Ask HN: Whats the smallest code that you looked at and said wow that's so clever

Not a code, but an AI-Like solution for any programmer's problems on windows systems.. ALT+F4.

(But generally, I think the lambda functions of python is kind of clever, short code. Some solutions based on lambda functions let me shiver in respect)

there lots of examples, in many languages, of Dijkstra’s Two Stack calculator. this one is in ?javascript? https://switzerb.github.io/imposter/algorithms/2021/01/12/di... a very elegant piece of code

any self-replicating quine is amazing

BUSINESS CARD RAYTRACER https://fabiensanglard.net/rayTracing_back_of_business_card/

Tupper's Self-Referential Formula https://mathworld.wolfram.com/TuppersSelf-ReferentialFormula...

Duff's Device.

https://en.wikipedia.org/wiki/Duff%27s_device