Book Image

Swift Functional Programming - Second Edition

By : Dr. Fatih Nayebi
Book Image

Swift Functional Programming - Second Edition

By: Dr. Fatih Nayebi

Overview of this book

Swift is a multi-paradigm programming language enabling you to tackle different problems in various ways. Understanding each paradigm and knowing when and how to utilize and combine them can lead to a better code base. Functional programming (FP) is an important paradigm that empowers us with declarative development and makes applications more suitable for testing, as well as performant and elegant. This book aims to simplify the FP paradigms, making them easily understandable and usable, by showing you how to solve many of your day-to-day development problems using Swift FP. It starts with the basics of FP, and you will go through all the core concepts of Swift and the building blocks of FP. You will also go through important aspects, such as function composition and currying, custom operator definition, monads, functors, applicative functors,memoization, lenses, algebraic data types, type erasure, functional data structures, functional reactive programming (FRP), and protocol-oriented programming(POP). You will then learn to combine those techniques to develop a fully functional iOS application from scratch

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Table of Contents (19 chapters)
Title Page
Title Page
Credits
Credits
About the Author
About the Author
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Customer Feedback
Customer Feedback
Dedication
Dedication
Preface
Preface
Free Chapter
1
Getting Started with Functional Programming in Swift
Getting Started with Functional Programming in Swift
Why functional programming matters
What is FP?
The Swift programming language
Summary
2
Functions and Closures
Functions and Closures
What is a function?
Syntax
Pure functions
Function types
First-class functions
Higher-order functions
Function composition
Closures
Function currying
Recursion
Memoization
Summary
3
Types and Type Casting
Types and Type Casting
Kinds of types
Value versus reference types
Equality versus identity
Equatable and Comparable
Type checking and casting
Summary
4
Enumerations and Pattern Matching
Enumerations and Pattern Matching
Defining enumerations
Algebraic data types
Pattern matching
Summary
5
Generics and Associated Type Protocols
Generics and Associated Type Protocols
What are Generics and what kind of problems do they solve?
Type constraints
Generic data structures
Associated type protocols
Type erasure
Extending Generic types
Subclassing Generic classes
Generics manifesto
Summary
6
Map, Filter, and Reduce
Map, Filter, and Reduce
Higher-kinded types
The map function
The flatMap method
The filter function
The reduce function
The apply function
The join function
Chaining higher-order functions
The zip function
Practical examples
Summary
7
Dealing with Optionals
Dealing with Optionals
Optional types
Unwrapping optionals
Guard
Implicitly-unwrapped optionals
Nil-coalescing
Optional chaining
Dealing with Optionals' functionally
Error handling
Summary
8
Functional Data Structures
Functional Data Structures
Semigroups
Monoids
Trees
Lists
Stacks
Lazy lists
Summary
9
Importance of Immutability
Importance of Immutability
Immutability
Immutable variables
Reference types versus value types
Benefits of immutability
Cases for mutability
An example
Copy constructors and lenses
Summary
10
Best of Both Worlds and Combining FP Paradigms with OOP
Best of Both Worlds and Combining FP Paradigms with OOP
OOP paradigms
OOP design principles
POP
Functional reactive programming
Mixing OOP and FP
Summary
11
Case Study - Developing an iOS Application with FP and OOP Paradigms
Case Study - Developing an iOS Application with FP and OOP Paradigms
Requirements
High-level design
Backend development
iOS application development
Summary

About the Author

Dr. Fatih Nayebi has more than 15 years of industry experience in software engineering and architecture in various fields. He has developed numerous applications with Visual Basic, C++, C#, Java, MATLAB, Python, Objective-C, and Swift. He has been designing and developing enterprise and consumer iOS applications since the release of first iOS SDK. He is also an enthusiastic Node, Scala, and Haskell developer.

Aside from industry, Fatih earned his Ph.D. degree in software engineering from École de technologie supérieure, Université du Québec by researching on Mobile Human-Computer Interaction, Software Engineering, and Machine Learning.

His specialties include applied predictive and optimization models, human-computer interaction, functional programming, machine learning, and mobile application architecture and development.

Fatih currently works as a Director, Consulting at CGI Group Inc, Montreal, and continues to his academic research and publications as a postdoctoral researcher at École de technologie supérieure.

You can find him talking on Swift and Functional Programming at meetups such as http://www.meetup.com/swift-mtl/, on GitHub at https://github.com/conqueror, on Twitter as @thefatih, and on Instagram as @thefatih.

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