Using Sequence-Like Features of Deque

00:00 Since deques are mutable sequences, they implement almost all the methods and operations that are common to sequences and mutable sequences.

00:09 So far in the course, you’ve learned about some of these methods and operations, such as .insert(), indexing, membership tests, and others. Now, you’ll see a few other examples.

00:20 You can use the plus operator to return a new deque that’s a concatenation of two existing deques. The multiplication operator returns a new deque equivalent to repeating the original deque as many times as you specify. So, let’s review the sequence that we originally had, and you can use .index() to get the position of a value in the deque.

00:46 .count() returns the number of times a value appears in the target deque,

00:52 and you can also reverse the elements of the deque in place.

00:58 You can use .clear() to remove all elements from a deque, so now it’s an empty deque. In the next lesson, you’ll explore a practical use case for deque by using it to keep track of a page history.

01:11 See you there.