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

Building Better Containers - Functional Data Types

In Chapter 11, Implementing Design Patterns  The Functional Way, we went over how to use functions to achieve different results. In this chapter, we will look at data types from a functional point of view. We'll be considering how we can implement our own data types, along with several features that can help us compose operations or ensure their purity so that our FP coding will become simpler and shorter.

We'll be touching on several themes:

  • Data types from a functional point of view. Even though JavaScript is not a typed language, a better understanding of types and functions is needed.
  • Containers, including functors and the mystifying monads, to structure data flow.
  • Functions as structures, in which we'll see yet another way of using functions to represent data types, with immutability thrown in...