Hi, is the following what you want ?
1 2 3 (+ ; * ; -) 6 7 8 ┌──────┬───────┬────────┐ │7 9 11│6 14 24│_5 _5 _5│ └──────┴───────┴────────┘ On Fri, Dec 6, 2019 at 9:54 PM ethiejiesa via Programming < programm...@jsoftware.com> wrote: > Am I just doing something silly? Or does @. really not support building > trains > when the right operand is a verb? Here is an overly minimal example of > what I > want: > > (1:)`+`(1:)@.(0 1 2) 0 > 2 > (1:)`+`(1:)@.(0 1 2"_) 0 > |rank error > | (1:)`+`(1:)@.(0 1 2"_)0 > > This is an obvious enough feature, that I feel I must be missing some > obvious > construction. > > For context, I was futzing around with this year's Advent of Code[0], day > 2, > and found myself wanting a fork-like that behaves as > > x (u v w) y <-> (x u y) (x v y) (x w y). > > After sufficient floundering, I decided to just read NuVoc for all > modifiers > and discovered that I had somehow not noticed the usefulness of @. > However, the > above restriction really surprised me. > > Anyway, happy holidays, J birds. > > [0]:https://adventofcode.com/2019/ > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
