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2 unique lists
- To: xsl-list at mulberrytech dot com
- Subject: 2 unique lists
- From: Matthew Cordes <mcorde61 at maine dot edu>
- Date: Mon, 7 Aug 2000 11:41:35 -0400
- References: <200008041401.KAA17903@mulberrytech.com>
- Reply-To: xsl-list at mulberrytech dot com
Hello all.
This another question about deriving a unique list from xmldata, but I think
mine is a little different. I have the following xml:
<schedule>
<person name="person1">
<date>Feb2000</date>
<date>Mar2000</date>
<date>Apr2000</date>
<date>Feb2000</date>
<date>Mar2000</date>
<date>Apr2000</date>
<date>Feb2000</date>
<date>Mar2000</date>
<date>Apr2000</date>
<date>Feb2000</date>
<date>Mar2000</date>
<date>Apr2000</date>
</person>
<person name="person2">
<date>Feb2000</date>
<date>Mar2000</date>
<date>Apr2000</date>
<date>Feb2000</date>
<date>Mar2000</date>
<date>Apr2000</date>
<date>Feb2000</date>
<date>Mar2000</date>
<date>Apr2000</date>
<date>Feb2000</date>
<date>Mar2000</date>
<date>Apr2000</date>
</person>
</schedule>
and from this I want two unique lists of dates, thus
person1: Feb2000, Mar2000, Apr2000.
person2: Feb2000, Mar2000, Apr2000.
Here is the first stylesheet, using preceding:
<xsl:template match="person">
<xsl:value-of select="@name"/><xsl:text>: </xsl:text>
<xsl:for-each select="date[ not( . = preceding::date )]">
<xsl:value-of select="."/>
<xsl:if test="not(position()=last())">, </xsl:if>
</xsl:for-each>
</xsl:template>
which produces:
person1: feb2000, mar2000, Apr2000
person2:
I also tried the key method:
<xsl:key name="thedate" match="date" use="."/>
<xsl:template match="person">
<xsl:value-of select="@name"/><xsl:text>: </xsl:text>
<xsl:for-each select="date[generate-id(.) = generate-id(key('thedate',.)[1])]">
<xsl:value-of select="."/>
<xsl:if test="not(position()=last())">, </xsl:if>
</xsl:for-each>
</xsl:template>
which produced the same result. Can anyone offer any suggestions? Also I'm not sure
I understand what the key method is doing can someone provide a detailed explanation?
-matt
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