Book Image

Mastering Functional Programming

Book Image

Mastering Functional Programming

Overview of this book

Functional programming is a paradigm specifically designed to deal with the complexity of software development in large projects. It helps developers to keep track of the interdependencies in the code base and changes in its state in runtime. Mastering Functional Programming provides detailed coverage of how to apply the right abstractions to reduce code complexity, so that it is easy to read and understand. Complete with explanations of essential concepts, practical examples, and self-assessment questions, the book begins by covering the basics such as what lambdas are and how to write declarative code with the help of functions. It then moves on to concepts such as pure functions and type classes, the problems they aim to solve, and how to use them in real-world scenarios. You’ll also explore some of the more advanced patterns in the world of functional programming such as monad transformers and Tagless Final. In the concluding chapters, you’ll be introduced to the actor model, which you can implement in modern functional languages, and delve into parallel programming. By the end of the book, you will be able to apply the concepts of functional programming and object-oriented programming (OOP)in order to build robust applications.
Table of Contents (17 chapters)

Summary

In this chapter, we have covered the broad infrastructure that the Typelevel umbrella of libraries provides for purely functional programming. First, we learned the foundation for asynchronous programming with Cats, that is, the Cats effect library. We discussed the IO concurrency primitive and the philosophy of computations as values. After that, we learned the foundations for the server-side programming, which involves a range of libraries. The libraries in question were responsible for HTTP request handling and database access, while utilizing a JSON conversion library under the hood. We have had a birds-eye overview of what programming with these may look like.

By now, we have covered enough of material for us to start writing industrial software in a purely functional way. In the next chapter, we will see more advanced patterns of functional programming. These patterns...