The reqwest crate allows you to make HTTP requests in Rust with ease. You can perform GET, POST, and other HTTP methods, handle JSON responses, set headers, and deal with networking errors, all using an ergonomic API similar to popular…
Rust allows you to execute system commands through the std::process::Command API. You can spawn external programs, pass arguments, capture output, and handle errors, all using safe and structured code. One of the first CLI utilities I built in Rust needed…
Rust provides powerful and safe file input/output through the std::fs module. You can read from and write to files, create directories, iterate through folder contents, and handle file system errors, all with strong type safety and predictable behavior. When I…
The clap crate lets you build powerful, user-friendly command-line interfaces in Rust. You can define commands, arguments, flags, and help messages with minimal code. It supports auto-generated help, validation, and even subcommands, all following common CLI conventions. When I built…
Cargo is Rust’s official package manager and build tool. It handles compiling your code, managing dependencies, running tests, generating docs, formatting code, and more. Learning a few advanced Cargo commands and features can make your development process smoother and more…
Rust provides structured logging through the log crate, a lightweight and flexible facade for application-wide logging. By pairing it with implementations like env_logger, you can log messages at different levels (error, warn, info, debug, trace) without needing to write custom…
Integration testing in Rust involves placing test files in a dedicated tests/ directory outside your main code. These tests interact with your library or binary the way an external user would, and they are compiled as separate crates, giving you…
Rust has built-in support for writing unit tests using the #[test] attribute. You can write test functions inside a special tests module, use assertion macros like assert_eq!, and run your tests with cargo test. Testing is part of the standard…
Rust provides powerful combinator methods like map, and_then, unwrap_or, and others to simplify how you work with Option and Result. These methods let you transform values, chain operations, and provide fallbacks, without writing repetitive match blocks. At first, I handled…
Rust encourages explicit error handling using custom error types. You can create your own error enums and implement the standard Error trait to integrate cleanly with Rust’s built-in error handling ecosystem. This helps produce descriptive, meaningful errors that are easy…