Subject: RE: Calling a template recursively
From: "Andrew Welch" <ajwelch@xxxxxxxxxxxxxxx>
Date: Mon, 5 Jul 2004 07:20:32 +0100
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> Hello List,
> I am using following template to display a
> <br> tag after every 25th character of the string. But
> that does not seem to work.
>
> <xsl:template name="normaliseString">
> <xsl:param name="releaselevel"/>
> <xsl:variable name="temp"
> select="substring($releaselevel,1,25)"/>
> <xsl:value-of select="$temp"/>
> <xsl:text><br> </xsl:text>
> <xsl:if test="string-length($releaselevel) >25">
>
> <xsl:variable name="temp2"
> select="substring($temp,26,string-length($releaselevel))"/>
> <xsl:value-of select="$temp2"/>
> <xsl:call-template name="normaliseString">
> <xsl:with-param name="releaselevel"
> select="@temp2"/>
> </xsl:call-template>
> </xsl:if>
>
> </xsl:template>
>
> any suggestion.
Hi,
You forgot to say why your template 'didn't seem to work' so I've had to
guess ;-) I think you just want the standard tail-recursive string
processing template. This involves ensuring the recursive part of the
template is the last operation in the template, allowing the compiler to
flatten the recursion into a set of if-elses (which is more memory
efficient).
<xsl:template name="normaliseString">
<xsl:param name="releaselevel"/>
<xsl:choose>
<xsl:when test="string-length($releaselevel) < 25">
<xsl:value-of select="$releaselevel"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="substring($releaselevel, 1, 25)"/>
<br/>
<xsl:call-template name="normaliseString">
<xsl:with-param name="releaselevel"
select="substring($releaselevel, 25)"/>
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
cheers
andrew
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