Book Image

Mastering JavaScript Functional Programming

By : Federico Kereki
Book Image

Mastering JavaScript Functional Programming

By: Federico Kereki

Overview of this book

Functional programming is a programming paradigm for developing software using functions. Learning to use functional programming is a good way to write more concise code, with greater concurrency and performance. The JavaScript language is particularly suited to functional programming. This book provides comprehensive coverage of the major topics in functional programming with JavaScript to produce shorter, clearer, and testable programs. You’ll delve into functional programming; including writing and testing pure functions, reducing side-effects, and other features to make your applications functional in nature. Specifically, we’ll explore techniques to simplify coding, apply recursion for loopless coding, learn ways to achieve immutability, implement design patterns, and work with data types. By the end of this book, you’ll have developed the JavaScript skills you need to program functional applications with confidence.
Table of Contents (22 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback
Connecting Functions - Pipelining and Composition
Answers to Questions


In this chapter, we've seen a common, simple problem, based on a real-life situation, and after analyzing several usual ways of solving that, we went for a functional thinking solution. We saw how to apply FP to our problem, and we also found a more general higher-order way that we could apply to similar problems, with no further code changes. We saw how to write unit tests for our code, to round out the development job. Finally, we even produced an even better solution (from the point of view of the user experience) and saw how to code it and how to unit test it.

In the next chapter 3, Starting Out with Functions - A Core Concept, we'll be delving more deeply into functions, which are at the core of all FP.