From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2009-11-27T05:12:16+09:00
Subject: Re: Pattern match to fail if two periods in a row

On Thu, Nov 26, 2009 at 8:51 PM, Ralph Shnelvar <ralphs@dos32.com> wrote:
> Ok ... I really tried.  And I used http://rubular.com/  (really nice)
>
> And I read and reread the pickaxe book section on regular
> expressions.
>
> In other words ... I tried.
>
> So ..
>
> How does one create an expression that fails if there are two or more periods
> (e.g. "..") in a row?

>> "abc..def" !~ /\.\./
=> false

One easy way is to use the negated match operator (!~). Then the
regexp is trivial.

Jesus.