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You will learn how to cut your applications into isolated, independent pieces using Freestyle library with free monads or tagless final style. The session is based on a multiplayer, purely functional version of Prisoner’s Dillema.
Your applications frequently consist of business logic, communication, persistence, caches & logging. You always want to keep them apart and reason about each of them individually. However, this is very difficult to achieve in practice.
Enter free monad. It lets you decouple those concerns by dividing our program into algebras and interpreters. During this talk, you will discover an application built on top of free monad in Scala & Cats. You will learn how to create pure & declarative DSLs, side-effecting interpreters and how to use them together. Then you will explore Freestyle library and show how it makes the code more concise. At the end, you will compare the free monad approach to another technique used to decouple concerns: tagless final.
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Polyglot software engineer specialised in developing distributed applications. Functional programming enthusiast. Loves the human component in software projects. Drinks a lot of tea. Has a blog at michalplachta.com. He currently works as team leader at Ocado Technology, where he is building actor-based software for automated warehouses.