Rust learning 🦀️

references

• https://github.com/rust-lang/rustlings
• https://doc.rust-lang.org/book/index.html

ch01-01

installation

• curl --proto '=https' --tlsv1.2 https://sh.rustup.rs -sSf | sh
• get a C compiler on macOS xcode-select --install
• rustc --version
• rustup update

ch01-02

Hello, world!

create first Rust code by using rustc directly!

• touch main.rs

  •   fn main() {
    	println!("Hello, world!");
    }

• rustc ./main.rs

• run main then print Hello, world!

println! calls a Rust macro

ch01-03

using Cargo

Cargo is Rust's build system and package manager

cargo new hello_cargo

generates 2 files:

• src/main.rc
• Cargo.toml (short for Tom's Obvious, Minimal Language which is Cargo's configuration format)
• cargo new will also initialize the git repository

building and running a cargo project

• cargo build creates an executable file in target/debug/hello_cargo

  • run the executable ./target/debug/hello_cargo -> print result

• cargo run compile the code and then run the resultant executable all in one command

• cargo check quickly checks your code to make sure it compiles but doesn’t produce an executable

• cargo build --release create an executable in target/release instead of target/debug