Cum poate fi definit sequence ?
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sequence_ transforma o lista de actiuni de IO () (sau alte actiuni monadice) intr-o singura actiune compusa. Ati putea face in C asa ceva ? Adica ati putea face in C o functie care transforma o lista de instructiuni intr-un bloc ?
1) In do-notatie, in mod recursiv, sequence_ ar putea fi definit ca:
sequence_ :: [ IO() ] -> IO ()
sequence_ [] = return ()
sequence_ (a:as) = do a
sequence_ as
2) Vazut ca un foldr ar putea fi definit ca:
sequence_ = foldr (>>) (return () )
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