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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
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How to check object is nil or not in swift? - Stack Overflow This question is similar to: Swift: Testing optionals for nil If you believe it’s different, please edit the question, make it clear how it’s different and or how the answers on that question are not helpful for your problem