From: Victor Deryagin <vderyagin@...>
Date: 2011-12-16T16:07:17+09:00
Subject: Re: regexp detect repeating number

rubix Rubix <aggouni2002@yahoo.fr> writes:

> Hi,
>
> I want to detect a repeating number in a string; something like:
> 252525252525 or 123123123
> regards,


This seems to work:

    regexp = /(\d+?)(?=\1)/

    '252525252525'[regexp]            # => "25"
    '123123123'[regexp]               # => "123"
    '1223122312231223'[regexp]        # => "1223"