Welcome to our Ruby Sets lesson! In Ruby, sets are collections that store unique elements, similar to arrays but without duplicates. Sets are part of the Set class, which offers a variety of methods to manage unique collections efficiently. Throughout this lesson, you'll learn how to create and manipulate sets in Ruby, perform set operations, and understand the performance benefits they provide. Let’s dive in!

To work with sets in Ruby, you’ll need to require the set library. You can create a set using the Set.new method.

When you create a set using Set.new, duplicates in the input array are automatically removed because sets enforce uniqueness. Sets use a hash-based structure under the hood, where each element’s value is hashed. This ensures that duplicates are identified and ignored during initialization.

Ruby’s Set provides methods like add, include?, and delete, making it straightforward to manage collections of unique items.