I want to select elements from an array based on some test. Currently, I am trying to do that with a compression, and I would like to write it as a tacit function. (I'm very new to APL, so feel free t...

#!/usr/bin/dyalog -script ⍝ /usr/bin/dyalog is a symlink to /opt/mdyalog/18.0/64/unicode/mapl factors←{⎕ML ⎕IO←1 ⋄ ⍵{ ⍵,(⍺÷×/⍵)~1}∊⍵{(0=(⍵*⍳⌊⍵⍟⍺)|⍺)/⍵}¨⍬{nxt←⊃⍵ ⋄ msk←0≠nxt|⍵ ⋄ ∧/1↓msk:⍺,⍵ ⋄ (⍺,nxt)...

I have a menu with a submenu and would like to simulate a user interaction where the user clicks on the menu and then on a submenu using ⎕NQ. However, I can only simulate one event; the subsequent one...

APL is great for array type problems but I'm curious as to how best work with graphs in APL. I'm playing around with leet questions, for example question 662. Maximum Width of Binary Tree, the exercis...