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Reactive Programming with Swift 4
Reactive Programming with Swift 4

Reactive Programming with Swift 4: Build asynchronous reactive applications with easy-to-maintain and clean code using RxSwift and Xcode 9

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Reactive Programming with Swift 4

FRP Fundamentals, Terminology, and Basic Building Blocks

This chapter will introduce you to the basic building blocks that form the foundation of RxSwift as a library. We will introduce two different types of programming styles, the imperative and declarative style of doing things in code, and then establish the sweet spot between the two styles where RxSwift sits to take advantage of both programming paradigms.

We will elaborate on what functional reactive programming is and how you can adapt your code for it. The main topics covered in this chapter are as listed:

  • Functional reactive programming: Basic building blocks, concepts, and frequently used terms
  • Marble diagrams
  • Railway-oriented programming

Functional reactive programming

Every programming language or technical domain has some kind of pictorial representation to explain certain concepts and make things easier to translate in logical pictorial representations. Similarly, we can express certain reactive concepts in logical pictorial representations. In this book, you will see the use of diagrams to represent functional and reactive concepts and hence it becomes important to have a basic understanding of these diagrams and how you can read them to understand the programming concept they want to showcase. In subsequent sections, we will give a brief introduction to the different types of Logical diagrams. You will get to learn more about concepts like state, side effects, signals, events, and so on in the later half of the chapter. Understanding these concepts is very important because these concepts form smaller elements...

Summary

This chapter covered the gist of the concepts that form the basics of functional reactive programming paradigm. In the coming chapters, we will see all the components that were discussed in this chapter in action. We will start with unique implementations and then gradually bundle them together to make a full-blown app. So stay tuned, we are about to write a lot of code and this time, in declarative style!

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Key benefits

  • Build fast and scalable apps with RxSwift
  • Apply reactive programming to solve complex problems and build efficient programs with reactive user interfaces
  • Take expressiveness, scalability, and maintainability of your Swift code to the next level with this practical guide

Description

RxSwift belongs to a large family of Rx implementations in different programming languages that share almost identical syntax and semantics. Reactive approach will help you to write clean, cohesive, resilient, scalable, and maintainable code with highly configurable behavior. This book will introduce you to the world of reactive programming, primarily focusing on mobile platforms. It will tell how you can benefit from using RxSwift in your projects, existing or new. Further on, the book will demonstrate the unbelievable ease of configuring asynchronous behavior and other aspects of the app that are traditionally considered to be hard to implement and maintain. It will explain what Rx is made of, and how to switch to reactive way of thinking to get the most out of it. Also, test production code using RxTest and the red/ green approach. Finally, the book will dive into real-world recipes and show you how to build a real-world app by applying the reactive paradigm. By the end of the book, you’ll be able to build a reactive swift application by leveraging all the concepts this book takes you through.

Who is this book for?

This book is for the developers who are familiar with Swift and iOS application development and are looking out to reduce the complexity of their apps. Prior experience of reactive programming is not necessary.

What you will learn

  • Understand the practical benefits of Rx on a mobile platform
  • Explore the building blocks of Rx, and Rx data flows with marble diagrams
  • Learn how to convert an existing code base into RxSwift code base
  • Learn how to debug and test your Rx Code
  • Work with Playgrounds to transform sequences by filtering them using map, flatmap and other operators
  • Learn how to combine different operators to work with Events in a more controlled manner.
  • Discover RxCocoa and convert your simple UI elements to Reactive components
  • Build a complete RxSwift app using MVVM as design pattern

Product Details

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Publication date, Length, Edition, Language, ISBN-13
Publication date : Feb 27, 2018
Length: 320 pages
Edition : 1st
Language : English
ISBN-13 : 9781787128781
Vendor :
Apple
Category :
Languages :
Tools :

What do you get with eBook?

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Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want

Product Details

Publication date : Feb 27, 2018
Length: 320 pages
Edition : 1st
Language : English
ISBN-13 : 9781787128781
Vendor :
Apple
Category :
Languages :
Tools :

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Table of Contents

14 Chapters
Migrating from Swift 3 to Swift 4 Chevron down icon Chevron up icon
FRP Fundamentals, Terminology, and Basic Building Blocks Chevron down icon Chevron up icon
Set up RxSwift and Convert a Basic Login App to its RxSwift Counterpart Chevron down icon Chevron up icon
When to Become Reactive? Chevron down icon Chevron up icon
Filter, Transform, and Simplify Chevron down icon Chevron up icon
Reduce by Combining and Filtering and Common Trade Offs Chevron down icon Chevron up icon
React to UI Events – Start Subscribing Chevron down icon Chevron up icon
RxTest and Custom Rx Extensions – Testing with Rx Chevron down icon Chevron up icon
Testing Your RxCode – Testing Asynchronous Code Chevron down icon Chevron up icon
Schedule Your Tasks, Don't Queue! Chevron down icon Chevron up icon
Subscribe to Errors and Save Your App Chevron down icon Chevron up icon
Functional and Reactive App-Architecture Chevron down icon Chevron up icon
Finish a Real-World Application Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.4
(5 Ratings)
5 star 80%
4 star 0%
3 star 0%
2 star 20%
1 star 0%
mayank Mar 28, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Nicely explained RxSwift concepts. The good thing about this book is the chapter wise distribution of projects and examples. It lays down a nice foundation by explaining the building blocks first and then building apps on top of the concepts. Highly recommended, hope to see an early release for swift 5. Kudos!
Amazon Verified review Amazon
AB Mar 26, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
After trying several online courses and a number of books on Swift programming, this is one of the best, I must say. It explains you step by step the code you write, excellent quality and great timing delivery. The author explains the principles behind, and examples of how to use, the unique and powerful features of Swift. Highly recommended.
Amazon Verified review Amazon
Code Nerd May 01, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Really good book to clear the foundation level hick ups while starting RxSwift. The book gradually builds the concepts from easy to hard and the transition is smooth. Real world examples in later chapters help to get an idea how to convert existing projects in RxSwift. Thumbs Up!!!
Amazon Verified review Amazon
Pijush Debbarma Jan 06, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Good quality of paper and printing. Good for beginners and experienced iOS developers.
Amazon Verified review Amazon
Nick Apr 28, 2018
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
This book does introduce RXSwift concepts, but I didn’t get much more value from it than from the ReactiveX site. The verbiage is often overly complicated and sounds like the author is trying to prove something: “We all know X about Swift”, “it’s obvious that Y is the case”. There are also grammatical errors that get in the way of absorbing the material. Also the book mentions FRP (Functoinal Reactive Programming) and that it will teach us FRP. The RXSwift site explicitly states that RxSwift is not an implementation of FRP and that the acronym is a misnomer.The first chapter is indeed a discussion on Swift 3 -> Swift 4 which has nothing to do with reactive programming. This book does have valuable content in it, but compared to my past experience with Packt books, is not up to par, both the technical content and writing quality.
Amazon Verified review Amazon
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