80: “Lists and loops”, with special guest Nick Lockwood
Swift by Sundell
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Swift - Copy on Write Semantics for Data Structures
Swift's protocol extensions are again, a really nice solution to the problem that other languages have of kind of these fragile base classes. And Swift actually puts functionality on protocols so that you don't have to share an implementation between things. You can build a data structure completely from scratch using a struct, but it can certainly inherit all of this functionality just by behaving like a collection.
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