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Skill Topic ยท Cinematic

๐Ÿ“˜ Kotlin โ€” Object & Companion

Singleton, factory methods, aur static-like behavior โ€” object keyword se sab! ๐Ÿญ

Overview
๐ŸŒŸ

๐Ÿ“˜ Kotlin โ€” Object & Companion โ€” Quick Facts

๐Ÿ“Œ

Headers: $headers: Body: $body"

Topic 1
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

๐Ÿ“Œ 1. Object Declaration (Singleton)

๐Ÿ“š `kotlin // โ•โ•โ• object = Singleton โ€” bus ek instance, guaranteed! โ•โ•โ• objectโ€ฆ
Topic 2
๐Ÿ’ก ๐Ÿ“Š ๐Ÿ”ฌ

๐Ÿ“Œ 2. Object Expression (Anonymous Object)

๐Ÿ’ก `kotlin interface EventListener { fun onClick(id: String) fun onHover(id: String) } funโ€ฆ
Topic 3
๐Ÿ”’

๐Ÿ“Œ 3. Companion Object

๐ŸŽฏ `kotlin class User private constructor( val id: Int, val name: String, val email: Stringโ€ฆ
Topic 4
โญ

๐Ÿ“Œ 4. Named Companion Object

โญ `kotlin class ApiClient { // โ•โ•โ• Named companion object โ•โ•โ• companion object Factory {โ€ฆ
Topic 5
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

๐Ÿ“Œ 5. Companion Object with Interface

๐Ÿ”‘ `kotlin interface JsonFactory<T> { fun fromJson(json: String): T } data class Product(valโ€ฆ
Topic 6
โœจ ๐Ÿ“Š ๐Ÿ”ฌ

๐Ÿ“Œ 6. Companion Object Extensions

โœจ `kotlin class Config(val settings: Map<String, String>) { companion object } // โ•โ•โ•โ€ฆ
Topic 7
โœจ

๐Ÿ“Œ 7. Object vs Companion โ€” Comparison

๐ŸŒŸ ` โ•”โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•ฆโ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•ฆโ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•— โ•‘ Feature โ•‘โ€ฆ
Topic 8
๐Ÿ“ฅ โš™๏ธ ๐Ÿ”ฌ ๐Ÿ’ก

๐Ÿ“Œ 8. Patterns & Best Practices

๐Ÿš€ `kotlin // โ•โ•โ• Pattern 1: Registry / Manager โ•โ•โ• object EventBus { private val listenersโ€ฆ
Topic 9
๐Ÿ“ฅ ๐Ÿ“ฅ ๐Ÿง  ๐Ÿ”ฌ ๐Ÿ’ก ๐ŸŽฏ

โœ… Summary

๐Ÿ“š KEY POINTS: - object: singleton โ€” ek hi instance, class + instance ek saath - objectโ€ฆ
Quick Quiz
๐Ÿง  QUIZ TIME

Quiz โ€” Question 1

๐Ÿ“˜ Kotlin โ€” Object & Companion ka sabse sahi definition kya hai?

Complete! ๐ŸŽ‰
COMPLETE

๐Ÿ“˜ Kotlin โ€” Object & Companion Complete!

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๐Ÿ“˜ Kotlin โ€” Object & Companion Complete

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