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Re: [xsl] Increasing sequence ?
Subject: Re: [xsl] Increasing sequence ? From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Thu, 26 Mar 2015 02:42:05 -0000 |
On Wed, Mar 25, 2015 at 11:51 AM, Wolfgang Laun wolfgang.laun@xxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: >> not($seq[2]) or $seq[1] lt $seq[2] and increasing(subsequence($seq, 2)) > > > It would appear that this makes -1,0,2,1 an ascending sequence. I dislike > this "empty-is-false trick" - once in a while you get bitten. > > count($seq) < 2 or ... Yes, good to remind that we are dealing with items -- not just nodes. > count($seq) < 2 or ... No, the idea is to avoid count, as this may add the time for one unnecessary pass over the sequence. And the solution can be adjusted naturally: <xsl:function name="my:increasing" as="xs:boolean"> <xsl:param name="pSeq" as="item()*"/> <xsl:sequence select= "empty($pSeq[2]) or $pSeq[1] lt $pSeq[2] and my:increasing(subsequence($pSeq, 2))"/> </xsl:function> -- Cheers, Dimitre Novatchev --------------------------------------- Truly great madness cannot be achieved without significant intelligence. --------------------------------------- To invent, you need a good imagination and a pile of junk ------------------------------------- Never fight an inanimate object ------------------------------------- To avoid situations in which you might make mistakes may be the biggest mistake of all ------------------------------------ Quality means doing it right when no one is looking. ------------------------------------- You've achieved success in your field when you don't know whether what you're doing is work or play ------------------------------------- To achieve the impossible dream, try going to sleep. ------------------------------------- Facts do not cease to exist because they are ignored. ------------------------------------- Typing monkeys will write all Shakespeare's works in 200yrs.Will they write all patents, too? :) ------------------------------------- I finally figured out the only reason to be alive is to enjoy it.
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