One can get the last row of (3 (0 1 1 1 0 1 1 0 {~ #.)\ 0 0 , ] , 0:)^:(<11) 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 0 1 1 1 0 0 1 1 0 0 0 0 1 1 0 1 0 1 1 1 0 0 0 1 1 1 1 1 1 1 0 1 0 0 1 1 0 0 0 0 0 1 1 1 0 1 1 1 0 0 0 0 1 1 0 1
as follows, (3 (0 1 1 1 0 1 1 0 {~ #.)\ 0 0 , ] , 0:)^:10 (1) 1 1 1 0 0 0 0 1 1 0 1 Likewise, NB. WARNING: save your work! (3 (0 1 1 1 0 1 1 0 {~ #.)\ 0 0 , ] , 0:)^:_ (1) will keep computing, what is meant to be computing, presumably until it runs out of resources or the process is killed by external means. Similarly, one can get a list that includes the relevant bits of the last row of {&0 1 1 1 0 1 1 0@#.\~&3^:(<11) (,1,])(0#~20) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 as follows, {&0 1 1 1 0 1 1 0@#.\~&3^:10 (,1,])(0#~20) 1 1 1 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 and, in general, {&0 1 1 1 0 1 1 0@#.\~&3^:N (,1,])(0#~ 2 * N)... Alas, {&0 1 1 1 0 1 1 0@#.\~&3^:_ (,1,])(0#~ 2 * _) |domain error | {&0 1 1 1 0 1 1 0@#.\~&3^:_(,1,])(0 #~2*_) Unlike (3 (0 1 1 1 0 1 1 0 {~ #.)\ 0 0 , ] , 0:)^:_ (1), the process cannot start. The question is: what is an alternative way to launch {&0 1 1 1 0 1 1 0@#.\~&3^:_ successfully? On Fri, Feb 11, 2022 at 7:00 PM Elijah Stone <elro...@elronnd.net> wrote: > > On Fri, 11 Feb 2022, Jose Mario Quintana wrote: > > > However, I could not figure out how to use your version to reproduce the > > usual example. Can you show us how to do it? > > {&0 1 1 1 0 1 1 0@#.\~&3^:(<11) (,1,])(0#~20) > 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 1 1 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 1 1 0 1 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 0 0 0 0 1 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 0 0 1 1 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 1 1 1 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > > The pattern slides to the left due to padding (because \ lops off the ends > at each iteration) but is definitely there. > > -E > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm