Re: OO-XQ-OO: to do or not to doLiam R E Quin liam at w3.org
Sat Mar 6 22:58:40 PST 2010
On Sat, 2010-03-06 at 19:57 +0100, James Fuller wrote: > ... if anyone has examples of large scale fp > development I would like to hear about it Last I heard (a few years ago) ebay had over a million lines of XSLT (4 million? not sure). But whether that's a good example is another matter. Maybe most of it is an implementation of character-to-code-point with a very large xslt:choose :-) :-) > (I know amazon had a > significant team earlier on and that there are a lots of gov/mil work > with fp but have yet to see commercial enterprise embrace) Part of that I think, especially in large US projects, is a tendency to use relatively low-level programmers and consultants, where Java means they do less damage than in C, or, worse, C++... Another part is that some functional languages (just as with imperative languages) are much better equipped for large projects than others. I think also some fp techniques have made it into mainstream programmer thinking even in the procedural world -- e.g. map and apply -- and hybrid languages that de-emphasise the functional aspects are quite popular too (Perl, for example, spells Lambda as "sub"...but does have higher order functions, map, apply, and probably combinators :-) ) One or the strengths of XSLT is that people who do not think of themselves as programmers can happily get their heads round it. XQuery is more up-front about being a programming language, with its fussier syntax, but it still does have a lot of that strength, and I suspect a lot of people use it, just as they use SQL, without ever thinking of it as "declarative". Liam -- Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/ Pictures from old books: http://fromoldbooks.org/ Ankh: irc.sorcery.net irc.gnome.org www.advogato.org
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