Re: [xsl] finding out distinct node/values

[Andrew Welch <andrew.j.welch@xxxxxxxxx>]

> And, please, hit me over the head: where is the second (hidden?) loop
> that would make this O(n^2)?

Here:

>> >    <xsl:for-each select="/table/rows/row/name">
>> >      <xsl:if test="not(. = preceding::name)">

If that is

test=". = key(....)[1]"

then for every n you are doing 1 comparison.

If you use the preceding axis:

test="not(. = preceding::name)"

then for every n, you are doing n comparisons (well n - 1) so thats
where the n^2 comes from.

I guess it might be more apparent if written like this:

<xsl:for-each select="/table/rows/row/name">
  <xsl:for-each select="preceding::name">
    <!-- do comparison -->


cheers
--
Andrew Welch
http://andrewjwelch.com
Kernow: http://kernowforsaxon.sf.net/