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

Thinking Functionally - A First Example

In Chapter 1, Becoming Functional – Several Questions, we went over what FP is, mentioned some advantages of applying it, and listed some tools we'd be needing in JavaScript, but let's now leave theory behind, and start by considering a simple problem and how to solve it in a functional way.

In this chapter, we will do the following:

  • Look at a simple, common, e-commerce related problem
  • Consider several usual ways to solve it, with their associated defects
  • Find a way to solve the problem by looking at it functionally
  • Devise a higher-order solution that can be applied to other problems
  • Work out how to carry out unit testing for functional solutions

In future chapters, we'll be coming back to some of the topics listed here, so we won't be going into too much detail. We'll just show how FP can...