C++: std::list vs std::deque

What are the main differences between std::list and std::deque in C++?

std::list is a doubly linked list, while std::deque is a double-ended queue. std::list allows for efficient insertions and deletions, but accessing elements is slower. std::deque allows for fast insertions and deletions at both ends and provides better random access.

When should I use std::list over std::deque?

Use std::list when you need frequent insertions and deletions in the middle of the container and don't require random access. It's ideal for scenarios where memory overhead is less of a concern.

Are there any performance considerations I should be aware of?

Yes, std::list has a higher memory overhead due to node allocation, while std::deque may have better cache performance due to its contiguous memory allocation for elements. Consider your use case when choosing.

Can you give an example of when to use std::deque?

Certainly! Use std::deque when you need a dynamic array that allows fast insertions and deletions at both ends, like implementing a sliding window algorithm.