What data structure is best for implementing an undo functionality?

What data structure is best for implementing an undo functionality?

A stack is often the best choice for implementing undo functionality because it follows the Last In, First Out (LIFO) principle.

Can you explain how a stack works in this context?

Sure! When an action is performed, it's pushed onto the stack. When you want to undo, you pop the last action off the stack.

Are there any alternatives to using a stack?

Yes, you could use a queue or a linked list, but stacks are generally more efficient for this purpose.

What about using a command pattern?

The command pattern is a great alternative! It encapsulates actions as objects, allowing for more complex undo functionality.