camelize.ex

  def camelize(""),
    do: ""

  def camelize(<<?_, t :: binary>>),
    do: camelize(t)

  def camelize(<<h, t :: binary>>),
    do: <<to_upper_char(h)>> <> do_camelize(t)

  defp do_camelize(<<?_, ?_, t :: binary>>),
    do: do_camelize(<< ?_, t :: binary >>)

  defp do_camelize(<<?_, h, t :: binary>>) when h in ?a..?z,
    do: <<to_upper_char(h)>> <> do_camelize(t)

  defp do_camelize(<<?_>>),
    do: <<>>

  defp do_camelize(<<?/, t :: binary>>),
    do: <<?.>> <> camelize(t)

  defp do_camelize(<<h, t :: binary>>),
    do: <<h>> <> do_camelize(t)

  defp do_camelize(<<>>),
    do: <<>>