XSL for-each: how to detect last node?

Xslt

Xslt Problem Overview

I have this simple code:

<xsl:for-each select="GroupsServed">
  <xsl:value-of select="."/>,<br/>
</xsl:for-each></font>

I'm trying to add a comma for each item added.

This has 2 flaws:

  1. Case of when there's only 1 item: the code would unconditionally add a comma.
  2. Case of when there's more than 1 item: the last item would have a comma to it.

What do you think is the most elegant solution to solve this?

I'm using XSLT 2.0

Xslt Solutions

Solution 1 - Xslt

If you're using XSLT 2.0, the canonical answer to your problem is

<xsl:value-of select="GroupsServed" separator=", " />

On XSLT 1.0, the somewhat CPU-expensive approach to finding the last element in a node-set is

<xsl:if test="position() = last()" />

Solution 2 - Xslt

Final answer:

<xsl:for-each select="GroupsServed">
  <xsl:value-of select="."/>									
  <xsl:choose>
    <xsl:when test="position() != last()">,<br/></xsl:when>
  </xsl:choose>
</xsl:for-each>

Solution 3 - Xslt

<xsl:variable name="GROUPS_SERVED_COUNT" select="count(GroupsServed)"/>
<xsl:for-each select="GroupsServed">
    <xsl:value-of select="."/>
    <xsl:if test="position() < $GROUPS_SERVED_COUNT">
        ,<br/>
    </xsl:if>
</xsl:for-each></font>

Solution 4 - Xslt

Insert the column delimiter before each new item, except the first one. Then insert the line break outside the for-each loop.

<xsl:for-each select="GroupsServed">
  <xsl:if test="position() != 1">,</xsl:if>
  <xsl:value-of select="."/>
</xsl:for-each>
<br/>

In other words, treat every item like the last item. The exception is that the first item does not need a comma separator in front of it. The loop ends after the last item is processed, which also tells us where to put the break.

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Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionsivabudhView Question on Stackoverflow
Solution 1 - XsltStoborView Answer on Stackoverflow
Solution 2 - XsltsivabudhView Answer on Stackoverflow
Solution 3 - XsltGrigory KView Answer on Stackoverflow
Solution 4 - XsltDamianView Answer on Stackoverflow