What are the differences between a deque and an array?

What are the differences between a deque and an array?

A deque (double-ended queue) allows insertion and deletion from both ends, while an array has fixed size and allows access by index.

Can you give me examples of when to use a deque instead of an array?

Use a deque when you need fast insertions/removals from both ends, like in a task scheduling system. Arrays are better for indexed access.

What are the performance implications of using a deque over an array?

Deques generally have O(1) time complexity for insertions/removals at both ends, while arrays have O(n) for insertions/removals unless at the end.

Are there any programming languages that implement deques natively?

Yes, languages like Python (collections.deque) and C++ (std::deque) provide native support for deques.