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Swift Functional Programming

You're reading from   Swift Functional Programming Ease the creation, testing, and maintenance of Swift codes

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Product type Paperback
Published in Apr 2017
Publisher Packt
ISBN-13 9781787284500
Length 316 pages
Edition 2nd Edition
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Author (1):
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Dr. Fatih Nayebi Dr. Fatih Nayebi
Author Profile Icon Dr. Fatih Nayebi
Dr. Fatih Nayebi
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Toc

Table of Contents (12) Chapters Close

Preface 1. Getting Started with Functional Programming in Swift FREE CHAPTER 2. Functions and Closures 3. Types and Type Casting 4. Enumerations and Pattern Matching 5. Generics and Associated Type Protocols 6. Map, Filter, and Reduce 7. Dealing with Optionals 8. Functional Data Structures 9. Importance of Immutability 10. Best of Both Worlds and Combining FP Paradigms with OOP 11. Case Study - Developing an iOS Application with FP and OOP Paradigms

Benefits of immutability


We already know that immutability helps safety and performance, but in a real-world application development, immutability can provide us with more benefits, which will be explained in the following sections.

Thread safety

Immutable objects are useful in multi-threaded applications because multiple threads can act on the data of immutable objects without worrying about changes to the data by other threads.

As immutable objects are closed to change, it is safe to assume that they will stay unchanged while we access the object from different threads. This assumption simplifies most of the multithreading problems that are complex to solve and maintain. For instance, we do not need to think about synchronization/locking mechanisms at all.

Suppose that we have a mutable object that includes a mutable array of a type, for example, a Product class that has four properties:

struct Producer { 
    let name: String 
    let address: String 
} 

class Product { 
    var name: String...
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