On 1 Feb 2013, at 2:53 AM, Robert Klemme <shortcutter / googlemail.com> =
wrote:
>=20
> Look into the regexp engines implementation.  You won't easily see how
> the regexp engine works internally by only using it.  Better yet, get
> a copy of "Mastering Regular Expressions" and digest it.

This is very solid advice.  It's one of the references that you will use =
for years beyond Ruby.

-a.=