How do I concatenate two slices in Rust?

Question

I want to take the x first and last elements from a vector and concatenate them. I have the following code:

fn main() {
    let v = (0u64 .. 10).collect::

        

Answer 1

You should collect() the results of the take() and extend() them with the collect()ed results of skip():

let mut p1 = v.iter().take(3).collect::>();
let p2 = v.iter().skip(l-3);

p1.extend(p2);

println!("{:?}", p1);

Edit: as Neikos said, you don't even need to collect the result of skip(), since extend() accepts arguments implementing IntoIterator (which Skip does, as it is an Iterator).

Edit 2: your numbers are a bit off, though; in order to get 1, 2, 3, 8, 9, 10 you should declare v as follows:

let v = (1u64 .. 11).collect::>();

Since the Range is left-closed and right-open.