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

A bit of theory

The concepts that we are going to discuss in this chapter are in some ways very similar, and in other ways quite different. It's common to find some confusion as to their real meanings and there are plenty of web pages that misuse terms. You could even say that all the transformations in this chapter are roughly equivalent since they let you transform a function into another one that fixes some parameters, leaving others free and eventually leading to the same result. Okay, I agree, this isn't very clear! So, let's start by clearing the air, and providing some short definitions, which we will expand on later. (If you feel that your eyes are glazing over, please just skip this section and come back to it later!) Yes, you may find the following descriptions a bit perplexing, but bear with us—we'll go into more detail in just a bit:

  • Currying...