> The only time I’ve used inheritance, has been on toy problems that didn’t need it See https://news.ycombinator.com/item?id=39999644 https://news.ycombinator.

> The only time I’ve used inheritance, has been on toy problems that didn’t need it See https://news.ycombinator.com/item?id=39999644 https://news.ycombinator.com/item?id=39999644 It's very useful when a base class provides an incomplete implementation, and the child class completes the implementation. Sometimes I use it when testing, where the child class alters some behavior in a way that mocking can't do correctly. In C# / Java, inheritance is used for setting up filters for exceptions