What are advanced collections in JavaScript?

What are advanced collections in JavaScript?

Advanced collections in JavaScript refer to data structures like Maps, Sets, WeakMaps, and WeakSets that offer enhanced functionality.

Can you explain the difference between a Map and an Object?

Sure! A Map allows any data type as a key, while an Object only allows strings and symbols. Maps also maintain insertion order.

What are the benefits of using Sets?

Sets store unique values, which means they automatically handle duplicates. They also provide efficient methods for operations like union and intersection.

How do WeakMaps differ from regular Maps?

WeakMaps hold weak references to keys, allowing for garbage collection if there are no other references to the key, preventing memory leaks.

Can you give an example of using a Set in JavaScript?

Certainly! You can create a Set like this: const mySet = new Set([1, 2, 3, 3]); This will store only unique values: 1, 2, and 3.