What are the differences between deque, stack, and queue?

What are the differences between deque, stack, and queue?

A deque (double-ended queue) allows insertion and deletion from both ends, while a stack follows LIFO (Last In, First Out) and a queue follows FIFO (First In, First Out).

Can you give me an example of when to use each one?

Sure! Use a stack for undo functionality in applications, a queue for task scheduling, and a deque for managing a playlist where you can add or remove songs from both ends.

What are the performance differences in terms of time complexity?

All three structures generally offer O(1) time complexity for insertions and deletions. However, the specific implementation can affect performance.

Are there any programming languages that don't support these data structures?

Most modern programming languages support these data structures either natively or through libraries, but some lower-level languages may require manual implementation.