What are some use cases for deques in C++?

What are some use cases for deques in C++?

Deques, or double-ended queues, are useful for scenarios where you need fast insertions and deletions from both ends. Common use cases include implementing queues, stacks, and buffers.

Can you give me an example of using a deque as a queue?

Sure! You can use a deque to implement a queue by using the push_back method to enqueue and pop_front to dequeue. This allows efficient operations at both ends.

What about using a deque as a stack?

You can use a deque as a stack by using push_back to add elements and pop_back to remove them. This provides LIFO (Last In, First Out) behavior.

Are there any performance benefits of using a deque over a vector?

Yes, deques provide constant time complexity for insertions and deletions at both ends, while vectors may require shifting elements, leading to potential performance hits.

What libraries in C++ support deques?

The Standard Template Library (STL) in C++ provides the deque class, which is part of the <deque> header. It's widely used and well-supported.