A bit late, but: Interesting try, testing if J is a man or a boy! May be of some help, here are a few observations:
I tried several smaller LHA's. Every time I get 5001 stack frames? Can you confirm this? The Python example sets a recursion depth of 1025 Profiling the Haskell example gives 722 iterations for function `a` (see Haskell program) with argument 10. ps I work with Linux so I don't know where to change values (if possible) in libj.so and or libjnative.so. Hallo Raul Miller, je schreef op 01-02-10 20:16: > I think I have figured out what this task specification > is asking for. So I wrote some J code that I expect > might work here. > > NB. http://rosettacode.org/wiki/Man_or_boy_test > > A=:4 :0 > ctx=.cocreate'' > B__ctx=:B > k__ctx=:x > '`x1__ctx x2__ctx x3__ctx x4__ctx x5__ctx'=:y > if.k__ctx<:0 do.a__ctx=:(x4__ctx + x5__ctx)'' else. ctx B '' end. > a__ctx > ) > > B=:4 :0 > ctx=.x > k__ctx=:k__ctx-1 > a__ctx=:k__ctx A ctx&B`x1__ctx`x2__ctx`x3__ctx`x4__ctx > ) > > 10 A 1:`_1:`_1:`1:`0: > > My problem is that this dies with a stack error. > > With debug turned on, #13!:13'' gives me 5001 > stack frames. > > So, searching jsoftware.com for pages dealing > with this issue (I know that the stack limit can > be lifted), I find: > > http://www.jsoftware.com/help/release/recurlim.htm > > So... first, I had to locate a copy of dumpbin and > editbin. And I am not sure what I should have been > doing if I were running on linux or a mac. > > Eventually, I located a copy -- it is not a standard > part of windows -- and then with some more work > I addressed a problem where it could not find a > .dll it needed. > > So, then, I tried editbin /stack:6000000 on my > j.exe, but when I ran this code again, it still blew > up with 5001 for #13!:13''. So I tried changing the > .dll again, this time changing the limit to 9000000 > but the coded died egain with the same size of > stack. > > So... how should I address this kind of problem? > > Thanks, > > -- Met vriendelijke groet, =@@i ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
