From: Tobias Reif <tobiasreif@...>
Date: 2002-03-18T02:54:25+09:00
Subject: Re: XPath

Michael Schuerig wrote:


> Still another question: Is it necessary (with the current REXML) to 
> iterate over the OLD_TREE explicitly in Ruby? 


AFAICS: currently, yes. But XPath support in REXML will grow to be more complete.
(also see my other post)


> My original idea was to 
> build an XPath expression that does this implicitly.


Sure; that's why I said my program is quirky, and why I said that this 
is partly due to REXML's XPath support still evolving.


> XPath.first(OLD_TREE,"//entry[title=\"#{title}\" and year=\"#{year}\"]")


Yep.
In XSLT the apos in the title string has to be quirkily replaced to look 
like this:

/biblio/entry[
   title=concat('Programming Ruby. The Pragmatic 
Programmer',&quot;'&quot;,'s Guide')
   and
   year='2000'
]/author

. But AFAICS this should not be needed in REXML.


> When I played around with this (before I posted here) I always got 
> error messages. Have to try again.

You can also post/send bug reports.

Tobi

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