Here are the differences between Set and WeakSet objects:
- A Set can store primitive types and object references whereas a WeakSet object can only store object references
- One important features WeakSet objects is that if there is no other reference to an object stored in a WeakSet object then they are garbage-collected
- Lastly, a WeakSet object is not enumerable: that is, you cannot find its size; it also doesn't implement the iterable protocol
Apart from these three differences, WeakSet behaves exactly the same way as Set. Everything else apart from these three differences is same between a Set and WeakSet object.
A WeakSet object is created using the WeakSet constructor. You cannot pass an iterable object as an argument to a WeakSet ...
