Swift Cheatsheet

cheatsheet.swift

//overriding delegates
    private var delegate: SubclassDelegate?
    override var superclassDelegate: SuperclassDelegate? {
        didSet {
            delegate = superclassDelegate as? SubclassDelegate
        }
    }
    
//Testing types with switch http://stackoverflow.com/a/25724652/3191130
    for thing in things {
    switch thing {
    case 0 as Int:
        println("zero as an Int")
    case 0 as Double:
        println("zero as a Double")
    case let someInt as Int:
        println("an integer value of \(someInt)")
    case let someDouble as Double where someDouble > 0:
        println("a positive double value of \(someDouble)")
    case is Double:
        println("some other double value that I don't want to print")
    case let someString as String:
        println("a string value of \"\(someString)\"")
    case let (x, y) as (Double, Double):
        println("an (x, y) point at \(x), \(y)")
    case let movie as Movie:
        println("a movie called '\(movie.name)', dir. \(movie.director)")
    default:
        println("something else")
    }
}

//Making init unavailable

@available(*, unavailable)
override init(tableView: UITableView) {
    fatalError()
}