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)

Cats effect

The Cats effect is a library for concurrent programming in cats. Its main feature is a bunch of type classes, data types, and concurrency primitives to describe concurrent programming in Scala with cats.

The concurrency primitives support among other things:

  • Resource managementthink try-with-resources.
  • Seamless composition of parallel computations.
  • Communication between parallel computations.

We will start discussing the library by looking at its central concurrency primitive, IO, and some capabilities of Cats that we will need in the process of discussing it.

ProductR

Before diving deep into the library and discussing its features, we need to mention a particular operator that is frequently used throughout...