Additional Notes
When is `HashSet` the right model?
Track: Java
Topic: Collections
Focus: Set Interface and HashSet
Java: Set Interface and HashSet
Answer
When uniqueness or repeated membership checks matter more than ordering.
A set communicates that duplicates are not meaningful. `HashSet` is a strong default when the code mostly asks 'have we seen this already?' or must prevent duplicates from being stored.
A set communicates that duplicates are not meaningful. `HashSet` is a strong default when the code mostly asks 'have we seen this already?' or must prevent duplicates from being stored.
Topics: Collections Java Set Interface and HashSet