[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XSLT 2.0 courses?
> > filter($sequence,$function) => head() > > > > This seems nice, however it will probably filter the whole sequence and > > only then take the head() of the resulting sequence. > > > > Is there any guarantee that the evaluation of filter() will stop as soon as > > an initial item is produced? > > I wouldn't think there would be, given that filter() in general is > specified to filter the whole sequence. Maybe a smart optimizer can stop at the first filter result if the expression is: head( filter($sequence,$function)) Obviously we need a generators/co-routines mechanism... Would be ideal. Dimitre On Mon, Sep 21, 2020 at 12:17 PM Graydon graydon@xxxxxxxxx < xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > On Mon, Sep 21, 2020 at 07:06:21PM -0000, Dimitre Novatchev > dnovatchev@xxxxxxxxx scripsit: > > > filter($sequence,$function) => head() > > > > This seems nice, however it will probably filter the whole sequence and > > only then take the head() of the resulting sequence. > > > > Is there any guarantee that the evaluation of filter() will stop as soon > as > > an initial item is produced? > > I wouldn't think there would be, given that filter() in general is > specified to filter the whole sequence. > > I would in no way _object_ to a first-available() that's guaranteed to > stop as soon as it gets a true() result from $function. And there's > obviously a point past which one doesn't want to keep chaining > "otherwise". Frequency of the use-case might still be questionable. > > -- > Graydon Saunders | graydonish@xxxxxxxxx > CC&s oferC)ode, C0isses swC! mC&g. > -- Deor ("That passed, so may this.") > > -- 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? :) ------------------------------------- Sanity is madness put to good use. ------------------------------------- I finally figured out the only reason to be alive is to enjoy it.
|
PURCHASE STYLUS STUDIO ONLINE TODAY!Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced! Download The World's Best XML IDE!Accelerate XML development with our award-winning XML IDE - Download a free trial today! Subscribe in XML format
|