[Haskell-cafe] Re: Functors [Comments from OCaml Hacker Brian Hurt]

[Andrew Coppin]

Heinrich Apfelmus wrote:
> Andrew Coppin wrote:
>   
>>> instance (Monad m) => Functor m where
>>>   fmap f ma = do a <- ma; return (f a)
>>>   
>>>       
>> While that's quite interesting from a mathematical point of view, how is
>> this "useful" for programming purposes?
>>     
>
> Surely, you agree that  liftM  is "useful"? Because that's the same thing.
>   

Then why not just use liftM? (That way, you know what it does...)