#![allow(unused_variables)]
fn main() {
    use std::collections::VecDeque;
    let mut deque = VecDeque::new();
    deque.push_back(0);
    deque.push_back(1);
    deque.push_back(2);
    let expected = [0, 1, 2];
    let (front, back) = deque.as_slices();
    assert_eq!(& expected[..front.len()], front);
    assert_eq!(& expected[front.len()..], back);
    deque.push_front(10);
    deque.push_front(9);
    let expected = [9, 10, 0, 1, 2];
    let (front, back) = deque.as_slices();
    assert_eq!(& expected[..front.len()], front);
    assert_eq!(& expected[front.len()..], back);
}