What are the features of std::unordered_set in C++11?

What are the features of std::unordered_set in C++11?

std::unordered_set in C++11 is a hash-based container that stores unique elements. It offers average constant time complexity for insertions, deletions, and lookups.

How does it differ from std::set?

Unlike std::set, which is ordered and implemented as a balanced tree, std::unordered_set does not maintain any order and uses a hash table for storage.

Can I store custom objects in std::unordered_set?

Yes, you can store custom objects in std::unordered_set, but you need to provide a hash function and an equality operator for your custom type.

What are the advantages of using std::unordered_set?

The main advantages are faster average time complexity for operations and the ability to handle large datasets efficiently due to its hash table implementation.