xsl-list
[Top] [All Lists]

Re: Re: generalized unique element

2002-09-11 07:58:41
Laura Jenkins wrote:

<xsl:key match="*" use="name(.)" name="all-nodes"/>
...
<xsl:if test="count(.| key('all-nodes', name(.))[1]) = 1">

It works fine, i however do not understand what goes on 
in the above line..
I would be thankful if u can please explain me the
1.use of count in the above statement.
2.especially the use of key('',xx)[1] above ..

It looks like we're building up a table of occurrences for node names in the 
first statement, then testing to see if this is the first time we've seen that 
name. The sort of thing that other languages might use a hash table for, 
somewhere inside a loop:

$node{$name}++;
if ($node{$name} == 1) {
  # do the thing ...
}

Apologies for the potentially unclear explanation, XSLT is only just beginning 
to get itself around my head (definitely not the other way around).

 Stewart



 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list



<Prev in Thread] Current Thread [Next in Thread>