APL - TopAnswers

TopAnswers APL

Meta

Adám Adám

2 [APL](https://aplwiki.com) and APL-like languages (e.g. [J](https://aplwiki.com/wiki/J), [K](https://en.wikipedia.org/wiki/K_(programming_language)) and [Q](https://en.wikipedia.org/wiki/Q_(programming_language_from_Kx_Systems))), along with [array programming](https://en.wikipedia.org/wiki/Array_programming) in any language (e.g. [NumPy](https://en.wikipedia.org/wiki/NumPy), [Julia](https://en.wikipedia.org/wiki/Julia_(programming_language)), and [MatLab](https://en.wikipedia.org/wiki/MATLAB)) (especially if in comparison to APLs).

RikedyP

1 APL only

Adám

1 There are [only 227](https://stackoverflow.com/questions/tagged/apl) questions tagged `apl` on SO. There are also [368](https://stackoverflow.com/questions/tagged/j) tagged `j` and [46](https://stackoverflow.com/questions/tagged/k) tagged `k`.

Jack Douglas

0 Dyalog only

Adám

Are there any test cases or benchmarks for APL implementations? 1

implementation performance

Bubbler Bubbler

2 I don't know of any attempt to publish general test cases as a resource for developers, although I think that would be hugely valuable project (and I've made writing specifications and tests a high priority in BQN development). The biggest issue for making dialect-agnostic tests would probably be the primitives where symbols are completely different between dialects. One approach might be to write the tests using special unambiguous symbols, and convert them before running.

Marshall Lochbaum

codegolf.ta-like banner indicating scope of topanswers.xyz/apl 3

RikedyP RikedyP

BQN spec: changes for 1.0 11

Discussion

bqn

Marshall Lochbaum Marshall Lochbaum

3 (DONE) Inverse headers

Marshall Lochbaum

2 (DONE) High-rank array notation

Marshall Lochbaum

1 (1.1?) Mutable namespace fields

Marshall Lochbaum

1 (1.1?) Default values in namespace destructuring

Marshall Lochbaum

1 (DONE) Rank-tolerant Join (`∾`)

Marshall Lochbaum

1 (DONE) Predicates

Marshall Lochbaum

1 (DONE) Roles and immediateness with multiple headers?

Marshall Lochbaum

1 (REMOVED) 2-modifier partial application

Marshall Lochbaum

1 (DONE) Structural Under

Marshall Lochbaum

0 (DONE) Assignment placeholder

Marshall Lochbaum

0 (DONE) Enlist/Pair (`⋈`)

Marshall Lochbaum

0 (DONE) One-argument modified assignment

Marshall Lochbaum

0 (REMOVED) Returns

Marshall Lochbaum

What initial set of tags do we want? 30

Meta

Jack Douglas Jack Douglas

1 Initial tags

Adám

0 https://aplwiki.com/wiki/Category:Paradigms

RikedyP

0 Yeah are we gonna go hard with the dialects?

RikedyP

Time testing a Dyalog Idiom on large array

Joe Killian Joe Killian

0 From the [documentation](http://help.dyalog.com/16.0/Content/Language/Defined%20Functions%20and%20Operators/Search%20Functions%20and%20Hash.htm "Search Functions and Hash Tables"):

Adám

BeamQN Design and Implementation 17

Discussion

implementation

Rowan Rowan

1 Additional thoughts.

Rowan

0 It's Vegabook here (Thomas Browne) and I wanted to provide a few points of perspective, on my interest in BQN on the Beam, some of which I have already provided on Matrix. I provide this not because of me, per se, but because I believe that a non-trivial subset of data scientists will have similar perspectives, so my background may be useful. The below summarises some of my points in my chat with @Gander (Rowan Cannaday) two days ago (Friday 29 Dec 2023).

Vegabook

@Jack Right, then I think DejaVu Sans + BQN386 will be best as DejaVu Sans will at least render APL acceptably when people forget to markdown their code, and BQN386 (being almost identical to APL385) will look most familiar, since the site is mainly Dyalog focused, and APL385 is Dyalog's go-to font.

Things to note about DejaVu BQN Sans Mono (hosted [here](https://github.com/mlochbaum/BQN/blob/master/docs/DejaVuBQNSansMono.ttf)) are that it has no bold or italic version, and it changes some APL characters to align better. So it's not entirely a drop-in replacement.

Regarding fonts, can we add options to support plain monospace/serif/sans-serif, and either [BQN386](https://github.com/dzaima/BQN386) or [Fairfax HD](http://www.kreativekorp.com/software/fonts/fairfaxhd.shtml)? In my wild optimism I'm hoping some people will use BQN here, and in that case they'll want an option that supports BQN characters like `𝕩⎉⥊`.