How can linked lists be used in implementing undo functionality in applications?

How can linked lists be used in implementing undo functionality in applications?

Step 1: Understand that a linked list is a data structure made up of nodes, where each node contains data and a reference to the next node.
Step 2: When a user performs an action in an application, create a new node in the linked list to store that action.
Step 3: Each node in the linked list represents a state of the application after an action is performed.
Step 4: To implement undo functionality, keep a pointer to the last node (the most recent action).
Step 5: When the user wants to undo an action, move the pointer back to the previous node in the linked list.
Step 6: Update the application state to reflect the action stored in the previous node.
Step 7: Repeat steps 5 and 6 for multiple undos, moving back through the linked list as needed.

Linked Lists – Data structures that consist of nodes, where each node contains data and a reference to the next node, allowing for dynamic memory allocation and easy insertion/deletion.
Undo Functionality – A feature in applications that allows users to revert to a previous state, often implemented by keeping a history of actions.
Traversal – The process of moving through the linked list to access previous states or actions for the purpose of undoing them.