Final answer:
The Command Pattern and Memento Pattern are two solutions for handling undo/redo functionality with destructive commands by maintaining a stack of commands or saving the object's state.
Step-by-step explanation:
When dealing with destructive commands in programming or software design, ensuring that users have the ability to undo and redo actions is crucial for a positive user experience. Two common solutions for handling undo and redo functionalities involve:
- Command Pattern: This approach encapsulates each action as an object with an execute method for performing the command and an undo method to reverse it. You can maintain a history stack of commands that have been executed. For redo functionality, you can maintain a separate stack for commands that have been undone, or you can move commands from the undo stack back to the redo stack.
- Memento Pattern: This approach involves saving the state of an object before a destructive action. To undo the action, you can restore the object to its previous state using the saved state. Redo functionality can be achieved by saving the new states as they are created and stepping forward through these states.
Both of these patterns allow for effective management of undo/redo functionality and can be adapted to various programming languages and software applications.