Beginning Swift by Morstol, Kare -- Read -- Imperial Library of Trantor

Index

Beginning Swift

Table of Contents Beginning Swift

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Preface

What This Book Covers What You Need for This Book Who This Book is for Conventions Reader Feedback Customer Support

Downloading the Example Code Errata Piracy Questions

1. Swift Basics

Lesson objectives Swift Program Structure

Hello, World!

Swift Variables and Constants

Declaring Swift Variables Variables Versus Constants Type Inference Variable Naming

Working with Variables

Tuples

Creating a Tuple

Optionals

Declaring an Optional Working with Optionals Optional nil Values Accessing Optional Values Force Unwrapping an Optional Conditionally Unwrapping Optionals

Using Optionals

The Swift guard Statement

Activity B: Variable Summary

Swift Data Types

Numeric Data Types

Int on 64-Bit Versus 32-Bit Platforms Built-In Numeric Data Types Choosing the Appropriate Numeric Data Type Declaring and Assigning Integer Variables Declaring and Assigning Floating Point Numbers Numeric Literal Grouping Numeric Type Conversions

Using Numeric Types

Boolean Character

Assigning a Character Constructing a Character Literal

String

Instantiating a String String Concatenation Extracting Characters String Length

Activity C: Data Type Summary

Enums

Basic Enum Syntax Enum with Raw Values Activity D: Using Swift Enums

Summary

2. Swift Operators and Control Flow

Lesson objectives Swift Operators

Assignment Operator Arithmetic Operators

Standard Arithmetic Operators Remainder Operator Unary minus Operator Compound Assignment Operators

Comparison Operators

Equality Inequality Comparison between Two Values

Ternary Conditional Operator Logical Operators Bitwise Operators Nil-Coalescing Operator Range Operators

Closed Range Operator Half-Open Range Operator One-Sided Range Operator

Activity A: Operators

Branching

The if Statement

Condition Lists Optional Unwrapping with if

The switch Statement

switch Statement Rules The break Keyword The fallthrough Keyword Matching Non-Scalar Values Multiple Patterns in a Single Case Using the where Statement within case Evaluating Optionals with a switch Statement

Activity B: Converting Code from if to switch

Loops

The for…in Statement

Iterating over Objects Iterating over Array Objects with index The for Loop where Clause The break Control Transfer Statement The continue Control Transfer Statement

The while Loop

The repeat…while Loop

Activity C: Implementing Loops

Summary

3. Functions, Classes, and Structs

Lesson Objectives Functions

Defining a Function Argument Labels Excluding Argument Labels Parameter Default Values Activity A: Implementing a Function Returning Values from Functions Using @discardableResult Function Attributes Variadic Parameters inout Parameters Recursion Functions as Parameters Closures

Creating a Function to Receive Content from an Asynchronous Web Service Call

Error Handling

The do…catch Statement Multiple catch Blocks Using do without catch The guard Statement Activity B: Exception Handling

Object-Oriented Features

Object-Oriented Principles Classes Versus Structs

Illustration

Defining Classes and Structures Activity C: Creating a Customer Struct and Class

Summary Challenge

4. Collections

Lesson Objectives Arrays

Working with Arrays Index

Utilizing Common Operations with Index

ArraySlice

Creating Slices Creating Slices Using Range Operators

Activity A: Working with Arrays

Sets

Working with Sets Combining Sets Comparing Sets Activity B: Removing Duplicates from a Sequence

Dictionaries

Working with Dictionaries Activity C: Using Dictionaries

Summary

5. Strings

Lesson Objectives String Fundamentals

Character Collection Index

Working with String Index

Debugging Activity A: All Indices of a Character

Using Strings

Creating Strings Common Operations

Implementing Extra Text Operations on a String

Activity B-1: All Ranges of a Substring Activity B-2: Counting Words, Sentences, and Paragraphs

Substring

Creating Substrings

Parsing Strings

Converting NSRange to Range Activity C: CamelCase

Summary

6. Functional Programming and Lazy Operations

Lesson Objectives Function Type Functional Methods

filter

Using the filter Method

map

Using the map Function

flatMap

Using the flatMap Function

reduce

Using the reduce Function

Activity A: Implementing Functional Programming

Lazy Operations

Lazy Sequences Sequence Internals Creating Lazy Operations

sequence(first:next:) sequence(state:next:)

Activity B: Implementing a Lazy Version of a Method

Swifty Code

Naming Organizing Code Miscellaneous

Writing Swifty Code

Summary Further Study Challenge

Index

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