Yerazhas

protocol CFMessagesSocket: class {
    var delegate: CFMessagesSocketDelegate? { get set }
    
    func connect()
    func disconnect()
    func sendMessage(message: String)
    func sendMessage(data: Data)
}

Yerazhas

import Foundation

protocol CFMessagesSocket: class {
    var delegate: CFSocketClientDelegate? { get set }
    
    func connect()
    func disconnect()
    func sendMessage(message: String)
    func sendMessage(data: Data)
}

Yerazhas

var str = "Hello, playground"
let url = URL(string: "http://www.example.com?skey=a72bzy321bgf&id=123123")!

extension URL {
    var queryItemsDict: [String: String] {
        var dict = [String: String]()
        guard let urlComponents = URLComponents(url: self, resolvingAgainstBaseURL: false), let queryItems = urlComponents.queryItems else { return dict }
        for queryItem in queryItems {
            dict[queryItem.name] = queryItem.value ?? ""
        }

Yerazhas

enum Zero {}

enum Add<T, U> {
    case inLeft(T)
    case inRight(U)
}

func fromTToAddTZero<T>(t: T) -> Add<T, Zero> {
    return .inLeft(t)

Yerazhas

func request(to route: Route, completion: @escaping (Response?, Error?)) {
    ...
}

enum Result<T> {
    case success(T)
    case failure(Error)
}

func request1(to route: Route, completion: @escaping Result<Response>) {

Yerazhas

//1.
struct WorkDay {
    let numberOfClients: UInt8
    let isWorkingDay: Bool
}

//2.
(Bool, Bool)

//3.

Yerazhas

final class Loan {
    var expiryDate: String?
    var maturityDate: String?
    private var capitalStrategy: CapitalStrategy
    
    private init(capitalStrategy: CapitalStrategy) {
        self.capitalStrategy = capitalStrategy
    }
    
    static func termLoan() -> Loan {

Yerazhas

protocol CapitalStrategy {
    func capital(loan: Loan) -> Double
    func riskFactor() -> Double
}

extension CapitalStrategy {
    func riskFactor() -> Double {
        return 0.0
    }
}

Yerazhas

class Loan {
    var expiryDate: String?
    var maturityDate: String?
    
    func capital() -> Double {
        if expiryDate != nil && maturityDate != nil {
            return 10.0 * duration() * riskFactor()
        }
        if expiryDate != nil && maturityDate == nil {
            if getUnusedPercentage() > 1.0 {

Yerazhas

protocol OutputBuilder {
  func addElement(_ id: String)
}

class XMLBuilder: OutputBuilder {
    func addElement(_ id: String) {}
}

class DOMBuilder: OutputBuilder {
    func addElement(_ id: String) {}