Thanks for a quick reply Raul. I have printed off the parsing rules for later study and I use your workaround!
Richard > On 16 Oct 2021, at 15:30, Raul Miller <rauldmil...@gmail.com> wrote: > > What you are seeing here is that J needs to understand what names mean > before it can act on those names. > > A concise summary of the issues is visible here: > https://www.jsoftware.com/help/dictionary/dicte.htm > > In 'z; t 4' the evaluation of t 4 corresponds to the second line of > the parsing table which you see at the bottom of that page. > > EDGE+AVN VERB VERB NOUN 1 Monad > > Here, > EDGE+AVN corresponds to z > VERB (the left one) corresponds to ; > VERB (the right one) corresponds to t > and NOUN corresponds to 4 > > In other words, J's parsing rules mean that it needs to figure out > what z is before it can evaluate t 4. > > Alternatives you might try: > > z; (t 4) > z;] t 4 > (z);t 4 > > I hope this makes sense, > > -- > Raul > >> On Sat, Oct 16, 2021 at 10:14 AM Richard Donovan <rsdono...@hotmail.com> >> wrote: >> >> Hi. I write a function t, execute it, then execute it again. >> >> >> On the second execution, I want to display the intermediate result then the >> final result >> >> >> I have coded it as below >> >> >> The intermediate result is displayed as the intermediate result of the FIRST >> execution >> >> >> I was surprised as I thought J operates from right to left >> >> >> Thanks >> >> >> >> >> >> t=: 13 : 'z=:2*y' >> >> t 2 >> >> 4 >> >> z; t 4 >> >> +-+-+ >> >> |4|8| >> >> +-+-+ >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
