Am Donnerstag, 10. Februar 2005 16:53 schrieb Peter Simons: > Jan-Willem Maessen writes: > > Is it really clear or obvious what > > > > map . (+) > > > > means? > > Yes, it is perfectly obvious once you write it like this: > > incrEach :: Integer -> [Integer] -> [Integer] > incrEach = map . (+)
Yes, but without the type signature it isn't really (to a beginner, at least). > > Now compare that to the following function, which does the > some thing but without point-free notation: > > incrEach' :: Integer -> [Integer] -> [Integer] > incrEach' i is = is >>= \i' -> return (i'+i) Ugh, but I think the natural way to write it looks more like incrAll :: Integer -> [Integer] -> [Integer] incrAll n ks = map (+n) ks which is no less readable than map . (+). > > Which one is harder to read? ;-) > > Peter > Daniel _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
