https://doc.rust-lang.org/book/
https://doc.rust-lang.org/rust-by-example/
https://doc.rust-lang.org/1.30.0/book/first-edition/
https://rust-lang-nursery.github.io/rust-cookbook/intro.html
https://google.github.io/comprehensive-rust/
https://www.programiz.com/rust
https://github.com/BruceEckel/rust-experiments
https://github.com/holgertkey/100-days-of-code/tree/master/Round1
https://learning-rust.github.io/docs/overview/
https://stevedonovan.github.io/rust-gentle-intro
https://dev.to/dandyvica/yarit-yet-another-rust-iterators-tutorial-46dk
https://github.com/rustomax/rust-iterators