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August 29, 2015 14:24
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var costume: String? = "Werewolf" | |
println(costume) // Optional("Werewolf") | |
costume = costume + " dressed as Michael J Fox" // Compiler Error | |
if let something = costume { | |
// The value is not nil, use it with confidence | |
something = something + " dressed as Michael J Fox" | |
println(something) // "Werewolf dressed as Michael J Fox" | |
} else { | |
// The value is nil | |
} |
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