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

Chapter 12. Building Better Containers - Functional Data Types

In Chapter 12, Implementing Design Patterns - The Functional Way, we have gone over many ways of using functions to achieve different results, and in this chapter, we will go more deeply into data types from a functional point of view. We'll be considering ways of actually implementing our own data types, with several features to help composing operations or ensuring purity, so your FP coding will become actually simpler and shorter. We'll be touching on several themes:

  • Data types from a functional point of view, because even though JavaScript is not a typed language, a better understanding of types and functions are needed
  • Containers, including functors and the mystifying monads, to better 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 as an extra