[Haskell-beginners] fmap fmap

[Tony Morris]

Michael P Mossey wrote:
> How does one write
>
> fmap (fmap (*2)) xs
>
> without parenthesis? (Using . and $ instead.)
>
> I don't really understand . and $ well enough I guess. I tried a bunch
> of stuff but nothing worked.
>
> -Mike
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fmap . fmap $ (*2)

or perhaps:

(fmap . fmap) (*2)

-- 
Tony Morris
http://tmorris.net/