At first, classes seem very similar to structs because we use them to create new data types with properties and methods. However, they introduce a new, important, and complex feature called inheritance – the ability to make one class build on the foundations of another.
This is a powerful feature, there’s no doubt about it, and there is no way to avoid using classes when you start building real iOS apps. But please remember to keep your code simple: just because a feature exists, it doesn’t mean you need to use it. As Martin Fowler wrote, “any fool can write code that a computer can understand, but good programmers write code that humans can understand.”
Today you have eight one-minute videos to watch, and you’ll meet things like method overrides, final classes, and deinitializers. Once you’ve watched each video and optionally gone through the extra reading, there’s a short test to help make sure you’ve understood what was taught.
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