AdventOfCode/day6/day6part1.exs

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Elixir
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defmodule Day6Part1 do
def run do
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File.stream!("input")
|> Stream.chunk_by(&(&1 == "\n"))
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|> Stream.map(fn group ->
group
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|> Enum.join()
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|> String.to_charlist()
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|> Enum.frequencies()
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|> Map.delete(?\n)
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|> Enum.count()
end)
|> Enum.sum()
|> IO.puts()
end
end
Day6Part1.run()