Book Image

Hands-On Functional Programming with TypeScript

By : Remo H. Jansen
Book Image

Hands-On Functional Programming with TypeScript

By: Remo H. Jansen

Overview of this book

Functional programming is a powerful programming paradigm that can help you to write better code. However, learning functional programming can be complicated, and the existing literature is often too complex for beginners. This book is an approachable introduction to functional programming and reactive programming with TypeScript for readers without previous experience in functional programming with JavaScript, TypeScript , or any other programming language. The book will help you understand the pros, cons, and core principles of functional programming in TypeScript. It will explain higher order functions, referential transparency, functional composition, and monads with the help of effective code examples. Using TypeScript as a functional programming language, you’ll also be able to brush up on your knowledge of applying functional programming techniques, including currying, laziness, and immutability, to real-world scenarios. By the end of this book, you will be confident when it comes to using core functional and reactive programming techniques to help you build effective applications with TypeScript.
Table of Contents (14 chapters)
5
The Runtime – Closures and Prototypes

Immutability, Optics, and Laziness

In the preceding chapters, we learned the most fundamental functional programming techniques and patterns, including some of the most commonly known algebraic data types.

In this chapter, we are going to learn about a number of additional functional programming techniques and patterns, including the following:

  • Immutability
  • Optics
  • Lenses
  • Prims
  • Lazy evaluation

Once more, we will try to build everything from scratch, trying to avoid the use of third-party libraries. Our goal is to take a look at the internal implementation of some of these techniques and patterns so we can fully understand how they work. Let's get started!