Rust 1.29.2

# Structs

There is a new edition of the book and this is an old link.

> A struct is a custom data type that lets us name and package together multiple related values that make up a meaningful group.

    struct User {
        username: String,
        email: String,
        sign_in_count: u64,
        active: bool,
    }Run

Here are the relevant sections in the new and old books:

- In second edition: Ch 5.00 — Structs
- In the first edition: Ch 3.12 — Structs