Thinking Functionally in Objective-C
Thinking Functionally in Objective-C
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Thinking Functionally in Objective-C

Functional Reactive Programming on iOS
Functional Programming for the Object-Oriented Programmer

About the Bundle

The books in Thinking Functionally take a practical and pragmatic approach to incorporating functional programming into software.

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About the Books

Functional Reactive Programming on iOS

Functional Reactive Programming on iOS

Functional reactive programming introduction using ReactiveCocoa
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1. Functional Philosophy

Before we can talk about Functional Reactive Programming on iOS, we need to deconstruct it into its two fundamental philosophies: functional programming married with reactive programming. 

2. Introducing RXCollections

In order to dip readers feet into the water, we're going to discuss RXCollections' map, filter, and fold functions. By showing the user these functions, we hope to impart them with the notion that we should not be worried about how they work, but rather what they do. 

3. ReactiveCocoa

In this chapter, we'll show how we can apply the same approaches from RXCollections using arrays as sequences. This introduces the concept of a signal and a stream.

4. Gluing it Together

Here's where things get interesting. We're going to guide the user through the process of writing a basic 500px iPhone app using the SDK I wrote for them. The SDK uses a standard Cocoa approach, and with it, we'll show how we can glue together standard Cocoa code into an app built using RAC. This demonstrates how to properly use subjects.

5. MVVM on iOS

This chapter introduces the Model-View-ViewModel paradigm and explains how it's useful on iOS. A front end to the application written in the previous chapter is written in order to show how MVVM works with ReactiveCocoa and increases the testability of iOS apps. While writing the view model, we'll demonstrate how to use commands appropriately. 

Functional Programming for the Object-Oriented Programmer

Functional Programming for the Object-Oriented Programmer

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This book serves three overlapping audiences:

  • People who'd like to learn functional programming because they want to be ready if such languages become part of the mainstream.
  • People who'll be working in an object-oriented language but want to use some functional programming idioms and tricks of the trade in their projects.
  • People with less specific goals, but who believe that learning languages that conceptualize problems and solutions in radically different ways will make them better programmers in general.

The book uses Clojure, a popular functional language that runs on the Java Virtual Machine. It contains many exercises and their solutions.

For more about what the book covers, see the sample PDF. It includes the Introduction, the first chapter, and the glossary.

The book is "feature complete", but there will be bug fixes and improvements to the explanations over the next few months.

Praise

"This book, written by Brian Marick, is important. Indeed, it may be necessary. We need something to bridge the gap between the huge population of OO programmers, and the growing need for functional programmers. I’ve seen nothing else that fills this need so well."

— From a review by Robert "Uncle Bob" Martin

"@marick is blowing my mind with #fp_oo, building OO on top of FP."

Larry Staton Jr.

"I have an understanding of monads for the first time thanks to @marick and his awesome book"

Dave Kincaid

"'Functional Programming for the OO Programmer' by @marick features the best introduction to Clojure I've read so far."

Sebastian Benz

"Bought #fp_oo by @marick today. Chapter 1 is the best #clojure intro I have read"

Adrian Mowat

About the Authors

Ash Furrow
Ash Furrow

Ash Furrow is a Canadian iOS developer and author, currently working at Artsy. He has published five books, built many apps, and is a contributor to the open source community. On his blog, he writes about a range of topics, from interesting programming to explorations of analogue film photography.

Brian Marick
Brian Marick

Brian Marick was first exposed to the functional style in 1983, when the accident of knowing a little bit of Lisp tossed him into the job of technical lead on a project to port Common Lisp to a now-defunct computer architecture. That led him to a reading spree about all things Lisp, the language from which the functional style arguably originated. He’s been a language geek ever since, despite making most of his living as a software process consultant. He’s the author of the popular Midje testing library for Clojure and has written two books (Everyday Scripting with Ruby and Programming Cocoa with Ruby).

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