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fatal error: unexpectedly found nil while unwrapping an Optional value(When adding to a array)...


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Swift - Compiler warns i haven't unwrapped an optional but then forces me to unwrap using ! rath...


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swift: if-let with parallel assignment...


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Set UIButton Image in Swift - currently unwraps as nil...


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Swift: Checking for the existence of a uitextfield...


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Ignore an optional prefix in expression...


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fetchedResultsController core data fatal error: unexpectedly found nil while unwrapping an Optional ...


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Concatenating an array to another optional values array with the “+=” operator...


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Default values for function parameters where value passed in is nil...


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How do I convert a contained forced value to a contained optional value?...


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Why does this work (not using vs. using optionals)?...


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Using ? (optionals) in Swift variables...


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Error while unwrapping an Optional value after testing it in Swift...


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Swift optional chaining with NSDictionary...


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Swift Optional values out of an NSSet...


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Python - Optional list values - A more pythonic way?...


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mysql REPLACE INTO and optional values IFNULL...


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