Monad Stacks or: How I Learned to Stop Worrying and Love the Free Monad
summary
Shows techniques for cleaning up nested Scala code (lots of maps, flatMaps and pattern matching) by using Monad Transformers, effects libraries, and Free monads. Demonstrates how these approaches can turn “spaghetti” functional code into clearer code that reads almost like imperative style, with examples grounded in the Scala/Typelevel ecosystem (cats, Play, Akka).
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chapters (6)
- 0:00Monad stacks intro
- 7:04Digital wallets example
- 15:26Transformations and interpreters
- 21:09Production benefits
- 25:04Testing and maintenance
- 27:15Q&A
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