aprilandjan / play-rust

play-rust

A beginner's rust-lang exploration :)

add dependencies

$ cargo add ferris-says

build & run

$ cargo build
$ cargo run

format & prettify

$ cargo fmt
$ cargo fix

Thoughts

1. No need to write parentheses in if for control flow statement

2. Can still use return something; if we want

3. Seems that there's no builtin random generator, had to use crate rand to do that(ref)

4. Seems that is is very hard to create a recursive closure?(ref)

5. The naming conver of a .rs file in rust project is unclear, kebab-case or snake_case?(ref)

6. Need to declare a module first before using, maybe something like #ifndef & #define in c++(ref1, ref2, ref3):

   /// define a module in some file, this in fact do the `copy file content into it` stuff work
   mod utils;
   /// use it in some other file
   use utils;
   use crate::utils;   // from 'project root directory' to find the module
   use super::utils;   // from 'parent directory' to find the module

7. When I want to use a un-exported or indirect type from a dependency, for example, a return type from a new, it is painful. There's no such thing like typescript ReturnType<fn>, had to find where the exact typings are from, and cargo add that exact version of dep(ref1, ref2).

References

• https://www.rust-lang.org/learn/get-started
• https://doc.rust-lang.org/rust-by-example/index.html