On 9/5/06, hanged(_dot_)man(_at_)lycos(_dot_)com
<hanged(_dot_)man(_at_)lycos(_dot_)com> wrote:
SECOND EXAMPLE:
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="1.0">
<xsl:template name="total-sales-value">
<xsl:param name="list"/>
<xsl:choose>
<xsl:when test="$list">
<xsl:variable name="first" select="$list[1]"/>
<xsl:variable name="total-of-rest">
<xsl:call-template name="total-sales-value">
<xsl:with-param name="list" select="$list[position()!=1]"/>
</xsl:call-template>
</xsl:variable>
<xsl:value-of select="$first/sales * $first/price +
$total-of-rest"/>
</xsl:when>
<xsl:otherwise>0</xsl:otherwise>
</xsl:choose>
</xsl:template>
QUESTION:
In Mr. Kay's example, why does the variable $total-of-rest indeed contain
the total
and not just the result of the addition in the last recursion?
It's as the recursion unravels - it essentially adds it from last item
to the first. It's a great example of a mind-bending recursive
programming :)
cheers
andrew
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