README.md

🔄 Observer Pattern

📌 What is the Observer Pattern?

The Observer Pattern defines a one-to-many dependency between objects, so when one object (Subject) changes state, all its Observers are notified automatically. 🔔

It promotes loose coupling and follows the Publish-Subscribe model. 📰

🛠️ Key Concepts:

1. Subject (Publisher) → Maintains a list of observers and notifies them.
2. Observers (Subscribers) → React to changes in the subject.
3. Subscription Mechanism → Observers can subscribe/unsubscribe dynamically.

🔥 When to Use?

✅ When multiple objects need to react to state changes in another object.
✅ When you want to implement event-driven systems.
✅ When you need a decoupled notification mechanism.

🎯 Real-World Examples:

• UI Event Listeners: Button click handlers 🎯
• Newsletters: Users subscribe to email updates 📩
• Stock Market: Investors get real-time price updates 📈

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🔗 Example Code: See Implementation