Gio Lodi • 6/30/2016

What is an optional value in Swift

This article delves into Swift's Optional type, clarifying that 'String?' is syntactic sugar for 'Optional<String>', a distinct enum type with 'none' and 'some' cases. It explains why understanding this type is crucial for proper unwrapping and leveraging methods like map, moving beyond a simple view of optionals as just nullable variables.

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#type system #generics #Enum