[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Re: OOXML
> That link was to a discussion on transitive closures (a property of graphs), > not the closures I was talking about > [http://en.wikipedia.org/wiki/Closure_(computer_science)]. Not so much OO > as one way to implement OO. > But *that* kind of closure has also been implemented and around for a long time. Any partial application of foo(x1,x2,..., xN) over its first N - k arguments "is a function that is evaluated in an environment containing one or more bound variables" -- in this case N - k bound variables. This was first made available for XSLT 1.0 in FXSL 1.x in 2002 here: http://fxsl.sourceforge.net/articles/PartialApps/Partial%20Applications.html The same approach, but implemented using the much higher expressive power of XSLT 2.0 (using the <xsl:function> instruction) was implemented around 2004 in FXSL 2.0 and is discussed here: http://www.idealliance.org/papers/extreme/proceedings/xslfo-pdf/2006/Novatchev01/EML2006Novatchev01.pdf To summarize, we have had closures (as defined at [http://en.wikipedia.org/wiki/Closure_(computer_science)]) in XSLT for many years. -- 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 ------------------------------------- You've achieved success in your field when you don't know whether what you're doing is work or play On Tue, Jul 1, 2008 at 3:37 AM, Deborah Pickett <debbiep-list-xsl@xxxxxxxxxx> wrote: > Dimitre Novatchev wrote: >>> >>> Case in point: I don't consider XSLT to be functional because of the >>> hoops >>> you have to go through to get something resembling lambda functions. >>> [...] >> >> Not exactly lambda-functions, but various ways of creating dynamically >> new functions are well-known and have been supported with FXSL for >> years: > > [snip] > > Yes, those hoops are the ones I was talking about. > >>> Closures are something I'd be curious to see done in XSLT, though I still >>> have never come across a programming problem in real life that was best >>> solved by using them. >> >> Has been done for quite some time; see: >> http://dnovatchev.spaces.live.com/blog/cns!44B0A32C2CCF7488!384.entry > > That link was to a discussion on transitive closures (a property of graphs), > not the closures I was talking about > [http://en.wikipedia.org/wiki/Closure_(computer_science)]. Not so much OO > as one way to implement OO.
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