Book Image

Mastering JavaScript Functional Programming - Second Edition

By : Federico Kereki
Book Image

Mastering JavaScript Functional Programming - Second Edition

By: Federico Kereki

Overview of this book

Functional programming is a paradigm for developing software with better performance. It helps you write concise and testable code. To help you take your programming skills to the next level, this comprehensive book will assist you in harnessing the capabilities of functional programming with JavaScript and writing highly maintainable and testable web and server apps using functional JavaScript. This second edition is updated and improved to cover features such as transducers, lenses, prisms and various other concepts to help you write efficient programs. By focusing on functional programming, you’ll not only start to write but also to test pure functions, and reduce side effects. The book also specifically allows you to discover techniques for simplifying code and applying recursion for loopless coding. Gradually, you’ll understand how to achieve immutability, implement design patterns, and work with data types for your application, before going on to learn functional reactive programming to handle complex events in your app. Finally, the book will take you through the design patterns that are relevant to functional programming. By the end of this book, you’ll have developed your JavaScript skills and have gained knowledge of the essential functional programming techniques to program effectively.
Table of Contents (17 chapters)
Technical Requirements

Functional design patterns

After having seen several OOP design patterns, it may seem a cheat to say that there's no approved, official, or even remotely generally accepted similar list of patterns for FP. There are, however, several problems for which there are standard FP solutions, which can be considered design patterns on their own, and we have already covered most of them in this book.

What are candidates for a possible list of patterns? Let's attempt to prepare one—but remember, it's just a personal view. Also, I'll admit that I'm not trying to mimic the usual style of pattern definition; I'll just be mentioning a general problem and refer to the way FP in JS can solve it, and I won't be aiming for nice, short, memorable names for the patterns either:

  • Processing collections using filter/map/reduce: Whenever you have...