Created
June 3, 2014 15:28
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Bang.swift
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| class Card {} | |
| class Customer { | |
| var optionalCard: Card? | |
| var card: Card | |
| init() { | |
| self.card = Card() // required to avoid compiler error (card2 would be nil) | |
| } | |
| } | |
| let john : Customer? = Customer() | |
| let jane : Customer = Customer() | |
| john!.optionalCard = Card() // We need the ! just because john is Optional | |
| if let someJohn = john { | |
| someJohn.card = Card() | |
| } | |
| jane.optionalCard = Card() | |
| jane.card = Card() |
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If L10 would not have the
?the whole example wouldn't need a!.