Observer Pattern Simplified 👀 | Real-World Examples + Best Practices 📚
Article - https://codewitharyan.com/system-desi...
Structured DSA (Basics to Advanced) Practice - https://codewitharyan.com/cwa-sheet/p...
My Uber Interview Experience - • I Survived the Uber Interview Here's What ...
My Coinbase Interview Experience - • What Nobody Tells You About Coinbase Inter...
My American Express Inteview Experience - • What's the Secret to Acing the American Ex...
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..... more coming soon (along with LLD course on Second Channel)
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✨ Timelines✨
0:00 - Introduction: What will you learn?
0:26 - What is the Observer Pattern?
0:36 - Example: YouTube Notification System
1:00 - How do Observers get notified?
2:34 - Why Polling Approach is Inefficient?
2:50 - Problems with Manual Notification Handling
3:30 - Why Use Modular Notification Systems?
4:00 - How to Manage Subscriber Preferences
4:50 - How Open-Closed Principle is Violated
6:55 - Refactor with Observer Interface
7:00 - How to Handle Preferences Modally?
8:00 - Notifying Subscribers Based on Preferences
9:00 - Code Explanation
13:19 - Advantages: Decoupling & Flexibility
13:45 - Real-Life Use Cases: Notifications
14:17 - Conclusion: Scalable, Maintainable Design
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