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 turned a bit closer to theory and seeing how to use and implement data types from a functional point of view. We started with ways of defining function signatures, to help understand the transformations implied by the multiple operations we later met; then, we went on to define several containers, including functors and monads, and see how they could be used to enhance function composition, and finally we saw how functions could be directly used by themselves, with no extra baggage, to implement functional data structures.

As of now, in this book we have seen several features of functional programming for JavaScript. We started out with some definitions, a practical example, and then moved on to important considerations such as pure functions, side effects avoidance, immutability, testability, building new functions out of other ones, and implementing data flow based upon function connections and data containers. We have seen a lot of concepts, but I'm confident...