Function to add to Data.List

[Andreas Abel]

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+1

On 05.04.2014 23:53, John Wiegley wrote:
> I heard a talk that mentioned this transform today at Hac NYC, and
> was surprised it wasn't already in Data.List:
> 
> -- | Sort a list using a key on each element.  This implements the 
> --   decorate-sort-undecorate paradigm, also called a Schwarzian
> transform. sortByKey :: Ord b => (a -> b) -> [a] -> [a] sortByKey f
> = map snd . sortBy (comparing fst) . map (\x -> (f x, x))
> 
> I would like to propose adding it.
> 
> John _______________________________________________ Libraries
> mailing list Libraries at haskell.org 
> http://www.haskell.org/mailman/listinfo/libraries
> 


- -- 
Andreas Abel  <><      Du bist der geliebte Mensch.

Department of Computer Science and Engineering
Chalmers and Gothenburg University, Sweden

andreas.abel at gu.se
http://www2.tcs.ifi.lmu.de/~abel/
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