rubin55 / rusty-tricks

A bag full of rustiness

rusty-tricks

A collection of various Rust cargo projects, probably from various books and courses, in particular, The Rust Programming Language, Programming Rust, Rust in Action and Programming with Rust.

Each sub-directory is a cargo project. See README.md there for any project specific details.

Some notes

Rust is an expression-based language; almost everything returns something. There are a few exceptions:

• Expressions delimited by ;
• Binding a name to a value with =
• Type declarations, which include fn, struct and enum
• str is usually seen in this form: &str (pronounced string slice). It is a small type that contains a reference to str data and a length
• Creating &str values avoids a memory allocation
• &str is a borrowed type. In practical terms, this means that &str can be thought of as read-only data, whereas String is read-write
• [u8] is slice of raw bytes
• String is to Vec<u8> as str is to [u8]
• Array notation: [f32; 12] is an array of 12 32-bit floating point values
• [u8; 3] is a different type than [u8; 4] - the size of an array matters
• Vec<Vec<(usize, String)>> is a vector of vectors (e.g., Vec<Vec<T>>), where T is a pair of values of type (usize, String). (usize, String) is a tuple
• Vec<T> performs best when you can provide it with a size hint via Vec::with_ capacity()

In Rust, "no value" is represented as (), called "unit".