Quoting Christian Maeder
Am 21.01.2011 00:35, schrieb Sean Charles:
wiiClose :: Ptr Word8 -> IO Bool wiiClose wptr = do response <- c_wiimote_close wptr case response of 0 -> return True _ -> return False
This can be rewritten to:
wiiClose = fmap (== 0) . c_wiimote_close
case status of True -> putStrLn "OK" False -> putStrLn "FAIL"
Matching Bool values use "case" is no good style:
putStrLn (if status then "OK" else "FAIL")
Christian
That's clever but you'd have to *know* haskell to *know* you could do that! Point-free (pointless!) is something I have yet to fully tackle, it looks like a great thing. Function composition is something else for my brain to remember exists in the language! IIUC: given a Ptr8 Word, call c_wiimote close then 'functor map' the 'section' (== 0) over the single entry in the list... what list? I am confused again because I cannot see a list, c_wiimote_close answers a pointer. I understand (== 0) rather than (0 ==) though, that's something! Thanks for your time. :)