Hands-On: Rust for Intermediate Engineers

Modeling state and handling errors correctly are fundamental to writing idiomatic Rust, and struggling with them is one of the fastest ways to end up fighting the compiler. This course focuses on the core constructs you need to build and structure real applications. You will start by defining a struct, reading and changing its fields, managing structs that own a String, and returning and printing them with Debug. From there, you will attach behavior to your data, learning exactly when to read methods with &self and when to change methods with &mut self. We will cover associated functions using Self, as well as how to automatically implement common traits by deriving Clone, Copy, and PartialEq. Next, the course explores Rust’s enum system. You will build an enum of fixed choices, variants that carry values, and variants with named fields. You will learn how to handle these types using exhaustive matching with the _ wildcard and or-patterns, alongside methods on an enum and if let for the one case you care about.

Once your data is modeled, you need to handle absence and failure safely. You will work extensively with Option, representing missing data with Some and None, matching on an Option, and managing optional fields in a struct. We will look at safely extracting values using unwrap_or, is_some, and is_none, and examine exactly what unwrap does on None. You will then handle operations that can fail using Result, matching on Ok and Err, defining an error enum as the error type, and propagating failures cleanly using the ? operator. Finally, you will put it all together by managing a Vec of structs. You will update records in a Vec through &mut and validate raw values into a struct, finishing with a capstone project where you apply commands to a state struct.