This is wonderful: APL is there! And a visual APL keyboard too.

It's missing Nial I think.

no uiua :(

Array languages are such a mind twist and so fun. I dabbled in J at one point, and I love explaining

+/%#

to people. But the real expressive power comes when you start to get into tacit expressions yourself, understand function exponents, and "get" under.

Hmmm... maybe I need a refresher...

MATLAB is an array language.

This is cool. Wish there was more examples for jtye/k so I would have a better chance of learning to use it.

Also missing Uiua.

Is this written by Arthur Whitney himself?

APL and K are still pretty daunting, but I've recently been dabbling in Lil[1], which is something like a cross between K and Lua. I can fall back on regular procedural code when I need to, but I appreciate being able to do things like:

    127 * sin (range sample_rate)*2*pi*freq_hz/sample_rate

This produces one second audio-clip of a "freq_hz" sine-wave, at the given sample-rate. The "range sample_rate" produces a list of integers from 0 to sample_rate, and all the other multiplications and divisions vectorise to apply to every item in the list. Even the "sin" operator transparently works on a list.

It also took me a little while to get used to the operator precedence (always right-to-left, no matter what), but it does indeed make expressions (and the compiler) simpler. The other thing that impresses me is being able to say:

    maximum:if x > y x else y end

...without grouping symbols around the condition or the statements. Well, I guess "end" is kind of a grouping symbol, but the language feels very clean and concise and fluent.

[1]: https://beyondloom.com/decker/lil.html

  # python
  [127 * sin(x * tau * freq / samplerate) for x in range(samplerate)]

    foo(x)

    [foo(x) for x in somelist]

  # python
  from numpy import sin, arange, pi
  127 * sin(arange(samplerate) * 2 * pi * freq / samplerate)

R is also an array language, but a non-iversonian one. Another good ressource for array languages is https://aplwiki.com/.

r/apljk on reddit is also active.

At one time I briefly spent a bunch of time learning kdb/q. I remember one particular day when I wrote a non-trivial program and it worked first time. I was so shocked I thought I must have suffered some kind of brain aneurism or something.

Array languages: where your first working program feels like a happy accident.