The memento design pattern is useful for applications that want to support a revertable state. In our example, we used a stack of states; however, this is not necessary—some applications might need only the last operation to be saved.
What it is good for
Get Scala Design Patterns - Second Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
