Re: Multiple elements condition

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Subject: Re: Multiple elements condition
From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>
Date: Fri, 31 Aug 2007 14:37:25 -0400

Hi,

At 05:56 AM 8/31/2007, David replied to Andrew:

> I think there might be a rule here of "code the obvious"
yes actually I need the construct quite often in the day  job and what
we seem to have mostly is
foo[2] and not(foo[3])
which I think is reasonably clear and likely to be as efficient as
anything.

I agree this is preferable if only for reasons of clarity, and am glad to hear no one complain that it is unacceptably inefficient. :->

In XSLT 2.0 I'm starting to use exists(foo[2]) just since in my experience so many beginners just stumble over the nodeset-as-boolean test for existence. (And so many maintenance programmers are beginners! Tell me why that is.) So I might just excuse myself for "exists(foo[2]) and not(foo[3])", even though a beginner would probably guess what it does correctly and be wrong about why.

Of Abel's menagerie of equivalents -- all I can say is to agree with how remarkable the range of alternatives is. (As for the brain-teaser -- when would it ever select anything?)

Cheers,
Wendell

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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
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Current Thread
Re: Multiple elements condition, (continued) Florent Georges - 31 Aug 2007 09:12:03 -0000 Michael Kay - 31 Aug 2007 15:03:25 -0000 Andrew Welch - 31 Aug 2007 09:52:52 -0000 David Carlisle - 31 Aug 2007 09:56:34 -0000 Wendell Piez - 31 Aug 2007 18:52:13 -0000 <= Message not available Abel Braaksma - 30 Aug 2007 22:44:19 -0000

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