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First commit of partial RosettaCode contents.

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Pushing this for testing purposes. Lots of work still needed.
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Ingy döt Net 2013-04-08 13:02:41 -07:00
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Task/Entropy/Haskell/entropy.hs Normal file
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import Data.List
main = print $ entropy "1223334444"
entropy s =
sum . map lg' . fq' . map (fromIntegral.length) . group . sort $ s
where lg' c = (c * ) . logBase 2 $ 1.0 / c
fq' c = map (\x -> x / (sum c)) c