Are you using the beta version (j903)? please type JVERSION inside J and show us the output.
If this is actually happening, then it's a bug. Could be something to do with this: https://code.jsoftware.com/wiki/Vocabulary/SpecialCombinations#Pre-Parsed_Parenthesized_Primitives_.28PPPP.29 On Tue, Sep 14, 2021 at 9:59 AM Jon Quant <quanty....@gmail.com> wrote: > Dear all, > > I have tried the following code and get unexpected results and wanted your > seasoned advice. > > kk=.i.5 > kk > 0 1 2 3 4 > kk=.>:kk > kk > 1 2 3 4 5 > i.5 > 1 2 3 4 5 > kk=.>:kk > i.5 > 2 3 4 5 6 > > So this modifies the behaviour of the 'i.' verb! Is there a (functional > programming) grammar rule that says we must not modify a variable/noun > which is also in the expression? > > Thanks > Jon > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
