Constants no longer require immediate initialization 관련

HACKING WITH SWIFT

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What's new in Swift?

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Constants no longer require immediate initialization | Changes in Swift 1.2

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Constants no longer require immediate initialization

Available from Swift 1.2

Constants may be set only once, but Swift 1.2 allows us to create constants without initializing them immediately. For example:

let username: String

if authenticated {
    username = fetchUsername()
} else {
    username = "Anonymous"
}

Other changes in Swift 1.2…

The zip() function joins two sequences | Changes in Swift 1.2

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The zip() function joins two sequences

The flatMap() method transforms optionals and arrays | Changes in Swift 1.2

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The flatMap() method transforms optionals and arrays

Closures can now be marked @noescape | Changes in Swift 1.2

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Closures can now be marked @noescape

Classes can now have static methods and properties | Changes in Swift 1.2

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Classes can now have static methods and properties

A new Set data structure | Changes in Swift 1.2

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A new Set data structure

Implicit bridging has been reduced | Changes in Swift 1.2

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Implicit bridging has been reduced

Multiple if let bindings | Changes in Swift 1.2

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Multiple if let bindings

Typecasting now includes as! | Changes in Swift 1.2

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Typecasting now includes as!