[Haskell-cafe] Re: Very crazy
andrewcoppin at btinternet.com
Tue Sep 25 06:05:52 EDT 2007
Aaron Denney wrote:
> On 2007-09-25, Andrew Coppin <andrewcoppin at btinternet.com> wrote:
>> BTW, one *extremely* common function that I've never seen mentioned
>> anywhere is this one:
>> map2 :: (a -> b) -> [[a]] -> [[b]]
>> map2 f = map (map f)
> Because someone would have to think of a name for it, when (map . map)
> is likely to be clearer.
OK, *now* I'm puzzled... Why does map . map type-check?
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