In this video, Gaurav Sen talks about the importance of creating a class diagram before coding, especially for larger projects, because it is easier to make changes in a diagram than in the code base.
He shows an example of breaking down a rate limiter software client and server into classes. He discusses the necessary behaviors and states of the client, including algorithms and a flexible system to handle success and failure callback functions.
Finally, he discusses the concept of generics in Java and how it can help avoid dirty code when returning objects in functions.