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ios - What is self used for in Swift? - Stack Overflow I am new to Swift and I'm wondering what self is used for and why I have seen it in classes and structures but I really don't find them essential nor necessary to even mention them in my code Wh
swift2 - Swift: guard let vs if let - Stack Overflow The Swift Docs on Control Flow explain the idea behind that: Using a guard statement for requirements improves the readability of your code, compared to doing the same check with an if statement