Skill Topic · Cinematic

📘 Kotlin — Extensions & Delegates

Existing classes ko modify bina extend karo + boilerplate delegates se hatao! 🔧

Topic 1

📌 1. Extension Functions

📚 `kotlin // ═══ String me apna method add karo — class modify kiye bina! ═══ fun…

Topic 2

💡 `kotlin // ═══ Int extensions ═══ fun Int.isEven(): Boolean = this % 2 == 0 fun…

Topic 3

🎯 `kotlin // ═══ Extension property — backing field NAHI hota ═══ val String.lastChar: Char…

Topic 4

⭐ `kotlin class MyClass { fun String.double() = "$this$this" // Member extension fun demo()…

Topic 5

🔑 `kotlin class HeavyResource { // ═══ lazy — pehli baar access pe initialize, phir cached…

Topic 6

✨ `kotlin import kotlin.properties.Delegates class UserSettings { // ═══ observable —…

Topic 7

🌟 `kotlin import kotlin.reflect.KProperty // ═══ Custom delegate class ═══ class Trimmed {…

Topic 8

🚀 `kotlin // ═══ Map se properties delegate karo ═══ class UserFromMap(map: Map<String,…

Topic 9

📚 `kotlin // ═══ Interface implementation delegate karo ═══ interface Logger { fun…

Topic 10

💡 KEY POINTS: - Extension function: fun Type.name() — class modify bina method add karo -…

Quick Quiz

📘 Kotlin — Extensions & Delegates ka sabse sahi definition kya hai?

Complete! 🎉

Aliens School · HIEN · Cinematic Knowledge

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