Set is a collection of unique elements — duplicates are not allowed. Attempting to add an existing element is silently ignored (add returns false). HashSet is the fastest Set implementation, using a hash table for O(1) operations.
How a Hash Table Works
Content is available with subscription.
Get full access to all courses on the platform for one year with a single payment.
▼
Unlike other platforms that charge per course, here you get everything for one price, and after one year of use there will be no automatic charge for the following year.