Command | Behavioural Design Pattern | Intent, Examples, UML, Code & Trade-Offs

Master the Command Pattern: Empower Your Applications with Reversible Commands!In this video, we explore the Command Pattern, a behavioral design pattern that encapsulates requests as objects, allowing you to parameterize objects with operations, delay execution, and support undoable actions.

What you'll learn:
Intent: Understand how the Command Pattern decouples the sender and receiver, making actions reusable and reversible.
Real-World Use Cases:
Text-Based Editors: Commands like bold, italic, and underline in tools like Word, Excel, PowerPoint, and OneNote.
Visualizing with Diagrams:
Sequence Diagram: Showcasing the interaction between invoker, command, and receiver.
Class Diagram: Highlighting the key components like Invoker, Command, and Receiver.
Code Walkthrough: Step-by-step implementation of a Text Editor with commands for Bold, Italic, and Underlined text formatting, including undo functionality.
Trade-Offs:
Strengths: Promotes extensibility, supports undo/redo, and simplifies the execution queue.
Weaknesses: Can increase the complexity with a large number of command classes.

Resources:

#CommandPattern #DesignPatterns #LowLevelDesign #SoftwareEngineering #OOD #UdayKiranTech

Video Chapters:
00:00 intro
00:18 intent and examples
06:45 UML diagrams
11:58 code
16:32 trade offs
17:50 summary and thank you