vector - How do I get a slice of a Vec<T> in Rust?

Question

I can not find within the documentation of Vec<T> how to retrieve a slice from a specified range.

Is there something like this in the standard library:

let a = vec![1, 2, 3, 4];
let suba = a.subvector(0, 2); // Contains [1, 2];

Answer 1

The documentation for Vec covers this in the section titled "slicing".

You can create a slice of a Vec or array by indexing it with a Range (or RangeInclusive, RangeFrom, RangeTo, RangeToInclusive, or RangeFull), for example:

fn main() {
    let a = vec![1, 2, 3, 4, 5];

    // With a start and an end
    println!("{:?}", &a[1..4]);

    // With a start and an end, inclusive
    println!("{:?}", &a[1..=3]);

    // With just a start
    println!("{:?}", &a[2..]);

    // With just an end
    println!("{:?}", &a[..3]);

    // With just an end, inclusive
    println!("{:?}", &a[..=2]);

    // All elements
    println!("{:?}", &a[..]);
}