vialyx

extension CreditCard {
    
    mutating func clear() {
        self.number = ""
        self.date = ""
        self.name = ""
        self.ccv = ""
    }
    
}

vialyx

extension CreditCard {
    
    func info() -> [String: String] {
        return ["number": number,
                "date": date,
                "name": name,
                "ccv": ccv]
    }
    
}

vialyx

struct CreditCard {
    var number: String
    var date: String
    var name: String
    var ccv: String
}

extension CreditCard {
    
    init(number: String, date: String, ccv: String) {

vialyx

protocol ActivityIndicatorProtocol: class {
    var activityIndicator: UIView? { get set }
}

extension ActivityIndicatorProtocol {
    
    var activityIndicator: UIView? {
        get {
            // getter code
            return nil

vialyx

extension NewClassType: Hashable {
  
    // implementation of protocol requirements goes here
  
}

vialyx

extension UIView {
  
    // new functionality to add to SomeType goes here
  
}

vialyx

enum MachingError: Error {
    case NotEnoughtCharacters(count: Int)
}

func throwingFunction(_ source: String) throws -> Bool {
    let minCharacters = 5
    guard source.count >= minCharacters else {
        throw MachingError.NotEnoughtCharacters(count: minCharacters)
    }
    return true

vialyx

func throwingFunction() throws -> Bool {
    return true
}

func regularFunction() -> Bool {
    return true
}

vialyx

enum MachingError: Error {
    case NotEnoughtCharacters(count: Int)
}

enum CollectionError: Error {
    case Empty
}

throw MachingError.NotEnoughtCharacters(count: 1)

vialyx

class TransportStorage {
    
    var output: NSObject!
    
    let database: Any // <----- Constant
    var token: String?
    
    init(database: Any) {
        self.database = database
    }