rust-dev

# Rust Development - Day 1 A practical foundation for writing Rust apps well from the first commit. Not a textbook. Focuses on the differences from other languages, the day-1 decisions that shape everything else, and the small set of crates that cover most real apps. ## When to Use - Starting a new Rust project (CLI, service, library) - Coming to Rust from Python, JavaScript, Go, Java/C#, or C++ - Choosing between owned/borrowed types, smart pointers, trait objects vs generics - Picking error handling strategy (`anyhow` vs `thiserror`) - Deciding which crates to reach for - Configuring a minimal but opinionated `Cargo.toml`, clippy, and rustfmt ## Day-1 Setup ```bash # 1. Install the toolchain (rustup is the toolchain manager) curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh # 2. Confirm components (rustfmt and clippy ship with stable, rust-src enables IDE features) rustup component add rustfmt clippy rust-src # 3. Create a project cargo new my-app # binary (src/main.rs) cargo new --lib my-lib # library (src/lib.rs) # 4. The dev loop (memorize these four) cargo check # fast type-check, no codegen cargo run # build and run (binary) cargo test # build and run tests (incl. doctests) cargo clippy # lint (run before pushing) cargo fmt # format # 5. Manage dependencies without editing Cargo.toml by hand cargo add tokio --features full cargo remove tokio cargo update # recompute Cargo.lock within existing sem...