Memento Pattern
The Memento Pattern is a behavioral design pattern that allows an object to save and restore its previous state without exposing its internal structure. It involves three key components: an originator that creates and uses mementos, a memento that stores the state, and a caretaker that manages the mementos. This pattern is commonly used to implement undo/redo functionality, checkpoints, or snapshots in applications.
Developers should learn the Memento Pattern when building applications that require state management features like undo operations, version control, or rollback mechanisms, such as in text editors, graphic design software, or game save systems. It helps maintain encapsulation by keeping state details private while enabling external control over state restoration, making code more maintainable and flexible for complex state-handling scenarios.