"Being able to write APL programs doesn't normally imply that you are able to read APL programs – not even your own!"https://www.cccs.de/wiki/pub/Main/VorTraege/apl_slides.pdf
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I've added an eval button to the website of my programming language!
It's a been a lot of work to lock down appropriately. It still needs some UI polish but it's so nice to be able to try snippets immediately.
https://www.garden-lang.org/
I've been learning some Common Lisp by writing some simple JSON munging programs. I'm sure it's not best practice — I should probably deserialise to CLOS automatically — but it's a nice way to get comfortable with the basics.
It feels weird deliberately ignoring helpers though.
I regularly see the phrase "all Xs are Ys, but not all Ys are Xs" in teaching material. Even material for children!
I have to re-read it every time. I very much prefer "Y is a more general category than X" or "X is a subset of Y".
Do people find this phrasing helpful, or is it poor pedagogy?