:D Thanks for the explanation, I understand now; for the real task, there is a specific argument which I did not see, and I never will :)
On Thu, Dec 7, 2017 at 5:50 PM, Arie Groeneveld <[email protected]> wrote: > I understand. It's perfect for working with the small example inputs. > Thanks for the patch. > > For the real task using ^:a: destroys my J session so I modified the verb > using ^:(_) and a 'local' counter (first box contains the number of jumps) > . That's all. > > > > Op 07-12-17 om 23:27 schreef Jose Mario Quintana: > > Oh, maybe I was not clear enough, the verb, >> >> cj=. <:@:#@:((([ + (- (_ * 0 > ]))@:[ { ]) ; >:@{`[`]})&>/ ::]^:a:@(0&;)) >> >> is meant to be a patched version of your original verb based on the form >> ^:a:, >> >> (([ + { ) ; >:@{`[`]})&>/ ::]^:a:@(0&;) >> >> and it seems to produce the same number of jumps answers as those produced >> by, >> >> ((1+0&{::);((+_*0>])@([+{);>:@{`[`]})&>/@}.) ::]^:(_) >> >> for a couple of examples; namely, >> >> cj 0 3 0 1 _3 >> 5 >> cj 0 _2 0 0 >> 3 >> >> vis-a-vis >> >> ((1+0&{::);((+_*0>])@([+{);>:@{`[`]})&>/@}.) ::]^:(_) 0;0;0 3 0 1 _3 >> ┌─┬─┬──────────┐ >> │5│5│2 5 0 1 _2│ >> └─┴─┴──────────┘ >> ((1+0&{::);((+_*0>])@([+{);>:@{`[`]})&>/@}.) ::]^:(_) 0;0;0 _2 0 0 >> ┌─┬─┬────────┐ >> │3│_│2 _1 0 0│ >> └─┴─┴────────┘ >> >> I thought the exercise was just to find the number of jumps... Is it not? >> >> Perhaps I am still making more noise :) >> >> >> >> On Thu, Dec 7, 2017 at 2:19 PM, Arie Groeneveld <[email protected] >> > >> wrote: >> >> >>> Op 07-12-17 om 18:27 schreef Jose Mario Quintana: >>> >>> I really do not know exactly what the original was doing, or what the >>>> task >>>> really is, but if the issue was that negative indices are valid for { >>>> then >>>> replacing it by (- (_ * 0 > ]))@:[ { ] should do the trick. >>>> >>>> kind of, so forcing the index to plus infinite will do the job: >>> >>> ((1+0&{::);((+_*0>])@([+{);>:@{`[`]})&>/@}.) ::]^:(_) 0;0;0 _2 0 0 >>> ┌─┬─┬────────┐ >>> │3│_│2 _1 0 0│ >>> └─┴─┴────────┘ >>> >>> >>> Moreover, >>> >>>> counting the jumps in this context seems to be the number of the >>>> resulting >>>> items minus one; thus, >>>> >>>> no, not for this task. It destroys my J session. So I need a counter. >>> >>> >>> >>> ---------------------------------------------------------------------- >>> 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 > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
