Rust

Cargo, ownership and Result-based error handling.

Cargo

cargo new helloCreate a binary project

cargo checkType-check without producing a final executable

cargo testRun unit and integration tests

cargo fmtFormat the project

let count = 3;Bind an immutable value

let mut count = 3;Allow reassignment or mutation

let name = String::from("Ada");Own a heap-allocated string

let borrowed = &name;Borrow without moving ownership

let values = vec![1, 2, 3];Construct a vector

values.iter().map(|n| n * 2).collect::<Vec<_>>()Transform borrowed elements

Some(42)Represent an optional value

let text = std::fs::read_to_string(path)?;Propagate an error from a function returning a compatible Result