What are some use cases for std::deque in C++?

What are some use cases for std::deque in C++?

std::deque is useful for scenarios where you need efficient insertions and deletions at both ends. For example, implementing a double-ended queue, managing a sliding window of data, or maintaining a buffer for streaming data.

Can you give me an example of a sliding window implementation?

Sure! You can use std::deque to maintain the current window of elements. As you slide the window, you can push_back new elements and pop_front the oldest ones efficiently.

What are the performance benefits of using std::deque over std::vector?

std::deque allows for constant time insertions and deletions at both ends, while std::vector only allows efficient operations at the back. This makes std::deque more suitable for certain use cases.

Are there any drawbacks to using std::deque?

Yes, std::deque may have slightly higher memory overhead compared to std::vector due to its internal structure, and random access can be slower.