Re: [xsl] length of string from a set of nodes.

Subject: Re: [xsl] length of string from a set of nodes.
From: Fred Christian <fredc@xxxxxxxxxx>
Date: Fri, 27 Mar 2009 11:14:23 -0700
This discussion helps much, thanks.

And of course, you could combine the two variables:

<xsl:variable name="slen" as="xs:integer" select="string-length(answers)"/>
I got an error when I tried that ???
XPTY0004: A sequence of more than one item is not allowed as the first argument of string-length()

Should it work?
I am using Saxon from the command line. java -jar "C:\saxon\saxon.jar .....

But when I used a combined version from Martin's suggestion with string-join.
<xsl:variable name="slen" as="xs:integer" select="string-length(string-join(answers, ''))"/>

It works great.

Interestingly, when I put a copy of your example in, but with an unused @name. I don't get an error. I guess it only hits the error when the variable is evaluated.

Michael Kay

-----Original Message-----
From: Fred Christian [mailto:fredc@xxxxxxxxxx] Sent: 27 March 2009 17:46
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: [xsl] length of string from a set of nodes.

I was able to get this to work, but while reading about it, I see all these little tips and recommendations regarding being efficient and not creating nodes when you only need strings.

In this code my goal was meet of deciding if the length of all the text concatenated together is greater than 30.
<xsl:variable name="strings" as="xs:string"><xsl:value-of select="answers"/></xsl:variable>
<xsl:variable name="slen" as="xs:integer"><xsl:sequence select="string-length($strings)"/></xsl:variable>
<xsl:for-each select="answers">
<xsl:when test="$slen gt 30"> etc...

I tried various combinations of using the <<concat()>> function, <<xsl:sequence>>, and <<xsl:value-of>>. This is what ended up working.

Is there a "better" way to do this?

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