[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: how to split word into sequence of letters
On Fri, Aug 17, 2012 at 11:54 PM, Michael Kay <mike@xxxxxxxxxxxx> wrote: > > That rather depends on the time complexity of substring(). > > Saxon should evaluate substring() in constant time once it has established > that the string contains no surrogate pairs, which is only done once for a > given string. > > Michael Kay > Saxonica This is exactly what I meant by "in the absence of a good optimizer" -- there certainly are XSLT processor that have optimal implementation for substring(). Should we assume that every XSLT processor is that smart? I believe -- not. Of course, measurements will definitely show what is the case with a specific XSLT processor. The results could also be possibly different for substring() with a string literal as its first argument and when the first argument is the string value of a node (calculated). Cheers, Dimitre > > > > On 18/08/2012 04:33, Dimitre Novatchev wrote: >> >> On Fri, Aug 17, 2012 at 7:17 PM, Mukul Gandhi <gandhi.mukul@xxxxxxxxx> >> wrote: >>> >>> Hi Robby, >>> Here's another variant of the solution, >>> >>> for $x in 1 to string-length($stringVal) return substring($stringVal, $x, >>> 1) >>> >>> But the solution with string-to-codepoints(..) etc is equally good. >> >> >> The solution given by Michael Kay: >> >> for $c in string-to-codepoints($s) return codepoints-to-string($c) >> >> can be much more efficient (linear time complexity) than the above >> expression that calculates substring N times. (O(N^2) in the absence >> of a good optimizer). >> >> >> Cheers, >> Dimitre. >> >> >>> On Fri, Aug 17, 2012 at 8:04 PM, Robby Pelssers <Robby.Pelssers@xxxxxxx> >>> wrote: >>>> >>>> Hi guys, >>>> >>>> Probably the stupidest question since a while but what would be the >>>> preferred way to split a word into a sequence of letters ;-) >>>> >>>> Cheers, >>>> Robby >>> >>> >>> >>> >>> -- >>> Regards, >>> Mukul Gandhi > -- 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 ------------------------------------- Facts do not cease to exist because they are ignored. ------------------------------------- I finally figured out the only reason to be alive is to enjoy it.
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