Dynamic way to access an element's attributes in Elixir

dynamic_access.ex

 defp find_in_combinations(combinations, element) do
    Enum.reduce(combinations, [], fn(c, acc) ->
      # A dynamic way to access c.element (Eg. c.engine)
      if Map.get(c, element) do
        acc ++ [Map.get(c, element)]
      else
        acc
      end
    end)
  end