vec_drain.rs

vec_drain.rs

fn main() {
    let mut numbers = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
    println!("                  0  1 (2  3  4  5]");
    println!("Original vector: {:?}", numbers);
    #[allow(unused_variables)]
    for num in numbers.clone() {
        //print!("{} ", num);
    }
    //println!();
    // We want to drain elements from
    // index 2 (exclusive) to
    // index 5 (inclusive)
    let drained: Vec<_> = numbers.drain(2..5).collect();

    println!("Original vector after drain: {:?}", numbers);
    println!("Drained elements:      {:?}", drained);

    // You can also iterate over the drained elements directly
    //println!("Iterating over the drained elements:");
    #[allow(unused_variables)]
    for num in drained.iter() {
        //println!("Removed: {}", num);
    }
}