Re: [xsl] accumulate a variable...is it possible?

[Gregory Murphy <Gregory.Murphy@xxxxxxxxxxx>]

On Wed, 9 Oct 2002, Carter, Will wrote:

> I am trying to accumulate a variable but not succesful... here is my xml:
> --------------------------------
> <numbers>
>   <num>3</num>
>   <num>7</num>
>   <num>11</num>
>   <num>6</num>
>   <num>3</num>
> </numbers>
> --------------------------------
> 
> here is the output I want:
> --------------------------------
> num=3 accumulated=3 
> num=7 accumulated=10 
> num=11 accumulated=21 
> num=6 accumulated=27 
> num=3 accumulated=30
> --------------------------------


Try this - but watch out for the quadratic run-time!

// Gregory Murphy



<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.0">
<xsl:template match="/">
  <table border="1">
    <xsl:apply-templates select="numbers/num"/>
  </table>
</xsl:template>

<xsl:template match="num">
  <tr>
    <td>num=<xsl:value-of select="."/></td>
    <td>
      <xsl:text>accumulated=</xsl:text>
      <xsl:apply-templates select="." mode="accumulate"/>
    </td>
  </tr>
</xsl:template>

<xsl:template match="num" mode="accumulate">
  <xsl:choose>
    <xsl:when test="preceding-sibling::num">
      <xsl:variable name="previous">
        <xsl:apply-templates select="preceding-sibling::num[1]"
                             mode="accumulate"/>
      </xsl:variable>
      <xsl:value-of select="number(.) + $previous"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="."/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

</xsl:stylesheet>


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