I am aware that executing code with ". relying on explicit context can trip 13 : , for instance,
u=. 3 : '".''+:y''' u 5 10 v=. 13 : '".''+:y''' v 5 2 v 2: I am not quite sure but probably there are more glitches, according to, NuVoc 13 : https://code.jsoftware.com/wiki/Vocabulary/com#m13 "If you get exotic, you may encounter a bug or two in the implementation of 13 :" On Wed, Oct 17, 2018 at 1:39 PM Martin Kreuzer <i...@airkreuzer.com> wrote: > José - > > Thanks for pointing out that issue in the first place. > > I wasn't aware of the compiler module being overzealous sometimes ... > > Are there any other known (I'm fighting for > words, might I call them) 'glitches' comparable to this one, and > where would they be documented for lookup..? > > -M > > At 2018-10-17 16:25, you wrote: > > >Martin, > > > >In my example, using + instead of -, u was the double of a single roll and > >v was the sum of two "independent" rolls. > > > >Yours is a far better example for illustrating the issue, > > > > ( u=. 3 : ' T - (T=. ? y)' ) > >3 : ' T - (T=. ? y)' > > > >u is one roll minus itself which produces zeroes; whereas > > > > ( v=. 13 : ' T - (T=. ? y)' ) > >? - ? > > > >is the difference of two "independent" rolls. > > > >Thus, for example, > > > > u 0 0 0 0 0 > >0 0 0 0 0 > > > >whereas, > > > > v 0 0 0 0 0 > >_0.0389238 0.321837 0.0862073 0.552116 _0.134629 > > > >Thanks! I had one of those moments after I read your posts... Why did I > >not think of that? :) > > > > > >On Wed, Oct 17, 2018 at 8:08 AM Martin Kreuzer <i...@airkreuzer.com> > wrote: > > > > > Addendum: > > > > > Consider, in contrast, the behaviour of this *explicit* definition: > > > > > ee=. 3 : 'T - T=. ?y' > > > ee 10+i.7 > > > 0 0 0 0 0 0 0 > > > > > Same result as working *outside* a verb definition: > > > > > ] T=. ? 10+i.7 > > > 6 6 0 9 12 1 5 > > > T - T > > > 0 0 0 0 0 0 0 > > > > > -M > > > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
