VecDeque::push_back

pub fn push_back(T v)

use collections::deque::{VecDeque};

Adds v at the back.

Called on a VecDeque value as value.push_back(…).

Parameters#

Contracts#

Checked according to --contracts (see Contracts).

ensures self.len == old(self.len) + 1

Examples#

use collections::deque::{VecDeque};
use tests::assert;
let q: VecDeque<int> = VecDeque::new();
q.push_back(1);
q.push_back(2);
assert!((q.peek_back() ?? 0) == 2);

See also#

• VecDeque: A double-ended queue: constant-time push and pop at both ends.
• VecDeque::with_capacity: Empty deque with ring capacity rounded up to the next power of two (min 8).
• VecDeque::new: Empty deque with default capacity 8.
• VecDeque::size: Returns the number of values.
• VecDeque::is_empty: Returns true when the deque has no values.
• VecDeque::capacity: Returns how many values fit before the ring buffer grows.
• VecDeque::push_front: Adds v at the front.
• VecDeque::peek_front: Returns the front value without removing it, or None when the deque is empty.