Reduce list of lists to a map where keys come from the first element (like csv file)

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NimbleCSV is good for that.

  alias NimbleCSV.RFC4180, as: CSV

    File.read!("data/myfile.csv")
    |> CSV.parse_string()
    |> Enum.map(fn [a, b, c] -> %{a: a, b: b, c: c} end)
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