What are JavaScript maps and how do I use them?

What are JavaScript maps and how do I use them?

JavaScript maps are collections of key-value pairs where keys can be of any type. They maintain the insertion order.

Can you show me an example of how to create a map?

Sure! You can create a map using the Map constructor: let myMap = new Map(); Then, you can set values using myMap.set(key, value);.

How do I retrieve a value from a map?

You can retrieve a value using the get method: let value = myMap.get(key); If the key exists, it returns the value; otherwise, it returns undefined.

What are the advantages of using maps over objects?

Maps offer better performance for frequent additions and removals of key-value pairs, and they can use any data type as keys.