Many years ago I enjoyed Code Reading[0] which is a whole book which basically just discusses snippets from open source codebases.
It might be a bit old (I honestly don't remember the specifics) but most of the code was already "mature" at the time so I think it would still be valid.
It might be a bit old (I honestly don't remember the specifics) but most of the code was already "mature" at the time so I think it would still be valid.
[0] https://en.wikipedia.org/wiki/Code_Reading