Thanks for creating such readable docs! When vectors are introduced in [section 2.12](https://github.com/rust-lang/rust/blob/master/src/doc/trpl/arrays-vectors-and-slices.md), an analogy is made involving slices: > Vectors are to slices what String is to &str. But I don't think slices have been introduced yet; they're introduced later in that section: > A _slice_ is a reference to (or "view" into) an array. Maybe the first quote should compare vectors to arrays, rather than slices?