gistfile1.ex

defmodule Bitmap do
  defstruct value: 0

end

defimpl Access, for: Bitmap do
  use Bitwise
   def access(%Bitmap{value: value}, bit) do
    if (value &&& (1 <<< bit)) == 0, do: 0, else: 1    
  end
end


fifty = %Bitmap{value: 50}

[5,4,3,2,1,0] |> Enum.each(fn bit -> IO.puts fifty[bit] end)