Method in collections::list · List coil-stdlib

`List::peek_front`

pub fn peek_front() -> Option<T>

Import

use collections::list::{List};

Returns the front value without removing it, or None when the list is empty.

Called on a List value as value.peek_front(…).

Returns#

Option<T>

List: A singly-linked list with constant-time push and pop at the front.
List::new: Creates an empty list.
List::size: Returns the number of values.
List::is_empty: Returns true when the list has no values.
List::push_front: Adds v at the front.
List::push_back: Adds v at the back.
List::pop_front: Removes and returns the front value, or None when the list is empty.
List::pop_back: Removes and returns the back value, or None when the list is empty.