<ROTFL>Thanks for posting that! (no closing tag... I'm still chuckling silently!)
-jn- On Feb 9, 10:00 pm, Christian Catchpole <[email protected]> wrote: > This link cliams.. > > 22 is the number of partitions of 8, and 8 is the largest cube in the > Fibonacci sequence, and the Fibonacci sequence is the most popular FP > example. > > http://www.nabble.com/Why-tuples-only-to-22--td19962995.html > > But my brain isn't big enough to know if its a serious answer or > not. :) > > On Feb 10, 1:50 pm, Reinier Zwitserloot <[email protected]> wrote: > > > If you have inference, you can create TupleXes by chaining tuples. > > > So a (String, Integer, Double) tuple would be: > > > Pair<String, Pair<Integer, Double>>. > > > Then you add a light sprinkling of syntax sugar to make it not look > > ridiculous. > > > I don't understand why scala doesn't work this way. It would avoid > > littering the namespace with a tonne of these and having an arbitrary > > limit of 22. > > > A 'Pair' could then support asking how big it is (it would check if > > it's second element is a Pair, and if so, return that pair's size +1, > > and if not, return 2, or better yet, have a BGGA-esque Nothing/Void/ > > Undefined type and don't count those either). > > > On Feb 10, 3:20 am, Josh Suereth <[email protected]> wrote: > > > > They're actually unifying Function arguments and Tuples so you can use > > > them interchangeably (I believe in 2.8). In java this looks > > > ridiculuous, as you don't have scala's style of type-inference. My > > > guess would be that if tuple support isn't native to the language > > > currently, it will be in the future. > > > > Scala sometimes gets the syntactic-sugar wrong where you have to do > > > things like someFunction((x,y)), but in general it "just works". > > > It also supports extracting tuples using pattern matching like so: > > > val (x,y) = someFunction() > > > > which may look a lot uglier in java: > > > > (String x, int y) = someFunction(); > > > > but is still rather nice for a "pair" class. > > > > Also, as a Side note, Tony Morris's project "Functional Java" has a > > > Tuple class hidden in its bowels of Monads and Theory. It's actually > > > called a "Product" (the classes are named PN where N is a number from > > > 1-8) > > > Here's the > > > docshttp://functionaljava.googlecode.com/svn/artifacts/2.17/javadoc/index... > > > > On Feb 9, 8:48 pm, Michael Neale <[email protected]> wrote: > > > > > Thanks David ! > > > > > 22... interesting... > > > > How did they do the syntactic support for ( and ) to mean Tuple? Is it > > > > special or like anything else, just defs? > > > > > On Feb 10, 11:51 am, David Chuhay <[email protected]> wrote: > > > > > > Scala has tuple classes up to size 22 included in the base langauge > > > > > package. The (var1, var2, ...) syntax gets compiled into an > > > > > instantiation of the properly sized Tuple class. > > > > > > Michael Neale wrote: > > > > > > So how would you do it in scala ;) ? > > > > > > > (sorry I always find it crushing how easy everything is in scala, > > > > > > when > > > > > > I have to look at java). > > > > > > > Of course you can just do: > > > > > > > def foo() : (String, Int) = ("Hello", 42) > > > > > > > never looking into what scala *actually* does with tuples, if its > > > > > > something nasty or not... (someone else I am sure knows if it is a > > > > > > good or bad thing). --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "The Java Posse" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/javaposse?hl=en -~----------~----~----~----~------~----~------~--~---
