Part IV of writing a web app with FP is up https://matsumonkie.fr/post/4
I talk about testing side effects with the readerT design pattern.
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A great article (and series in general)! Having more concrete tutorials on how to build stuff in Haskell is really awesome and this series does it really well.
TIL say, I always created a STM queue and worker and sent output text there, good to know that I can replace that with say 
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Thank you for the kind words!!! It means a lot 
TIL say, I always created a STM queue and worker and sent output text there, good to know that I can replace that with say
Yup, say is yet another tool I can’t live without 
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