Re: Re[2]: Proposal: Add concatMapM function (#2042)

On 2008-01-31, Bulat Ziganshin wrote: [A bunch of quite sound advice]

in FP language, the best way to provide encoding is to define it as pair of functions:

data Encoding = Encoding { encode :: String -> String , decode :: String -> String }

Except these types are lies.

data Encoding = Encoding { encode :: String -> Maybe [Word8] , decode :: [Word8] -> Maybe String }

-- Aaron Denney -><-