RE: [xsl] Re: XPath parsing or Extending MSXML

["Robert Koberg" <rob@xxxxxxxxxx>]

Hi,

Since you are going to use Jscript you do something like:

<abc>
  <a num="123">
  <a num="545">
  <a num="76">
</abc>

var vals = docelem.selectNodes("//a");
var sum = 0;
for (var i=0; I < values.length; i++) {
  var val = vals.item(i);
  var int = val.getAttribute("num");
  sum += int;
}

Or perhaps (version 3):

var e = new Enumerator(docelem.selectNodes("//a"));
var sum = 0;
for (;!e.atEnd();e.moveNext()) {
  x = e.item();
  var int = new Number(x.getAttribute("num"));
  sum += int;
}

Best,
-Rob


> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx [mailto:owner-xsl-
> list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Dimitre Novatchev
> Sent: Friday, June 13, 2003 10:30 AM
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> 
> > The MSXML4 parser can only return nodesets or single nodes when you give
> it some XPath expression. I need the possibility to > use the sum, count
> (and other functions) to get integer, string and boolean values as well.
> 
> The XPath Visualizer (working with MSXML3) successfully obtains a string,
> boolean or numeric result of XPath expressions. It  is possible to use the
> same technique with MSXML4, too.
> 
> The possibilities to evaluate any XPath expression with the selectNodes()
> and selectSingleNode() methods are even more limited than described --
> using
> these methods it is not possible to evaluate an XPath expression, which
> involves two or more completely independent node-sets -- e.g. find the
> intersection or union of ns1 (contained in var objNodeList1)  and ns2
> (contained in var objNodeList2).
> 
> However, there are other ways to evaluate such XPath expressions -- the
> Exslt for MSXML4 implementation is using one such technique.
> 
> Therefore, I'd recommend studying the source code of the XPath Visualizer
> and of Exslt for MSXML4.
> 
> 
> =====
> Cheers,
> 
> Dimitre Novatchev.
> http://fxsl.sourceforge.net/ -- the home of FXSL
> 
> 
> 
> 
> "Marcus Andersson" <marcan@xxxxxxx> wrote in message
> news:009901c331c8$5b422e70$03a8a8c0@xxxxxxxxxxx
> > Hello
> >
> > I have come to the point where I have to add some functionality to
> MSXML4
> (in javascript) and it's capabilities to do XPath queries. The MSXML4
> parser
> can only return nodesets or single nodes when you give it some XPath
> expression. I need the possibility to use the sum, count (and other
> functions) to get integer, string and boolean values as well. The only
> solution I have come up with is to parse the XPath expression and build
> some
> object tree that I execute against the MSXML parser.  So my question is:
> Is
> there any state diagram (I want to base the parser on it) publicly
> available
> for XPath or is the only solution to build this diagram to go through the
> spec?
> >
> > If anyone has another solution (ie not evaluate with a state machine
> based
> parser) I will be more than happy to hear of it...
> >
> > /Marcus
> >
> > ps. I have thought of using XSLT to do this but I don't want to invoke
> the
> processor for every little calculation ds.
> >
> >  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> >
> >
> 
> 
> 
> 
> 
> 
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list


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