Eixir Binary

binary.ex

defmodule Binary do
  def write(text, filename) do
    binary = :erlang.term_to_binary(text)
    File.write(filename, binary)
  end

  def read(filename) do
    case File.read(filename) do
      {:ok, binary} -> :erlang.binary_to_term(binary)
      {:error, _reason} -> "The file does not exist."
    end
  end
end

# Binary.write("Hello, world!", "binaryfile")
# Binary.read("binaryfile")
# => "Hello, world!"