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
Table of Contents (19 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Dedication
Preface

Chapter 10. Best of Both Worlds and Combining FP Paradigms with OOP

"Objects are closures with multiple methods, closures are objects with a single method. So yes [OOP and FP can be used together]."                                                                                                          - Erik Meijer

In previous chapters, we talked mostly about Functional Programming (FP). We learned various techniques and paradigms of FP. In contrast, we barely touched on object-oriented programming (OOP). Mostly, we talked about the disadvantages of imperative programming. In practice, most of us have to work on applications that are designed by OOP principles. The reality is that even if we do not like OOP, we are stuck with it. For instance, in iOS and Mac OS development, we have to deal with Cocoa and Cocoa Touch frameworks that are designed by OOP principles.

On the other hand, we are familiar with OOP because most of us learned it at some point and some of us find it natural to model...