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Yep - added a link to some simple examples in the article (below). Throughout the article there are also a few links to executable versions of the code examples.

https://ngn.codeberg.page/k/#eJxdjssKwjAQRffzFddVFyLFoiiFQD8...

Or you could try J. Another terse array language that uses ASCII symbols.

https://www.jsoftware.com/#/

ngn k : https://codeberg.org/ngn/k

kona : https://github.com/kevinlawler/kona

alto a javascript implementation even with a graphics library : https://github.com/JohnEarnest/ok

edit : assuming you were talking about k and not freq

Ah, look at that ngn k link. They even golf the file names of the source code of the interpreter itself :D

Not golf; that’s the norm. Makes things easier to fit a page without scrolling and looks/feels more like programming in k.

https://code.jsoftware.com/wiki/Essays/Incunabulum

OMG: <https://codeberg.org/ngn/k/src/branch/master/a.c>

My maths notebook from high school looked like that. I'm having flashbacks. (At least in text files you can't cram 4 lines of text into 1.)