Generic types

- [Instructor] Generic types solve…a similar problem as generic functions.…Generic types can work with any type…and not only with the particular class,…structure, or enumeration.…This is why Swift's built in collection types:…the array, the set, and the dictionary…are implemented as generic collections.…Let's say that we need a wrapper that can hold values…of various types.…Strings, integers, dates, you name it.…I'm going to switch to another playground page…where we have some pre-defined structs.…

With a non-generic approach, we'd end up having a wrapper…for each type.…You've got a StringWrapper for string types,…an IntWrapper for integers,…and a DateWrapper for dates.…The number of dedicated wrapper types increases…with each new type that we need to support.…Besides, with every added type, we duplicate code.…The code becomes a maintenance nightmare.…Actually, even choosing the right wrapper…type is challenging.…Generics are here to help us.…

I'm going to remove these structs.…And let's start implementing our generic solution.…