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Created January 24, 2021 23:33
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HowToRun.hs
runMyStack :: MaybeT (ReaderT Env IO) a -> Env -> IO (Maybe a)
runMyStack comp env = case runMaybeT comp of
comp' -> runReaderT comp' env
-- Or
runMyStack comp env = runReaderT (runMaybeT comp) env
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