Deque vs Array in JavaScript

What are the main differences between a deque and an array in JavaScript?

A deque (double-ended queue) allows insertion and deletion from both ends, while an array only allows operations at one end.

When should I use a deque instead of an array?

Use a deque when you need efficient insertions and deletions at both ends, like in certain algorithms or data structures.

Can you give me an example of how to implement a deque in JavaScript?

Sure! You can use an array and implement methods to add/remove elements from both ends, or use a library like 'collections.js'.

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

Deques generally offer O(1) time complexity for insertions and deletions at both ends, while arrays can be O(n) for these operations.