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


In this chapter, we looked at two different approaches (used by commonly available immutability libraries) to avoiding side effects by working with immutable objects and data structures: one based on using JavaScript's object freezing plus some special logic for cloning, and the other based on applying the concept of persistent data structures with methods that allow all kinds of updates without changing the original or requiring full cloning.

In Chapter 11, Implementing Design Patterns – The Functional Way, we will focus on a question that's often asked by object-oriented programmers: how are design patterns used in FP? Are they required, available, or usable? Are they still practiced but with a new focus on functions rather than on objects? We'll answer these questions with several examples, showing where and how they are equivalent...