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DispatchQueue.main.async {
            // Init Drawer
            let appDelegate = UIApplication.shared.delegate as! AppDelegate
            let storyBoard = UIStoryboard.init(name: "Main", bundle: Bundle.main)
            let navVC = storyBoard.instantiateViewController(withIdentifier: "MainController") as! MyTabBarController
            navVC.loggedAlready = true
            // is the main controller for the drawer.
            let drawerVC = storyBoard.instantiateViewController(withIdentifier: "DrawerVC")
            // is the drawer, and the drawer needs a main controller
            appDelegate.drawerController.mainViewController = navVC

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 static func showStandardMessage(reference: UIViewController, title: String, message: String) {
        let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert)
        alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
        alert.view.setNeedsLayout()
        reference.present(alert, animated: true, completion: nil)
    }
    
    static func showStartCancel(reference: UIViewController, title: String, message: String, callback: @escaping (UIAlertAction)->()) {
        // create the alert
        let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert)

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 // REMARK: format date for better display
    func convertDate(date: Date) -> String? {
        let dateFormatterGet = DateFormatter()
        dateFormatterGet.dateFormat = "yyyyMMdd HH:mm:ss"
        let dateString = dateFormatterGet.string(from: date)
            return dateString
    }
    
    // REMARK: server sends dates on JS string format
    func convertJSDate(date: String) -> String? {

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 // REMARK: format date for better display
    func convertDate(date: Date) -> String? {
        let dateFormatterGet = DateFormatter()
        dateFormatterGet.dateFormat = "yyyyMMdd HH:mm:ss"
        let dateString = dateFormatterGet.string(from: date)
            return dateString
    }
    
    // REMARK: server sends dates on JS string format
    func convertJSDate(date: String) -> String? {

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 // REMARK: format date for better display
    func convertDate(date: Date) -> String? {
        let dateFormatterGet = DateFormatter()
        dateFormatterGet.dateFormat = "yyyyMMdd HH:mm:ss"
        let dateString = dateFormatterGet.string(from: date)
            return dateString
    }
    
    // REMARK: server sends dates on JS string format
    func convertJSDate(date: String) -> String? {

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struct Event: Decodable {
        let id: String
        let event: String
        let data: [[Int]]?
        let date: String?
    }
func decode() {
    let json = """
            {
            "id": "b1afdc30-47e7-11e8-8931-33f1426b7c32",

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var customersInLine = ["Alex", "Ewa", "Barry", "Daniella"]
print(customersInLine.remove(at:0)) // Alex

func serve(customer : @autoclosure () -> String) {
    print("serving customer \(customer())")
}

serve(customer: customersInLine.remove(at:0)) // Ewa

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var param = "try change me brother"
func defaultFunc(_ param:String) {
    // param = "I change you" won't compiles
}
defaultFunc(param)
print(param) // try change me brother
func inOutFunc(_ param :inout String) {
    param = "I changed you"
}
inOutFunc(&param) // needs explicit &

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var dictionary = [String: Int]()
var counts = "all for all fun fun funny".components(separatedBy:" ").map({
    var counter = dictionary[$0] ?? 0
    dictionary[$0] = counter + 1
})

print(dictionary)

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struct User {
  let id: Int
  let name: String
  let username: String
  init?(dictionary: Dictionary<String: Any>) {
    guard 
      let id = dictionary[“id”] as? Int,
      let name = dictionary[“name”] as? String,
      let username = dictionary[“username”] as? String
    else {