Subject: Re: [xsl] [XPath 3.0] How to do partial function application on the min() function? From: Dimitre Novatchev <dnovatchev@xxxxxxxxx> Date: Mon, 29 Oct 2012 15:14:03 -0700 |
On Mon, Oct 29, 2012 at 2:50 PM, Costello, Roger L. <costello@xxxxxxxxx> wrote: > Hi Folks, > > I would like to fix one argument of the min() function to 2 and leave the other argument undefined, thus producing a partially applied function. Then, I would like to give the partially applied function a value. Here's what I tried: > > let $min2 := min((?,2)) > return $min2(3) > > I get this error: Unexpected token "?" in path expression Min has a single argument, which is a sequence. Therefore: > let $min2 := min((?,2)) isn't correct, indeed, because the argument placeholder doesn't substitute the whole and only argument of the function. It seems to me the what you want is: let $min2 := $compose(min#1, $makeSequence(?,2)) return $min2(3) where $compose should be similar to what was already discussed in this list a few days ago and $makeSequence() must be essentially the same as LISP's cons() funxction. Cheers, Dimitre > > What's the correct way to accomplish this? > > /Roger > -- 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. ------------------------------------- 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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