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Pure Functional HTTP APIs in Scala

The State of the Art

Learn about the current landscape of Scala backend libraries such as Akka-HTTP, Play, and Slick. Understand why referential transparency is crucial in functional programming and how the use of Scala's Future affects purity, evaluation strategies, and testability in HTTP services.

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The current state of the art

Within the Scala ecosystem, the Akka-HTTP library is a popular choice for implementing server-side backends for HTTP APIs. Another popular option is the Play framework, but using a full-blown web framework to just provide a thin API is an ...