2015-11-18 06:14:39 +00:00
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file = hd(System.argv)
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2016-12-05 22:15:40 +01:00
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File.read!(file)
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|> String.upcase
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|> String.graphemes
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|> Enum.filter(fn c -> c =~ ~r/[A-Z]/ end)
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|> Enum.reduce(Map.new, fn c,acc -> Map.update(acc, c, 1, &(&1+1)) end)
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|> Enum.sort_by(fn {_k,v} -> -v end)
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|> Enum.each(fn {k,v} -> IO.puts "#{k} #{v}" end)
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