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📘 Understanding Swift

A guide to understanding the Swift programming language, designed to answer common questions and explain key features in a practical context. This book is aimed at helping both beginners and experienced developers deepen their understanding of Swift.

Details

URL: 🔗 https://www.hackingwithswift.com/quick-start/understanding-swift

Published: June 5, 2020

Authors: Paul Hudson

Tags:
Swift, Programming, iOS Development, Reference Guide

Key Points​

  • Detailed explanations of fundamental and advanced Swift concepts
  • Answers to common questions about Swift programming
  • Practical examples and contextual understanding
  • Covers simple and complex data types, operators, conditions, loops, functions, closures, structs, classes, protocols, extensions, and optionals

Summary of Contents​

  • Introduction:

    • Overview of the book’s purpose and structure
    • Differences between Swift and SwiftUI

  • Simple Types:

    • Variables, type safety, multi-line strings, doubles and integers, string interpolation, constants, and type annotations

  • Complex Types:

    • Arrays, sets, tuples, dictionaries, enums, associated values, and raw values

  • Operators and Conditions:

    • Arithmetic operations, remainder operator, operator overloading, compound assignment operators, comparison of data types, if and else if, multiple conditions, ternary operator, switch statements, and range operators

  • Looping:

    • Usage of underscores with loops, while loops, repeat loops, exiting loops, labeled statements, break and continue, and infinite loops

  • Functions:

    • Defining functions, parameters, return keywords, returning multiple values, parameter labels, default parameters, variadic functions, throwing functions, try keyword, inout parameters

  • Closures:

    • Introduction to closures, parameters, return values, trailing closure syntax, shorthand parameter names, capturing values

  • Structs:

    • Differences between structs and tuples, computed properties, stored properties, property observers, methods, mutating methods, strings as structs, memberwise initializers, self keyword, lazy properties, static properties and methods, access control

  • Classes:

    • Differences between classes and structs, initializers, method overriding, final classes, data sharing, deinitializers, and mutable properties in constant classes

  • Protocols and Extensions:

    • Protocol inheritance, extensions, protocol-oriented programming, and protocol extensions

  • Optionals:

    • Usage of optionals, unwrapping optionals, guard let vs. if let, force unwrapping, implicitly unwrapped optionals, nil coalescing, optional chaining, optional try, failable initializers, and type casting

Conclusion​

  • Encourages continued learning and exploration of Swift
  • Emphasizes the importance of understanding why Swift features are designed the way they are
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