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Re: If/then/else confusion
Subject: Re: If/then/else confusion
From: Mark Wilson <mark@xxxxxxxxxxxx>
Date: Tue, 25 Dec 2012 20:20:21 -0700
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I finally got it working with:
<xsl:sort select="if( Prefix!='A' and not(contains(CatalogName, 'SG')))
then Prefix else ''"/>
<Prefix> is ignored for all 'SG' catalogs and for Prefix = 'A' or no
<Prefix> for the other catalogs.
Thanks again for your help on a holiday,
Best of the new Year,
Mark
On 12/25/2012 2:48 PM, Mark Wilson wrote:
Hello Liam, Ken, and Syd:
Thanks so much for your input - I was looking at the thing all wrong
-- 20 years of C++ coding really prejudices one's view of
if-then-else. Once explained, it makes perfect sense.
Thank you all for you help.
I don't celebrate Christmas, but do wish those of you who do a most
merry holiday.
Regards,
Mark
On 12/25/2012 1:43 PM, Liam R E Quin wrote:
On Tue, 2012-12-25 at 13:14 -0700, Mark Wilson wrote:
Thanks for the info Syd.
I am using XSLT2, which I should have said in the original posting.
Mark, the difference between
if (Prefix != 'A') then 1 else 2
and
if (Prefix = 'A') then 2 else 1
is the case where there's no prefix element, as in the last case in your
set of examples.
$A != $B, for two nodelists, means,
there's some pair of elements a and b for which the value
of a is not equal to the value of b
So if $A is empty, there is no such value, and it's false.
$A = $B means there's some pair of values a and b whose values are equal
one with another. So if $A is empty, $A = $B is false.
not($A != $B) is true when $A is the empty sequence.
$A = $B is false when $A is the empty sequence.
Decide which you want and code accordingly :-)
Liam
--
Mark Wilson
Knihtisk Publishing
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