
Array Indexing      193
Multi-indexed Array Access      194
Wrapped Indices      195
Array Slices      195
General Subscripting      196
Parameter-less Subscripting      197
String Utilities      198
Repeat Initializers      198
Strings and Radix      198
String Ranges      199
String Splitting      201
String Subscripts      201
Foundation Interoperability      203
Joining and Extending      203
Permutation Generator      203
Wrap-up      205
Index      207


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