It seems there's an assumption about the range of the parameter function and the range of the entire function. That is, I think we're assuming that the length of the final result is the same as the length of the result of the first function?
If I'm correct in presuming that constraint, then I think this indicates that a "more elegant" solution might involve using the lightweight-dependently-typed vectors approach. Though I can't promise it will actually be nicer! Nick On 12/4/06, Joachim Breitner <[EMAIL PROTECTED]> wrote:
Hi, while pondering over the four fours problem, I wondered: Is there a function of type (a -> [b]) -> [a -> b] It looks a bit like sequence when applied in the ((->) a) Monad: sequence :: [a -> b] -> a -> [b] but I was looking for the other direction. I came up with: \g -> map (\n a -> g a !! n) [1..] which has the desired type and functionality, but it looks rather inelegant and messy. Any better ideas? Thanks, Joachim -- Joachim "nomeata" Breitner mail: [EMAIL PROTECTED] | ICQ# 74513189 | GPG-Key: 4743206C JID: [EMAIL PROTECTED] | http://www.joachim-breitner.de/ Debian Developer: [EMAIL PROTECTED] _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
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