Ask HN: What are good places for sharing early code?

I saw today that a poster [1] shared early work to r/EntrepreneurRideAlong. What other parts of the internet come to mind for sharing early code? I often write little things that I think are cool, but are far too unpolished for Product Hunt or HN launches. Still, it would be cool to get feedback on them.

[1] https://news.ycombinator.com/item?id=36227470