binary_version2.exs

defmodule Binary do
  def strip_vowels(a,b \\ "")
  def strip_vowels("", acc), do: acc
  def strip_vowels(<<"a", rest::binary>>, acc), do: strip_vowels(rest, acc)
  def strip_vowels(<<"e", rest::binary>>, acc), do: strip_vowels(rest, acc)
  def strip_vowels(<<"i", rest::binary>>, acc), do: strip_vowels(rest, acc)
  def strip_vowels(<<"o", rest::binary>>, acc), do: strip_vowels(rest, acc)
  def strip_vowels(<<"u", rest::binary>>, acc), do: strip_vowels(rest, acc)
  def strip_vowels(<<head::binary-size(1), rest::binary>>, acc), do: strip_vowels(rest, acc <> head)
end