Programming in Haskell -- dependency injection via type classes

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I really struggled last time to be able to replace the concrete implementation of the storage layer with a more abstract type class. Since then I've had a look at it in a more relaxed, non-live-streaming environment and I'm ready to give it another go. In this episode I'll use the type class correctly and create a storage abstraction that will allow me to override it when running test.
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hey great video.

What extensions are you using to make it easier to program?

FernandoLopez-rdjv