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📦 Topic 06: Arrays — "Data Ki Line Lagao!"

"Arrays are one of the most commonly used data structures in any programming language." "Socho ek…

Overview

📦 Topic 06: Arrays — "Data Ki Line Lagao!" — Quick Facts

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[← Topic 05: Functions](./05_JS_Functions.md): 📚 Course Index

Topic 1

📌 Is Topic Me Kya Hai?

📊 Array create karna, access karna, 30+ array methods…

Topic 2

📦 Array Create Karna!

💾 `javascript // METHOD 1: Array Literal (BEST! ✅): let fruits = ["Apple", "Banana",…

Topic 3

🔢 Access & Modify!

🗄️ `javascript let fruits = ["Apple", "Banana", "Mango", "Grapes", "Orange"]; // ACCESS…

Topic 4

➕ Add & Remove Methods!

📈 `javascript let fruits = ["Apple", "Banana"]; // PUSH — End me ADD! (returns new length!)…

Topic 5

✂️ splice() — Swiss Army Knife!

🔍 `javascript // splice(startIndex, deleteCount, ...itemsToAdd) // ORIGINAL array MODIFY…

Topic 6

📋 slice() — Copy A Portion!

📉 `javascript // slice(start, end) — start INCLUSIVE, end EXCLUSIVE! // ORIGINAL array NAHI…

Topic 7

🔍 Search Methods!

🧮 `javascript let fruits = ["Apple", "Banana", "Mango", "Banana", "Kiwi"]; // indexOf —…

Topic 8

🔄 Transform Methods — Array Badlo!

🌐 map() — Har Element Transform! `javascript // map = NEW array with EACH element…

Topic 9

📊 Sort & Reverse!

📊 `javascript // sort() — MUTATES original! Default = alphabetical (string!) let fruits =…

Topic 10

✨ Spread Operator & Destructuring!

💾 `javascript // SPREAD (...) — Array "kholna"! let arr1 = [1, 2, 3]; let arr2 = [4, 5, 6];…

Topic 11

🔗 Other Useful Methods!

🗄️ `javascript // concat() — Join arrays (returns NEW!): let a = [1, 2], b = [3, 4]; let c =…

Topic 12

🔄 Method Chaining!

📈 `javascript // Chain multiple array methods together! // Each method returns something…

Topic 13

🔑 KEY POINTS — Top 10 Takeaways!

🔍 ` ┌─────────────────────────────────────────────────────────┐ │ │ │ 🔑 KEY POINTS │ │ │ │…

Topic 14

💪 Exercises — Khud Karo, Khud Seekho!

📉 Exercise 1: Array Basics 📋 `javascript let students = ["Rahul", "Priya", "Amit", "Neha",…

Topic 15

🗺️ Navigation

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Quick Quiz

Quiz — Question 1

📦 Topic 06: Arrays — "Data Ki Line Lagao!" ka sabse sahi definition kya hai?

Complete! 🎉

📦 Topic 06: Arrays — "Data Ki Line Lagao!" Complete!

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