C++ Deque vs Vector: Which One to Use?

What are the main differences between a deque and a vector in C++?

The main differences are in their memory allocation and performance. Vectors are contiguous in memory, while deques are not.

When should I use a deque instead of a vector?

Use a deque when you need efficient insertions and deletions at both ends, while vectors are better for random access.

Are there any performance trade-offs I should be aware of?

Yes, vectors have better cache performance due to contiguous memory, while deques may have overhead due to their structure.

Can you give an example of when to choose one over the other?

Sure! If you're implementing a queue, a deque is ideal. For a dynamic array where you need fast access, choose a vector.