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BookGin/histogram.hs Secret

Created May 8, 2018 04:55
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histogram
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histogram.hs
histogram a = concat (map (++"\n") ([concat [if c!!j >= i then "*" else " " | j <- [0..9]] | i <- reverse [1..maximum c]] ++ ["==========", "0123456789"]))
where c = [length (filter (==i) a) | i <- [0..9]]
-- putStrLn d
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