The APL Orchard

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Adám

07:07

Is a hollow leaf an improvement? Compare the filled version:

The idea is to make the whole thing a bit less top-heavy, while also emphasising that the leaf is a ∇.

RikedyP

08:04

tbh I miss when the leaf had a pointy top and was more part of the cube, simply from an aesthetic preference. I don't think the gap in the leaf helps

Adám

@RikedyP You mean the "kite" shape?

RikedyP

@Adám Yeah but I don't mind and kind of see this as at least making it distinct from other cube shaped logos in a way

Adám

Yeah, exactly, and especially from Dyalog's:-)

Adám

08:29

Two APL cops: Vanilla and Extended

Bubbler

08:41

@Adám Extended one has a wrong TIO link

Adám

@Bubbler Thanks. Fixed.

Bubbler

also found the crack for vanilla rather quickly, because I figured there are very small number of ways to satisfy the parser

Adám

:-(

Adám

08:55

@Bubbler A reason you didn't post yet?

Bubbler

09:14

Currently digging into Extended one

This is wacky

Bubbler

09:26

Found two-char substitution, but one char is really uhh

Adám

:-)

Bubbler

10:13

@Adám Technically, both the cop and the (presumably) intended crack work on Dyalog 18.x, right?

Adám

@Bubbler Correct. I didn't use any Extended features. I just needed constant⍨.

Razetime

@Adám i think this may have given the idea away

Adám

@Razetime What do you mean?

Bubbler

@Razetime No, I wrote it after I got the working crack.

Razetime

oh interesting

Adám

10:19

Of course, ⍨ doesn't actually matter. At first, I had , instead, but I thought ⍨ was more interesting, and Extended would only confuse matters.

Bubbler

CMC: Change exactly two chars in ≢∊⎕A⍨¨⎕A to change the result from 676 to 286.

(not using ⎕AT)

Adám

@Bubbler Meh, I was about to suggest A⍨ → at

Bubbler

My intended solution does require extended (doesn't work in vanilla 18.x)

Adám

Oh, well that limits things.

CMC: In Extended, change one character in ≢⎕A,⌽⎕A to change the result from 52 to 51.

Bubbler

@Adám Change comma to ellipsis?

Adám

10:28

Yes.

5 hours later…

RikedyP

15:10

APL Problem Solving Competition phase 1 problems from 2013 and 2014 are being added to problems.tryapl.org

If anyone has some time and inclination, could you please try the 2013 and 2014 problems on oliverbazin.github.io/PracticeProblems/psets/2013.html and report any issues on GitHub github.com/Dyalog/PracticeProblems/issues ? Any help is very appreciated

Adám

15:27

Tweets are not limited to 140 chars any more.

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