Re: SUMMARY: Selecting unique value of an attribute

[Dimitre Novatchev <dnovatchev at yahoo dot com>]

You'll speed up the first solution considerably if you use 

<xsl:if test="not(@entry = preceding::index[1]/@entry)">

instead of
<xsl:if test="not(@entry = preceding::index/@entry)">

In the first case you perform a single comparison using the fact that
the template was applied on a set of "index" elements already sorted by
the value of their @entry attribute.

The second test is more general, will work on an unsorted node-list,
but will require an average of count(//index) div 2  comparisons.


Cheers,
Dimitre Novatchev.

Paul Terray <terray@4dconcept.fr> wrote:
>- - One using the comparison with the preceding element in a sorted 
subtree, 
>with a sub-template. This give a solution like this :
>"Robert Stupak" <robert@stinklas.lt>
>   <xsl:template match="text">
>     <xsl:apply-templates select="index">
>         <xsl:sort select="@entry"/>
>     </xsl:apply-templates>
>   </xsl:template>
>
>
>   <xsl:template match="index">
>     <xsl:if test="not(@entry = preceding::index/@entry)">
>       <xsl:value-of select="@entry"/>
>     </xsl:if>
>   </xsl:template>
>
>This solution is clean to read, although I do prefer the other one for

>compacity and probably performance.


__________________________________________________
Do You Yahoo!?
Yahoo! Mail - Free email you can access from anywhere!
http://mail.yahoo.com/


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