@J.Sallé Yeah, you need either 1 ¯1+⊢ or 1 ¯1∘+, but you also have multiple monadic functions in a row, ⊃⌽, so you need jots, 2+(2*⊃)2×∘⊃∘⌽1 ¯1+⊢ or parens, 2+(2*⊃)2×(⊃(⌽1 ¯1+⊢)) or just go with a dfn, {2+(2*⊃)2×⊃⌽1 ¯1+⍵}.
@J.Sallé Without trying to trainify it, why do you need to add 1 ¯1 if you're gonna use only the last element? It could be ¯1+⊃⌽<arg goes here> instead.
@EriktheOutgolfer 27km is not much of a bike ride, even in the hills of Hampshire - less than an hour on the bike :-). Seriously, I would be very interested in feedback on the webinar, from anyone who had the time to watch it. I'm particularly interested in reactions from people who are still relatively new to the technology.
@Pavel Btw, you can have a function run every time APL starts to initialise settings and load stuff you often use. Have a look at ]??USetup: Try it online but run it locally for exact info as it applies on your machine.
@Pavel The user command system (currently) displays help with ]?CommandName (in 17.0 I'm deprecating this in favour of ]CommandName -?, though the old syntax will still work for now). If the user adds additional commands on his own and documents them, the documentation for them will be displayed by the same syntax. The new ]Help is intended to help you with things that do not have documentation build-into them.
@EriktheOutgolfer Nothing, you can still email me directly, but I spoke with my colleagues, and it is ok to write support@dyalog.com in full (it gets lots of spam anyway) and the support team will redirect requests to me. Also, this room is becoming more and more official, so it shouldn't really depend on me personally.