“Knowledge is power.” – Francis Bacon

Borrow checker errors in Rust usually mean your code is accessing memory in an unsafe or conflicting way. These errors often look cryptic at first, but they are actually protecting you from common bugs like use-after-free, data races, and memory leaks. When I started learning Rust, the borrow checker felt like a strict teacher that […]

Rust gives you full control over memory without needing a garbage collector. It uses the stack for fixed-size, known-at-compile-time values, and the heap for dynamically sized data. Understanding how Rust chooses where to store data helps you write faster and safer programs. I did not think much about memory layout before Rust. But once I

The regex crate gives Rust full support for regular expressions. It lets you search, validate, extract, and replace text using familiar patterns just like in JavaScript, Python, or other languages. I found myself reaching for regex when parsing logs in a CLI tool. Rust’s approach is different: regexes are compiled ahead of time, which makes

The chrono crate is the standard way to work with dates and times in Rust. It helps you parse, format, and perform arithmetic on dates and times, whether you are building logs, schedulers, or working with timestamps from APIs. I first used chrono when logging events in a CLI tool. I needed readable timestamps, but

In this mini-project, you will build a simple command-line application that fetches real-time weather data from a public API. You will use reqwest to make HTTP requests, serde to parse the JSON response, and clap to accept city names from the terminal. This is the kind of CLI I wish I had built earlier while

The serde crate is the standard for serializing and deserializing data in Rust. It allows you to convert Rust structs to JSON and back using powerful macros. Combined with serde_json, it gives you type-safe and flexible control over reading and writing structured data. I first used serde when building a CLI tool that needed to

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 libraries in other languages. When I first tried to call an API in Rust, I

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 to call an external tool installed on the system. I was worried it would require

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 first started working with files in Rust, I was surprised at how ergonomic and safe

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 my first Rust CLI, I manually used std::env::args, which worked for small tools but quickly