thank you thank you. I now have a better understanding of the != operator
and preceding.
now we get to my real problem. I am trying to alternate row colors on a
table.
here is my xml:
<stocks>
<ticker>AAA</ticker>
<ticker>ABT</ticker>
<ticker>BIG</ticker>
<ticker>CBS</ticker>
<ticker>CBS</ticker>
<ticker>IBM</ticker>
<ticker>XYZ</ticker>
</stocks>
this style sheet works at producing the desired results of producing a table
each ticker displayed in each row.
<table>
<xsl:for-each select="stocks/ticker">
<tr>
<xsl:attribute name="bgcolor">
<xsl:choose>
<xsl:when test="position() mod 2 = 1">white</xsl:when>
<xsl:when test="position() mod 2 = 0">yellow</xsl:when>
</xsl:choose>
</xsl:attribute>
<td><xsl:value-of select="." />: Pos:<xsl:value-of select="position()"
/></td>
</tr>
</xsl:for-each>
</table>
gives me:
AAA: Pos:1
ABT: Pos:2 YELLOW BACKGROUND
BIG: Pos:3
CBS: Pos:4 YELLOW BACKGROUND
CBS: Pos:5
IBM: Pos:6 YELLOW BACKGROUND
XYZ: Pos:7
but, I don't want to display the cbs ticker twice, because it is a repeat.
So I add the appropriate if.
<table>
<xsl:for-each select="stocks/ticker">
<xsl:if test="not(. = preceding-sibling::ticker)">
<tr>
<xsl:attribute name="bgcolor">
<xsl:choose>
<xsl:when test="position() mod 2 = 1">white</xsl:when>
<xsl:when test="position() mod 2 = 0">yellow</xsl:when>
</xsl:choose>
</xsl:attribute>
<td><xsl:value-of select="." />: Pos:<xsl:value-of select="position()"
/></td>
</tr>
</xsl:if>
</xsl:for-each>
</table>
this gives me:
AAA: Pos:1
ABT: Pos:2 YELLOW BACKGROUND
BIG: Pos:3
CBS: Pos:4 YELLOW BACKGROUND
IBM: Pos:6 YELLOW BACKGROUND
XYZ: Pos:7
I have gotten rid of the duplicate, but now my alternating row colors are
wrong. looks like the position() cant be used here.
okay, so I have been reading around this similar problem and see that there
might be an answer with a recursive template and a parameter, but I haven't
gotten too far down that road. Is this the solution? I really need a
counter (parameter?) that increments each time the table row is displayed
and the row color is based on that. Is there a straighforward way of doing
this?
I appreciate all your help. You guys are great.
will
From: Mike Brown <mike(_at_)skew(_dot_)org>
Reply-To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: Re: [xsl] preceding...please help understanding...
Date: Sat, 7 Sep 2002 12:13:10 -0600 (MDT)
Bill Carter wrote:
> I am having trouble understanding preceding.
What you don't realize about preceding is not affecting your results.
The preceding axis picks up more nodes than preceding-sibling. You
probably want preceding-sibling. Otherwise, if you have something like
<foo>
<stocks>
<ticker>ZZZ</ticker>
<ticker>AAA</sticker>
</stocks>
<stocks>
<ticker>AAA</sticker>
<ticker>BBB</sticker>
</stocks>
</foo>
and you start at the BBB ticker, preceding::ticker picks up the first
ZZZ and AAA as well as the immediately preceding AAA.
preceding-sibling::ticker will get you just the ones you want.
What you're confused about, though, and this is what is skewing your
results,
is equality comparisons on node-sets.
$set1 = $set2 is true if any node in $set1 has a string-value equal to the
string-value of any node in $set2.
$set1 != $set2 is true if any node in $set1 has a string-value not equal to
the string-value of any node in $set2. != is very rarely what you want. Use
not() and = instead, like this:
not($set1 = $set2)
...which will be true if no node in $set1 has a string-value equal to the
string-value of any node in $set2.
Similar rules apply if instead of $set1 you have any other object type;
if the operand on the right is a node-set, then the string-value of the
left
operand is compared to the string-value of every node in the node-set.
- Mike
____________________________________________________________________________
mike j. brown | xml/xslt: http://skew.org/xml/
denver/boulder, colorado, usa | resume: http://skew.org/~mike/resume/
XSL-List info and archive: http://www.mulberrytech.com/xsl
_________________________________________________________________
Chat with friends online, try MSN Messenger: http://messenger.msn.com
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list