Data Structures Skill

Quick Reference Card

Object Operations

// Create
const obj = { name: 'Alice', age: 30 };

// Access
obj.name;           // Dot notation
obj['name'];        // Bracket notation
obj?.address?.city; // Optional chaining

// Modify
obj.email = 'a@b.com';       // Add/update
delete obj.age;              // Remove
const { name, ...rest } = obj; // Destructure