Classes can now have static methods and properties

Paul Hudson      @twostraws

Swift 1.2 gives us an alias for class final properties: static. While class variables may be overridden in subclasses, static variables may not. For example:

class Student: Person {
    // THIS ISN'T ALLOWED
    override static var count: Int {
        return 150
    }

    // THIS IS ALLOWED
    override class var averageAge: Double {
        return 19.5
    }
}

In this usage, static var is merely an alias for final class var.

Other changes in Swift 1.2…

• The zip() function joins two sequences
• The flatMap() method transforms optionals and arrays
• Closures can now be marked @noescape
• Constants no longer require immediate initialization
• A new Set data structure
• Implicit bridging has been reduced
• Multiple if let bindings
• Typecasting now includes as!

Download all Swift 1.2 changes as a playground Link to Swift 1.2 changes

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