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0 pointsflohofwoe1y ago0 comments

How do you talk to typical OS-, IO- or GUI-APIs (which all essentially represent global mutable state) in Haskell with pure functional code?

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2 comments · 2 top-level

IsTom1y ago

A toy mental model could be e.g. a function that takes OS/IO/GUI events and produces actions (which are then executed by the caller) and then iterate it as long as the program runs. This function in itself can be pure.

louthy1y ago

via the IO monad.

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