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About the Book

Practical FP in Scala: A hands-on approach, is a book for intermediate to advanced Scala developers. Aimed at those who understand functional effects, referential transparency and the benefits of functional programming to some extent but who are missing some pieces to put all these concepts together to build a large application in a time-constrained manner.

Throughout the chapters we will design, architect and develop a complete stateful application serving an API via HTTP, accessing a database and dealing with cached data, using the best practices and best functional libraries available in the Cats ecosystem such as Cats Effect, Fs2, Http4s, Skunk, Refined & others.

You will also learn about common design patterns such as managing state, error handling and anti-patterns, all accompanied by clear examples. Furthermore, in the Bonus Chapter, we will dive into some advanced concepts such as MTL and Optics, and will explore Fs2 streams with a few interesting examples.

The book is supplemented by two Scala projects:

  • Shopping Cart application: https://github.com/gvolpe/pfps-shopping-cart
  • Standalone examples: https://github.com/gvolpe/pfps-examples

Looking for a printed version? You can get a Softcover (paperback) here.

Got some feedback? Please email the author here: pfpscala at gmail dot com.


About the Author

Gabriel Volpe’s avatar Gabriel Volpe

@volpegabriel87

Gabriel Volpe is a Software Engineer, specialized in functional programming, from Buenos Aires, Argentina. He writes code since 2005, mainly Scala and a bit of Haskell, though always using Nix to guarantee reproducibility.

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