memento

Memento Design Pattern

Video Lecture

Section	Video Links
Memento Pattern
Memento Use Case

Book

Cover	Links
	https://www.amazon.com/dp/B0948BCH24    https://www.amazon.co.uk/dp/B0948BCH24    https://www.amazon.in/dp/B094716FD6    https://www.amazon.de/dp/B0948BCH24    https://www.amazon.fr/dp/B0948BCH24    https://www.amazon.es/dp/B0948BCH24    https://www.amazon.it/dp/B0948BCH24    https://www.amazon.co.jp/dp/B0948BCH24    https://www.amazon.ca/dp/B0948BCH24    https://www.amazon.com.au/dp/B0948BCH24

Overview

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Terminology

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Memento UML Diagram

Output

node ./dist/memento/memento-concept.js
Originator: Set state to 'State #1'
Originator: Set state to 'State #2'
CareTaker: Getting a copy of Originators current state
Originator: Providing Memento of state to caretaker.
Originator: Set state to 'State #3'
CareTaker: Getting a copy of Originators current state
Originator: Providing Memento of state to caretaker.
Originator: Set state to 'State #4'
State #4
CareTaker: Restoring Originators state from Memento
Originator: State after restoring from Memento: 'State #2'
State #2
CareTaker: Restoring Originators state from Memento
Originator: State after restoring from Memento: 'State #3'
State #3

Memento Use Case

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Example UML Diagram

Output

node ./dist/memento/client.js
Score: 200, Level: 0, Location: {"x":0,"y":0,"z":2}
Inventory: ["sword","rifle"]
CareTaker: Game Save
Score: 500, Level: 1, Location: {"x":0,"y":0,"z":13}
Inventory: ["sword","rifle","motorbike"]
CareTaker: Game Save
Score: 600, Level: 2, Location: {"x":0,"y":0,"z":14}
Inventory: ["sword","rifle","motorbike"]
CareTaker: Restoring Characters attributes from Memento
Score: 200, Level: 0, Location: {"x":0,"y":0,"z":2}
Inventory: ["sword","rifle"]

Summary

... Refer to Book or Design Patterns in TypeScript website to read textual content.