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Re: Having Trouble With Condition For Default Nodeset

Subject: Re: Having Trouble With Condition For Default Nodeset Selection
From: Duncan Anker <danker@xxxxxxxxxxxxx>
Date: Wed, 05 Jul 2006 10:49:25 +1000
us currency troubles
Hi Ken,

Thanks for the nerf mallet. Your suggested solution seems to do the trick quite nicely.

On the use of "//", the $currency-data comes from a select="document(..)" and so seems to be required or I get no result set - although I can probably fold the currency-data and codes into a single select. Better pass me that mallet again. :)


G. Ken Holman wrote:
In your case, using the not() in the predicate will be true for those members that are not the value of the country code, therefore it will be true for many members. So, you need a predicate that will only be true when the member is not found.

I think I would use something along the lines of:

<!--are you sure you need "//" in the following?-->
<xsl:variable name="codes"
<xsl:variable name="found-code"
              select="$codes[@code = $country-code]"/>
<xsl:variable name="currency"
              select="$found-code |
                      $codes[@code='US'][not( $found-code )]"/>

I hope this helps.

. . . . . . . . . Ken

At 2006-07-05 09:57 +1000, Duncan Anker wrote:
I am trying to look up a country code in a list of supported currencies, with a default to US if it is not found. I am using the XSLT 1.0 idiom of

nodeset1[condition] | nodeset2[not(condition)]

for a mutually exclusive result, however for the life of me I can't seem to find a suitable condition - I probably just need a figurative whack on the side of the head to help me "think different" (or should that be "differently?"). I have tried several different variations of the following with no luck, though I am probably just overlooking something really obvious:

<xsl:variable name="currency" select="$currency-data//currency[@code=$country-code and @code != 'US'] | $currency-data//currency[not(@code=$country-code and @code != 'US')]" />

Nothing seems to work no matter how I arrange that - the US currency is always unioned into the set. I'm sure that's the wrong condition to use, and there is something relatively simple I can add, but I'm just not seeing it.

Does anyone have any suggestions, or perhaps a nerf mallet?
Duncan Anker
Server 101, Web Hosting & E-Commerce

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