[dzaima]

I don't think $ is of worthy note here. It's literally a builtin for cycling data, that's what it does.

All simple arithmetic follows leading axis agreement[1] (so erroring on mismatched length, and mapping over cells for high rank). Don't know much about other builtins, but, unless J does some weird stuff I don't know about (I don't know much of J), it shouldn't be too illogical.

[1] https://aplwiki.com/wiki/Leading_axis_agreement

[klibertp]

> I don't think $

You're right, although cycling instead of erroring out was surprising to me. Another verb I had trouble with is roll/deal: https://code.jsoftware.com/wiki/Vocabulary/query

> it shouldn't be too illogical.

I'm not saying it's illogical. I'm pretty sure there are good reasons behind the design of each word, especially since there are so few. As I mentioned, I suspect it's just a matter of me not getting enough exposure to the various use-cases of many standard words.