Re: [xsl] mod position() tests positive all of the time

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Subject: Re: mod position() tests positive all of the time
From: Abel Braaksma <abel.online@xxxxxxxxx>
Date: Sat, 30 Dec 2006 14:57:49 +0100

Hi Allen,

I had some additional thoughts, see below

Abel Braaksma wrote:

Why did you choose to use call-template? Using apply-template and template matches is likely much easier.

<xsl:template name="results"> <table> <xsl:for-each select="insightResponse/searchResponse/collectionResultSet/object/thumbnail[position()

mod 5 = 1]">
What this does highly depends on your input. For instance, if you have a set of "object" nodes, and each has one "thumbnail" node, then this for-each will select all of them (as postion() is always for each first thumbnail node under object). Depending on your input, you may want to write this a little different for readability, but as far as I can tell, this code is not wrong per se.

Because it looks as if you want to output several thumbnails of pictures where you specify the row-size and you use XSLT for the logic, here's is a generalized example of what you can use by using templates (instead of for-each). Note the use of modes, it makes it easier to apply a template multiple times to an input node, without getting into infinite recursion.

Input file:
<input>
   <thumbnail url="http://someurl/bla1.gif" />
   <thumbnail url="http://someurl/bla2.gif" />
   <thumbnail url="http://someurl/bla3.gif" />
   <thumbnail url="http://someurl/bla4.gif" />
   <thumbnail url="http://someurl/bla5.gif" />
   <thumbnail url="http://someurl/bla6.gif" />
   <thumbnail url="http://someurl/bla7.gif" />
   <thumbnail url="http://someurl/bla8.gif" />
   <thumbnail url="http://someurl/bla9.gif" />
   <thumbnail url="http://someurl/bla10.gif" />
   <thumbnail url="http://someurl/bla11.gif" />
   <thumbnail url="http://someurl/bla12.gif" />
   <thumbnail url="http://someurl/bla13.gif" />
   <thumbnail url="http://someurl/bla14.gif" />
</input>

XSLT file:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="xml" encoding="UTF-8" indent="yes"/>

<xsl:template match="/input"> <html><body> <table> <xsl:apply-templates select="thumbnail" /> </table> </body></html> </xsl:template> <xsl:template match="thumbnail[position() mod 5 = 1]"> <xsl:variable name="pos" select="position()" /> <tr> <xsl:apply-templates mode="makethumb" select=". | following-sibling::thumbnail[position() < 5]" /> </tr> </xsl:template> <xsl:template match="thumbnail" mode="makethumb"> <td> <img src="{@url}" /> </td> </xsl:template> </xsl:stylesheet>


Output after transformation:
<html>
  <body>
     <table>
        <tr>
           <td><img src="http://someurl/bla1.gif"/></td>
           <td><img src="http://someurl/bla2.gif"/></td>
           <td><img src="http://someurl/bla3.gif"/></td>
           <td><img src="http://someurl/bla4.gif"/></td>
           <td><img src="http://someurl/bla5.gif"/></td>
        </tr>
        <tr>
           <td><img src="http://someurl/bla6.gif"/></td>*
*            <td><img src="http://someurl/bla7.gif"/></td>
           <td><img src="http://someurl/bla8.gif"/></td>
[.....]
etc.


Cheers,
-- Abel Braaksma
  http://www.nuntia.nl

Current Thread
mod position() tests positive all of the time Allen Jones - 30 Dec 2006 12:05:14 -0000 Abel Braaksma - 30 Dec 2006 13:38:30 -0000 Abel Braaksma - 30 Dec 2006 13:59:09 -0000 <= Tony Graham - 30 Dec 2006 13:42:25 -0000 <Possible follow-ups> cknell - 30 Dec 2006 13:41:10 -0000 Allen Jones - 30 Dec 2006 19:10:54 -0000 Michael Kay - 30 Dec 2006 22:21:29 -0000

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