Compare MDN's entry for the `map` method
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...
With Rust's
https://doc.rust-lang.org/std/iter/struct.Map.html
I find MDN to be a bit clearer, and they benefit from the in-browser runtime. All the extra detail in the Rust docs (blanket traits etc) were quite intimidating and distracting when I first started learning it.