Hi, Since Maybe is a monad, I could write code like 'maybeA >> maybeB >> maybeC' to check if all these are not Nothing. Or 'liftM foo maybeD' to avoid ugly 'case of'. But how if here maybe[ABC] are like 'IO (Maybe Int)', or foo is type of 'Int -> IO Int'? -- 竹密岂妨流水过 山高哪阻野云飞
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