vialyx

postfix operator ~~~

struct Engine {
    var tank: Float
    var consumption: Float
    var distance: Float
    var consumptionTarget: Float?
    
    static prefix func ~ (engine: Engine) -> Engine {
        return Engine(tank: engine.tank,

vialyx

enum TaskType: String, Codable {
    case unknown
    case activity
}

// MARK: - APIObjectMapping
extension TaskType: APIObjectMapping {
    typealias Object = String
    
    static func with(object: String?) -> TaskType? {

vialyx

protocol APIObjectMapping {
    associatedtype Object
    static func with(object: Object?) -> Self?
}

protocol ClientObjectMapping {
    associatedtype Object
    var object: Object? { get }
}

vialyx

protocol ReusableViewType: class {
    static var defaultReuseIdentifier: String { get }
    static var nib: UINib { get }
}

extension ReusableViewType where Self: UIView {
    
    static var defaultReuseIdentifier: String {
        return NSStringFromClass(self)
    }

vialyx

func someFunction<T: SomeClass, U: SomeProtocol>(someT: T, someU: U) {
    // function body goes here
}

vialyx

extension Buffer {
    
    var isEmpty: Bool {
        return items.isEmpty
    }
    
    var middle: Element? {
        return try? get(index: items.count / 2)
    }
    

vialyx

struct Buffer<Element> {
    
    enum BufferError: Error {
        case outOfBounds
    }
    
    private var items: [Element] = []
    
    mutating func add(_ item: Element) {
        items.append(item)

vialyx

func swapTwo(_ a: inout Int, _ b: inout Int) {
    (a, b) = (b, a)
}

var x = 4
var y = 7

swapTwo(&x, &y)

// What about two string, double, etc. ???

vialyx

let mediaSet: [Media] = [Video(url: "http://[email protected]", thumb: "http://[email protected]"),
                         Video(url: "http://[email protected]", thumb: "http://[email protected]"),
                         Media(url: "http://[email protected]")]

for media in mediaSet {
    // We don't sure about casting result
    if let video = media as? Video {
        print("Video: \(video)")
    }
    

vialyx

class Media {
    var url: String
    
    init(url: String) {
        self.url = url
    }
    
}

class Video: Media {