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Jakub Kozłowski

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All the projects I didn't finish, and why it was worth itScalar Conference 20252025-03-27
A testing library called Flawless experiments with path-dependent types for unique suite identifiers and a recursive, higher-kinded test model explored via…
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PAIN-FREE APIS WITH SMITHY4SScalar Conference 20232023-03-23
Claim: define an API once and generate everything from it. Uses Smithy as the IDL and smithy4s to generate single source of truth specs into readable…
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A Server is Just a Function An Introduction to http4sLambdaConf 20192019-06-05
http4s presents concrete choices: a functional HTTP library for Scala http4s built on cats-effect and fs2 that makes requests, responses and bodies the same…
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CONQUERING CONCURRENCY WITH FUNCTIONAL PROGRAMMINGScalar 20192019-04-05
Argues that purely functional code handles real concurrency by making shared state explicit and composable, using Ref for atomic state in IO, Deferred as a…
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7 sins of a Scala beginnerScala.IO 20172017-11-02
Claims five sins not seven and walks through concrete mistakes: sacrificing readability for conciseness (unnamed tuples, chained maps, missing public type…
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