This operator is usually named .: or the like. It is a weaker form of
fmap.fmap.
I'm pretty strongly -1 on including it in base under the <.> name.
I'm less strongly -1 on some .: variant.
-Edward
On Sat, Sep 19, 2015 at 9:30 PM, Ömer Sinan Ağacan
I don't know if "I find this very useful" is enough for adding a function to base, but here it goes:
infixl 4 <.> (<.>) :: Functor f => (b -> c) -> (a -> f b) -> (a -> f c) f1 <.> f2 = fmap f1 . f2 {-# INLINE (<.>) #-}
I first defined this couple of months ago and I find myself looking for this function all the time now.
One problem with this is that the name is used by widely used `filepath` library. _______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries