Re: [xsl] sorting and selecting the last value

[Ming Yu <myu@xxxxxxxx>]

Thanks a lot. It works just fine.

Ming

At 10:55 PM 8/8/2002 +0200, you wrote:
> Hello Ming,
>
> there is a difference between
>
> <xsl:variable name="foo" select="bar"/>
>
> and
>
> <xsl:variable name="foo">
>   <xsl:value-of select="bar"/>
> </xsl:variable>
>
> The first variable stores a node set, the second one a Result Tree 
> Fragment (RTF). You have The same problem with your variable declaration. 
> You can use an extension function to convert a RTF to a node set.
>
> If you really only want to have the last node, you can do
>
> <xsl:variable name="last-field-value">
>   <xsl:for-each select="$full_path[contains($dbs_searched, @db)]/*">
>     <xsl:sort select="."/>
>     <xsl:if test="position()=last()">
>       <xsl:copy-of select="."/>
>     </xsl:if>
>   </xsl:for-each>
> </xsl:variable>
>
> You create a RTF too, but can access the value through <xsl:value-of 
> select="$last-field-value"/> and copy the node to the output via 
> <xsl:copy-of select="$last-field-value"/>. You can't do node set functions 
> on a RTF.
>
> What are you trying with <xsl:for-each 
> select="self::node()[not(.=following::node())]">??
>
> If you sort them and you want to have the last one, you don't need that. 
> If you want to have unique nodes, you can do <xsl:if test="not(. = 
> following-sibling::*)"> to reach the same.
>
> If you really need the current content of $field-value as you have it, 
> only as node set, you should think about rearranging your code to use a 
> "correct" grouping method (preceding/following-sibling axis or Muenchian 
> Method). Don't do two things (sorting + grouping) in one step.
>
> Regards,
>
> Joerg
>
> Ming wrote:
> > Hi,
> > I'm trying the access the last value of a sorted list but for some how,
> > the system produces the error:   Can not convert #RTREEFRAG to a
> > NodeList.
> > Here is my codes:
> >     <xsl:variable name='field_value'>
> >         <xsl:for-each select="$full_path[contains($dbs_searched,
> > @db)]/*">
> >                 <xsl:sort select="."/>
> >                 <xsl:for-each
> > select="self::node()[not(.=following::node())]">
> >                         <xsl:copy-of select="."/>
> >                 </xsl:for-each>
> >         </xsl:for-each>
> >     </xsl:variable>
> > <xsl:variable name="lastval" select="$field_value[last()]" />
> > And the error poinrts to the last line: <xsl:variable name="lastval"
> > select="$field_value[last()]" />
> > But if I do <xsl:variable name='field_value'
> > select='$full_path[contains($dbs_searched, @db)]'/>  everything works
> > just fine.
> > Do you have some idea on what could cause the problem?
> > Thanks for your help.
> > Ming
>
>
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