Everything about javascript Maps

Here’s a comprehensive guide on JavaScript Map objects, covering everything from basic usage to advanced features:

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1. What is a JavaScript Map?

A Map is a built-in JavaScript object that holds key-value pairs, where both keys and values can be of any data type. Unlike regular objects, Map retains the order of elements and allows non-string keys.

Key Differences from Objects:

• Map allows any type of key (objects, functions, etc.).
• Maintains insertion order of elements.
• Provides built-in methods for iteration and manipulation.

2. Creating a Map

You can create a Map using the new Map() constructor.

Syntax:

const myMap = new Map();

Example:

const userMap = new Map([
  ['name', 'Alice'],
  ['age', 30],
  ['isAdmin', true]
]);
console.log(userMap); // Map(3) { 'name' => 'Alice', 'age' => 30, 'isAdmin' => true }

3. Basic Map Methods