Skill Topic · Cinematic

📘 Angular — Observables & RxJS

Async data streams master karo — Angular ka backbone! Jaise ek nadi (river) me paani continuously…

Overview

📘 Angular — Observables & RxJS — Quick Facts

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"next(value)": S1["👀 Subscriber A"]

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O -->: "next(value)"

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O -->: "error(err)"

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O -->: "complete()"

Topic 1

📌 1. Observable Kya Hai?

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Channel data (videos) produce…

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Subscribe karo tabhi videos milein…

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Unsubscribe karo to notifications…

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Multiple subscribers possible = ek…

Topic 2

📌 2. Creating Observables

💡 `typescript import { Observable, of, from, interval, timer, fromEvent } from 'rxjs'; //…

Topic 3

📌 3. Subscribe & Unsubscribe

🎯 🎯 Analogy — Magazine Subscription Magazine subscribe karo → har month issue milta hai.…

Topic 4

📌 4. RxJS Operators — Transformation

⭐ 🎯 Analogy — Factory Assembly Line Operators = factory ki assembly line. Raw material…

Topic 5

📌 5. RxJS Operators — Combination

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merge = Multiple chefs cook at…

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concat = Ek chef ke baad doosra…

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forkJoin = Sab dishes ready hone…

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combineLatest = Latest combo plate…

Topic 6

📌 6. Higher-Order Mapping Operators

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switchMap = "Naya order aaya?…

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mergeMap = "Sab orders ek saath…

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concatMap = "Queue me lagao — ek…

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exhaustMap = "Abhi busy hoon —…

Topic 7

📌 7. Subjects — Observable + Observer Dono

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Group admin messages bhejta hai =…

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Group members messages receive…

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BehaviorSubject = Nayi join hone…

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ReplaySubject = Last N messages ka…

Topic 8

📌 8. Error & Completion Operators

🚀 `typescript import { catchError, retry, throwError, EMPTY, finalize, timeout } from…

Topic 9

📌 9. Utility Operators

📚 `typescript import { debounceTime, throttleTime, distinctUntilChanged, delay, startWith,…

Topic 10

📌 10. Angular Me Practical RxJS Patterns

💡 Shared State Service `typescript // ═══ services/auth.service.ts ═══ @Injectable({…

Topic 11

📌 11. Common Mistakes — Beginners Ye Galtiyan Karte Hain

🎯 | # | ❌ Mistake | ✅ Solution | |---|-----------|------------| | 1 | Subscribe kiya lekin…

Topic 12

✅ Summary

⭐ 📌 Yaad Rakho: - Observable = data stream; subscribe() se values receive karo -…

Topic 13

🧪 Khud Try Karo!

🔑 Exercise 1: Counter with Operators ` 1. interval(1000) se counter banao (0, 1, 2, ...) 2.…

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quick Quiz

Quiz — Question 1

📘 Angular — Observables & RxJS ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

📘 Angular — Observables & RxJS ka 'O -->' kya hai?

Complete! 🎉

📘 Angular — Observables & RxJS Complete!

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