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%{
  0 => "longitude",
  1 => "latitude",
  2 => "name",
  3 => "description",
  4 => "spinner_friendly",
  5 => "lake",
  6 => "less_than_one_hour",
  7 => "one_to_three_hours",
  8 => "greater_than_three_hours",

noelworden

|> Map.new(fn {val, num} -> {num, val} end)

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[
  {"longitude", 0},
  {"latitude", 1},
  {"name", 2},
  {"description", 3},
  {"spinner_friendly", 4},
  {"lake", 5},
  {"less_than_one_hour", 6},
  {"one_to_three_hours", 7},
  {"greater_than_three_hours", 8},

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|> Enum.with_index()

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[
  "longitude",
  "latitude",
  "name",
  "description",
  "spinner_friendly",
  "lake",
  "less_than_one_hour",
  "one_to_three_hours",
  "greater_than_three_hours",

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|> Enum.fetch!(0)

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|> CSV.parse_stream(skip_headers: false)

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|> File.stream!()

noelworden

def get_column_names(file) do
  file
  |> File.stream!()
  |> CSV.parse_stream(skip_headers: false)
  |> Enum.fetch!(0)
  |> Enum.with_index()
  |> Map.new(fn {val, num} -> {num, val} end)
end

noelworden

alias NimbleCSV.RFC4180, as: CSV