Rust stdlib code is quite high quality although not particularly dense due to large amount of comments. Start from the docs, and click any source link: https://

Rust stdlib code is quite high quality although not particularly dense due to large amount of comments. Start from the docs, and click any source link: https://doc.rust-lang.org/std/vec/struct.Vec.html https://doc.rust-lang.org/std/vec/struct.Vec.html Sqlite is supposedly high quality C code: https://github.com/smparkes/sqlite https://github.com/smparkes/sqlite For videos of someone (Casey Muratori) writing video game code and debugging it, Handmade Hero: https://handmadehero.org/ https://handmadehero.org/ A blog post about how to write code by the same author: https://caseymuratori.com/blog_0015 https://caseymuratori.com/blog_0015 For how to implement a fairly advanced type system, Typing Haskell in Haskell: https://gist.github.com/chrisdone/0075a16b32bfd4f62b7b https://gist.github.com/chrisdone/0075a16b32bfd4f62b7b But, honestly, you're probably better off writing code yourself and learning by doing.