Build HashSet from a vector in Rust

Question

I want to build a HashSet from a Vec. I\'d like to do this

1. in one line of code,
2. copying the data only once,<

Answer 1

Moving data ownership

let vec: Vec = vec![1, 2, 3, 4];
let hash_set: HashSet = vec.into_iter().collect();

Cloning data

let vec: Vec = vec![1, 2, 3, 4];
let hash_set: HashSet = vec.iter().cloned().collect();