Today, we're learning about Map in JavaScript. A Map stores data as key-value pairs. We'll recall how to create Maps, implement them, and delve into the details of their memory management.

Maps are versatile data structures in JavaScript. They store key-value pairs and accept any data type as a key — even objects and functions!

Here is how we create an empty Map:

Here, myMap is a new JavaScript Map, eagerly awaiting to store your keys and values.

Maps provide some essential built-in methods:

• set(key, value): Stores a key-value pair.
• get(key): Retrieves the value of a key.
• has(key): Checks if a key exists and returns true or false.
• delete(key): Erases a key-value pair.
• size: Returns the count of key-value pairs.