Re: redundancy in string(number(current())) = 'NaN' ??

Play the video

Subject: Re: redundancy in string(number(current())) = 'NaN' ??
From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>
Date: Wed, 11 Jun 2003 16:45:54 -0400

At 2003-06-11 16:38 -0400, Robert P. J. Day wrote:

//sales[string(number(current()))='NaN']

just to make sure, i'm assuming the "current()" part is
redundant, since number() will use the string-value of the
context node if there is no argument.  do i understand
that correctly?

No, I'm afraid you don't. The current() function returns the node that was the current node at the beginning of the XPath evaluation ... which could be anywhere given this example XPath expression is starting at the root.

It is *very* useful at times when the current node is the middle of the expression isn't what you need, and would be returned if you just used ".". In the above example "." is a <sales> element. The current node at the start of the expression is most likely not a <sales> element in the above example (though of course it might be).

if so, i assume that that was just put in for aesthetics.

Not at all ... current() is an XSLT function and there is no way in XPath to make reference to that node that was current at the beginning of expression evaluation.

I hope this helps.

............ Ken


--
Upcoming hands-on courses: (registration still open!)
-      (XSLT/XPath and/or XSL-FO) North America: June 16-20, 2003

G. Ken Holman                mailto:gkholman@xxxxxxxxxxxxxxxxxxxx
Crane Softwrights Ltd.         http://www.CraneSoftwrights.com/s/
Box 266, Kars, Ontario CANADA K0A-2E0   +1(613)489-0999 (F:-0995)
ISBN 0-13-065196-6                      Definitive XSLT and XPath
ISBN 0-13-140374-5                              Definitive XSL-FO
ISBN 1-894049-08-X  Practical Transformation Using XSLT and XPath
ISBN 1-894049-11-X              Practical Formatting Using XSL-FO
Member of the XML Guild of Practitioners:    http://XMLGuild.info
Male Breast Cancer Awareness http://www.CraneSoftwrights.com/s/bc

XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list

Current Thread
redundancy in string(number(current())) = 'NaN' ?? Robert P. J. Day - Wed, 11 Jun 2003 16:38:50 -0400 (EDT) G. Ken Holman - Wed, 11 Jun 2003 16:46:34 -0400 (EDT) <= Robert P. J. Day - Wed, 11 Jun 2003 17:01:13 -0400 (EDT) Ritu - Wed, 11 Jun 2003 17:06:00 -0400 (EDT) David Carlisle - Wed, 11 Jun 2003 17:05:46 -0400 (EDT) Robert P. J. Day - Wed, 11 Jun 2003 17:45:12 -0400 (EDT)

<- Previous	Index	Next ->
redundancy in string(number(c, Robert P. J. Day	Thread	Re: redundancy in string(numb, Robert P. J. Day
redundancy in string(number(c, Robert P. J. Day	Date	Re: Processing a <br> in XSL-, J.Pietschmann
	Month

PURCHASE STYLUS STUDIO ONLINE TODAY!

Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Subscribe in XML format

RSS 2.0
Atom 0.3

XML Editor - Download a 15 Day Free Trial Now >

See What's New in Stylus Studio >

Buy Stylus Studio - XML Editor - Now >