Architecture & LLD Preview
Command Pattern
Encapsulate a request as an object, support dynamic parameterization, execution queues, and undo histories.
Command pattern reifies action requests into independent objects implementing execute and undo methods.
Core Design Challenge
"How do we trigger smart home light and fan actions dynamically while supporting a reversible undo queue?"
What You'll Learn:
- ✦Encapsulating requests as standalone objects
- ✦Supporting reversible undo/redo queues with action history
- ✦Scheduling, queueing, and replaying actions dynamically
- ✦Decoupling UI actions from document state updates