From: Chad Perrin <code@...>
Date: 2011-07-16T00:32:14+09:00
Subject: Re: replace string between xml tags that contains special characters

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On Fri, Jul 15, 2011 at 07:41:17PM +0900, Rousan Malik wrote:
> I am trying to get rid of the string in a xml file which contains some
> special characters. I want it to be transformed from the following:
>=20
> <message value=3D"teststr: %F0wt^=CF=B6b%99%90%94%D4N%8D%FA%8A%EE%81_
> =DE=A2g%9B@I%E3%F6%FCp%AFX%BD%80%91%B5pEK%C9!j%D3%F3S=7FY%C3%F6B~%C8%FC
> ^%87%C4%F2]! %B9%DF=3D%E7Y%B9element:
> %F0wt^=CF=B6b%99%90%94%D4N%8D%FA%8A%EE%81_
> =DE=A2g%9B@I%E3%F6%FCp%AFX%BD%80%91%B5pEK%C9!j%D3%F3S=7FY%C3%F6B~%C8%FC
> ^%87%C4%F2]! %B9%DF=3D%E7Y%B9"</message>
>=20
> to
>=20
> <message value=3D"Validating element:"</message>
>=20
> I tried using gsub() with regex but so far haven't been successful.

It seems to me you should make use of the non-greedy modifier, which is
?, for .* to indicate you want to match any characters up to a particular
matching string in this case.  Why don't you share what you have for an
attempt at a useful regex, then we can offer modifications to yours
rather than just providing a complete solution from scratch?

This page offers some information about special characters in regexen:

    http://www.zenspider.com/Languages/Ruby/QuickRef.html#12

The non-greedy modifier can be found easily by doing a text search on
that page for "non-greedy".

--=20
Chad Perrin [ original content licensed OWL: http://owl.apotheon.org ]

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