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 have considered a new way of producing functions, by fixing the arguments to an existing function in several different ways: currying, a theoretical way; partial application, with more flexibility; and partial currying, which combines good aspects from both previous methods. Using these transformations, you can simplify your coding, because you can generate more specialized versions of general functions, without any hassle.

In Chapter 8, Connecting Functions - Pipelining and Composition, we will turn back to some concepts we saw in the chapter on pure functions, and we will be considering ways of ensuring that functions cannot become impure by accident, by seeking for ways to make their arguments immutable, making them impossible to mutate.