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.

To gain a better understanding, let's apply these methods:

JavaScript uses a Hash Table to implement Maps. This table ensures the Map's size adjusts based on the stored data, optimizing memory usage.

The time complexity of get, set, has, and delete operations in Maps is O(1). This signifies that they execute instantly, regardless of the Map's size.

Imagine running a store with thousands of items. A Map lets you quickly handle any item!

Excellent work! You've now learned about JavaScript Maps. Use what you've learned in your practice exercises. Keep exploring Maps and stay curious!