Subject: Re: [xsl] How to stream-process non-XML text using unparsed-text-lines( ) ? From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Thu, 24 Jul 2014 21:44:59 -0000 |
On Thu, Jul 24, 2014 at 10:07 AM, <mike@xxxxxxxxxxxx> wrote: > let $x := unparsed-text-lines(...) > > return ($x[1000], $x[10]) > > Saxon implements $x using a data structure called a MemoClosure where items > from the input are read on-demand, and then remembered. Reading $x[1000] > will cause the first 1000 items to be read and retained in memory; reading > $x[10] finds that the tenth item is already in memory Maybe not store the 1000 lines, except the last, but just create a map N --> offset(N) for the Nth line, N < 1000 This way, if we store what was read (or if it already is conveniently accessible by offset), then we will retrieve it again only on demand. Reminds me of <xsl:key> and the key() function -- and maybe something like key() for streamed data could be designed this way -- obviously requiring two (partial/on-demand) passes. Just thinking aloud about 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? :) ------------------------------------- I finally figured out the only reason to be alive is to enjoy it.
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