What is the most beautiful / highest quality code you've seen (or written)?

literal shower-thought i had tonight as i was thinking about how at work we all don't like dealing with our helm charts because the syntax and structure ends up looking so ugly and it just feels wrong (not to mention the multiple different approaches of handling kubernetes resources in multiple different pipelines.

i try to see beyond any initial repulsion to weird looking code because i know that it may be super functional. but it got me thinking: what makes code beautiful? what makes code "high quality"? (other than that it results in a working, performant, and robust software program obviously).

so i'm curious -- can you show me the best code you've encountered? it can be a small snippet or it can be a "slice of a library" or an architecture etc. have you written anything yourself that you are super proud of?

The best system I ever worked with looked incredibly simple. Small, clear functions. Lots of "set a few variables, run some if statements." Incredibly unassuming, humble code. But it handled 10s of millions of transactions per day elegantly and correctly. Every weird edge case or subtle concurrency bug or whatever else you could think of had been squeezed out of the system. Everything fit together like LEGO blocks, seamlessly coming together into a comprehensible, functional, performant system. I loved it. After years of accepting mediocre code as the cost of doing business, seeing this thing in a corporate environment inspired me to fall in love with software again and commit to always doing my best to write high quality code.

EDIT: I think what made that code so good is that there was absolutely nothing unnecessary in the whole system. Every variable, every function, every class was absolutely necessary to deliver the required functionality or to ensure some technical constraint was respected. Everything in that system belonged, and nothing didn't.

Pytudes by Peter Norvig: https://github.com/norvig/pytudes

Was it written by one person?

I found the netsurf browser to have a pretty and modular C codebase: https://www.netsurf-browser.org/downloads/source/