Subject: RE: tail recursion and NaN
From: "Ragulf Pickaxe" <jawxml@xxxxxxxxxxx>
Date: Sat, 08 May 2004 08:56:01 +0000
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Hi Susan,
If the operation is a simple sum, why not use the inherent XSLT function sum
and let the XPath pick out the right nodes for you?
BTW a number(.) also returns 'NaN' if the node's string value is nothing
(""), so some of the tests you do are not necessary anyway (MK's XSLT
Programmers Ref. 2nd. ed., p. 532).
I would expect something like this to work:
result = <xsl:value-of
select="sum(nodeset-containing-prices[number(translate(.,'$',''))!='NaN'])"/>
where nodeset-containing-prices should be exchanged with the nodeset you use
in the $price parameter first time the template total_value is called.
I hope this helps
Regards,
Ragulf Pickaxe :)
From: "Susan Campbell" <SCampbell@xxxxxxxxxxxxxx>
Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: tail recursion and NaN
Date: Fri, 7 May 2004 08:59:19 -0400
Thanks for the help. I later learned I also had to test for a dollar sign
as well as empty cells. This is what I'm using. It works, but there may
be a more compact/elegant way to do it.
sc
<xsl:template name="total-value">
<xsl:param name="price"/>
<xsl:param name="result" select="0"/>
<xsl:param name="nodollarsign" select="translate($price,'$','')"/>
<xsl:choose>
<xsl:when test="$price and number($price) = number($price)">
<xsl:call-template name="total-value">
<xsl:with-param name="price" select="$price[position() > 1]"/>
<xsl:with-param name="result" select="$result + $price"/>
</xsl:call-template>
</xsl:when>
<xsl:when test="$nodollarsign">
<xsl:call-template name="total-value">
<xsl:with-param name="price" select="$price[position() > 1]"/>
<xsl:with-param name="result" select="$result + $nodollarsign"/>
</xsl:call-template>
</xsl:when>
<xsl:when test="$price and number($price) != number($price)">
<xsl:call-template name="total-value">
<xsl:with-param name="price" select="$price[position() > 1]"/>
<xsl:with-param name="result" select="$result"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise><xsl:value-of select="$result"/></xsl:otherwise>
</xsl:choose>
</xsl:template>
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