Re: [xsl] Adding numbers in xsl loop

[Antonio Fiol <fiol at w3ping dot com>]

Hi Ard,

I was about to send you an answer similar to that of Jim Fuller when I 
saw his.

Here's what I had in my message that was not in his:


XSL is a FUNCTIONAL language (as opposed to PROCEDURAL). That means, 
among other things, that there is no concept of "before" and "after" 
(there is no time line).

i=i+1 is typically dependent on the time line: the PREVIOUS value of i 
is incremented of 1, and then it is stored (FUTURE value) into i.

That's why....


Antonio Fiol



Ard Schrijvers wrote:


> Thanks a lot. This helps me a lot. I still don't understand, why in xsl simple programming code ( like for loops , not on the xml, but just like i=0 to 10)  is not included. Also like date function, etc. 
> regards ard
>
> -----Oorspronkelijk bericht-----
> Van: James Fuller [mailto:james.fuller@o-idev.com]
> Verzonden: 25 June 2002 11:50
> Aan: xsl-list@lists.mulberrytech.com
> Onderwerp: Re: [xsl] Adding numbers in xsl loop
>
>
>
> ----- Original Message -----
> From: "Ard Schrijvers" <Ard@hippo.nl>
> To: <xsl-list@lists.mulberrytech.com>
> Sent: Tuesday, June 25, 2002 10:27 AM
> Subject: [xsl] Adding numbers in xsl loop
>
>
>  
>
> > Perhaps somebody can help me with the following:
> >
> > I want in an xsl:for-each loop to add a found value to a certain variable.
> >    
> Something like this:
>  
>
> > <xsl:for-each select="projects/project[medewerker[login=$loginMatch]]">
> > <xsl:variable name="currentPro" select="name"/>
> > <xsl:variable name="totaalX"
> >    
> select="sum(../../hours/entry[login=$loginMatch][date/year=$jaarX][date/mont
> h=$maandX][projectname=$currentPro]/duration)"/>
>  
>
> > (now i want something like, so that absTotal get's in the loop everytime
> >    
> the value of totaalX plus the value of itself:)
>  
>
> > <xsl:variable name="absTotal" select="$absTotal + $totaalX"/>
> > </xsl:for-each>
> >
> > Apparently, this does not work in xsl. I can't figure out, how to use a
> >    
> basic programming issue like i = i + 1 in a loop???????????
>
> hehe, another customer !
>
> u cant do x=x+1 loops with XSLT, because once u set a var it cannot change !
>
> u can get around this quite easily by having a named template and call it
> recursively eg.
>
>
> taken straight from cooktop
>
> <!-- Use: include this call with the number of iterations
> This sample will loop from 1 to 10 including 1 and 10
> -->
> <xsl:call-template name="for.loop">
> <xsl:with-param name="i">1</xsl:with-param>
> <xsl:with-param name="count">10</xsl:with-param>
> </xsl:call-template>
> <!-- Rename "old name" elements to "new name" -->
> <xsl:template name="for.loop">
> <xsl:param name="i"/>
> <xsl:param name="count"/>
> <xsl:if test="$i &lt;= $count">
> <!--    body of the loop goes here    -->
> </xsl:if>
> <xsl:if test="$i &lt;= $count">
>  <xsl:call-template name="for.loop">
>
>   <xsl:with-param name="i">
>    <!-- Increment index-->
>    <xsl:value-of select="$i + 1"/>
>   </xsl:with-param>
>   <xsl:with-param name="count">
>    <xsl:value-of select="$count"/>
>   </xsl:with-param>
>  </xsl:call-template>
> </xsl:if>
> </xsl:template>
>
>
> hth, jim fuller
>
>
>
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>
>
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>
> .
>
>  



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