piping.ex

defmodule Testing do
  """
  You can pipe straight into a case
  Kernel.<<>>, the special form for binary pattern
  matching can be used in a case match to 
  split up incoming binaries, like this 
  imaginary |~ delimited protocol.
   
    "fiexd_size_header|~some message"
    
  You can also pipe into an anonymous function
  using |> ().() 
  Kernel.& begins the capture and &1 captures
  the piped arg
  """
  def pipes(input) do
    input
    |> case do
      <<_header::binary-size(17), "|~", rest::binary>> ->
        rest

      _ ->
        raise "Invalid"
    end
    |> (&{:ok, &1}).()
  end
end

"""
iex > Testing.pipes("fiexd_size_header|~some message")
{:ok, "some message"}
"""