Rust 1.39.0

# Vectors

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

> Vectors store more than one value in a single data structure that puts all the values next to each other in memory. Vectors can only store values of the same type.

    let v: Vec<i32> = Vec::new();
    let numbers = vec![1, 2, 3];Run

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

- in the current edition: Ch 8.01 — Vectors
- In the first edition: Ch 3.7 — Vectors