fn main() {
println!("Hello, Rust!");
}
Rust seems to be a good way to build stable, multi-platform CLI apps, something I’ve had difficulty with using C.
The docs can be found at https://doc.rust-lang.org/book/
Additional Resources
First, generate a project using cargo:
cargo new project-name
Dependencies are managed directly in Cargo.toml. For instance:
[dependencies]
package-name = "0.X"
Running cargo build will install the dependencies.
cargo run will build, then run the project.
As I was sitting at my desktop, I started developing using Visual Studio Code with the Rust extension, which is pleasant enough. Installation took a while, as I had to open/update my dusty Visual Studio instance to install some C++ tools. I’m sure this process would be faster with GNU.
Pointers are a little different than C, with Rust replacing &var with &mut var for mutable variables. References, like most other things, are immutable by default. Nice.
Woo, killer feature: cargo doc --open will build the docs for all of your project’s dependencies and open it in your browser! Useful.
??? What is this?
extern crate rand;
use std::io;
use std::cmp::Ordering;
use rand::Rng;
fn main() {
// ---snip---
println!("You guessed: {}", guess);
match guess.cmp(&secret_number) {
Ordering::Less => println!("Too small!"),
Ordering::Greater => println!("Too big!"),
Ordering::Equal => println!("You win!"),
}
}
Took me a hot minute to wrap my head around this, I’ve never seen anything like match before, but it’s essentially a fancy switch where you can set responses for enumerable variants. Neat.
After reading an article on developers.google.com titled ‘Replacing a hot path in your app’s JavaScript with WebAssembly’, I decided to give wasm-pack a test drive. The aforementioned article gave excellent insight into when and why WASM should be used, so I decided to attempt to port some game logic into WASM… the possibilities!
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