Subject: Re: [xsl] Interpretaion of grouping for-each From: "james walker" <jameswalkerandy@xxxxxxxxxxx> Date: Tue, 04 Nov 2003 10:51:03 +0000 |
From: "james walker" <jameswalkerandy@xxxxxxxxxxx> Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx Subject: Re: [xsl] Interpretaion of grouping for-each Date: Tue, 04 Nov 2003 10:24:03 +0000
What does count() =1 represent (got a bit confused about jeni's explanation)
"and"count(. | .....) =1 id the currently selected viewdata is that first element. so
Just to be clear, am i right in saying that "viewentry{key('ve-by-firstocc', substring(entrydata[3]/text,1,1))[1]]" selects the first of each group of viewentries with the same key (including groups which only have one viewentry in it)?
From: David Carlisle <davidc@xxxxxxxxx> Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx Subject: Re: [xsl] Interpretaion of grouping for-each Date: Mon, 3 Nov 2003 17:02:29 GMT
> Does it go through viewentries which have dont have repeat key values?
No it selects the first (in document order) viewentry with each key value (even if that key value is not repeated).
See any description of muenchian grouping, eg Jeni's site.
<xsl:for-each select="viewentry that selects all viewentries then key('ve-by-firstocc', substring(entrydata[3]/text,1,1)) selects al the entries with the same key, so key('ve-by-firstocc', substring(entrydata[3]/text,1,1))[1] selects the first of that group and count(. | .....) =1 id the currently selected viewdata is that first element. so viewentry[....] just selects the first entry in each group as teh predicate is false in other case.
David
-- http://www.dcarlisle.demon.co.uk/matthew
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