The APL Orchard

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Aiden Chow

12:51 AM

@B.Wilson wow u relax by coding in apl?? thats an interesting way

B. Wilson

1:27 AM

@AidenChow Trying to Pavlov condition my brain to associate good times with APL. Kind of working so far!

Aiden Chow

what the, why u feel the need to do that lmfao, and its working???

B. Wilson

@AidenChow It's just me trying to work around my own limitations. I'm bad at continuing on long-term endeavors (like learning deep APL) via sheer will power alone.

Aiden Chow

@B.Wilson certainly an interesting way i suppose......

B. Wilson

1:48 AM

@AidenChow Really? Effectively I'm just finding ways of having fun with APL.

5 hours later…

Slimey

7:12 AM

hey so for a physics project im going to make a thermophysics simulator. my backend is going to be apl. ill use a 2d array of temperatures to represent a grid of temperatures. i want to change the temperature of tiles adjacent to tiles with differing temperatures. the quad diamond comes to mind.
({⊂⍵}⌺3 3) 3 3⍴⍳9
this gives me a nested array of adjacent tiles. im wondering how i can make the border values default to something else than 0, because i want 0 to be a possible temperature in the array. having the border values be something other than 0 which is outside of the domain of temperatu…

B. Wilson

@Slimey The left function operand to Stencil ends up getting called dyadically, where ⍺ tells you what elements in ⍵ are "beyond the edge" fill elements.

Slimey

does it show the index of the elements or what?

B. Wilson

7:28 AM

@Slimey It's a vector of length ⍴⍴Y, so 2 in your case. Each element indicates how many fill elements extend beyond the border of the corresponding axis. Positive means to the left, negative means to the right.

Silas

8:05 AM

it's designed so {⍺↓⍵} removes the padding

1 hour later…

xpqz

9:17 AM

@Slimey This may be helpful: xpqz.github.io/learnapl/stencil.html#the-left-argument

Adám

9:55 AM

news.ycombinator.com/item?id=35369084

2 hours later…

Slimey

11:50 AM

yes, i figured it out. thanks!

xpqz

12:06 PM

@Adám This comment cracked me up: “ Matlab was created for people too dumb to use Fortran. APL was invented for people too smart to use Fortran.”

3 hours later…

RikedyP

3:02 PM

Announcement: Recordings from APL Seeds '23 are now available on dyalog.tv/APLSeeds23. Slides can be downloaded from our website: dyalog.com/apl-seeds-user-meetings/aplseeds23.htm

1 hour later…

LdBeth

4:13 PM

@xpqz Didn't seem them mentioned Chapel chapel-lang.org Unfortunately I have no access to any supercomputer resource, so anything I cannot make reasonably fast with APL are not fast either by switching to these compiled languages.