Equality, Order, and Hashing

This lecture explores the concepts of equality, order, and hashing in the context of collections in computer science. It delves into the importance of defining equality in collections, the challenges with default equality methods, and the necessity of redefining equality for immutable classes. Additionally, it discusses how the notions of order and hashing play a crucial role in optimizing operations like membership testing in collections, highlighting the significance of these concepts beyond simple equality comparisons.