Re: [xsl] Fwd: XSLT 2.0 Determining Position of Sequence Item During "for expression" evaluation

["Dimitre Novatchev" <dnovatchev@xxxxxxxxx>]

> I want to write a expression that does something like this...
>
> takes a sequence like this
>
> ("Page1","Page2","Page3")
>
> and outputs
>
> Page1 > Page2 > Page3
>
> so, assuming the sequence is in a variable $pages we try something like this...
>
> for $p in $pages
> return
>  concat( $p, ' > ')
>
> but of course, this causes a trailing ' > ' which we don't want...

This can be written as:

for $cnt in  count(  $pages )
            return
                (
                   ( for $cnt2 in $cnt,
                         $p in 1 to $cnt2 - 1
                            return
                               ($pages[$p],   '>')
                    ),
                    $pages[$cnt]
                 )

And the result is:

Page1 > Page2 > Page3 > Page4





--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play


On 3/16/07, John McGowan <john@xxxxxxxxxxx> wrote:
> > is not absolutely clear what you want to do, something like the
> > following may be useful:
> >
> >
> >    for $k in 1 to 10
> >       return (4 to 13)[$k]
> >
> >
> > To put it simply, an indexing variable in the range
> >
> >        1 to count($someSequence)
> >
>
> I'll try to explain a little better what I'm getting at...
>
> I want to write a expression that does something like this...
>
> takes a sequence like this
>
> ("Page1","Page2","Page3")
>
> and outputs
>
> Page1 > Page2 > Page3
>
> so, assuming the sequence is in a variable $pages we try something like this...
>
> for $p in $pages
> return
>  concat( $p, ' > ')
>
> but of course, this causes a trailing ' > ' which we don't want...
>
> so something like is what I'm looking for
>
> for $p in $pages
> return
>  concat($p, if (---sometest---) then '' else ' > ' )
>
> problem is, I can't figure out how to write an expression that can
> tell if this is the last item in the sequence.
>
> Does that explain it a little better?
>
> --
> John McGowan
> Seven A C Consulting, Inc.