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extension ViewController {

		private func setNotificationForKeyboardAppearance() {
				NotificationCenter.default.addObserver(
						self,
						selector: #selector(self.keyboardWillShow),
						name: UIResponder.keyboardWillShowNotification,
						object: nil)

				NotificationCenter.default.addObserver(

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func syncOnMainThread<T>(execute block: () throws -> T) rethrows -> T {
  
    if Thread.isMainThread {
      return try block()
    }
    return DispatchQueue.main.sync(execute: block)
}

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enum ScreenSize {
		static let width        = UIScreen.main.bounds.size.width
		static let height       = UIScreen.main.bounds.size.height
		static let maxLength    = max(ScreenSize.width, ScreenSize.height)
		static let minLength    = min(ScreenSize.width, ScreenSize.height)
	}
	
	
	enum DeviceTypes {
		static let idiom                    = UIDevice.current.userInterfaceIdiom

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extension String {
    var isValidEmail: Bool {
        let emailFormat = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
        let emailPredicate = NSPredicate(format: "SELF MATCHES %@", emailFormat)
        return emailPredicate.evaluate(with: self)
    }
    
    var isValidPassword: Bool {
        //Regex restricts to 8 character minimum, 1 capital letter, 1 lowercased letter, 1 number
        let passwordFormat = "(?=.*[A-Z])(?=.*[0-9])(?=.*[a-z]).{8,}"

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  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        
        if let navController = window!.rootViewController as? UINavigationController {
            navController.delegate = self
            let appearance2 = UINavigationBarAppearance()
            appearance2.backgroundColor = .systemBlue
            appearance2.titleTextAttributes = [.foregroundColor: UIColor.white]
            appearance2.largeTitleTextAttributes = [.foregroundColor: UIColor.white]
            

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protocol Endpoint {
    var scheme: String { get }
    var host: String { get }
    var path: String { get }
    var method: RequestMethod { get }
    var header: [String: String]? { get }
    var body: [String: String]? { get }
}

extension Endpoint {

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func quickSort(nums: [Int]) -> [Int] {
    if nums.count < 2 {
        return nums
    } else  {
        let pivot = nums[0]
        
        var lessPart: [Int] = []
        var greaterPart: [Int] = []
        
        for i in 1..<nums.count {

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func recursiveSum(_ nums: [Int]) -> Int {
    if nums.count == 0   {
        return 0
    } else {
        return nums[0] + recursiveSum(Array(nums.dropFirst()))
    }
}

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import Foundation

extension Bundle {
    func decode<T: Codable> (_ file: String) -> T {
        guard let url = self.url(forResource: file, withExtension: nil) else {
            fatalError("Failed to locate \(file) in bundle.")
        }

        guard let data = try? Data(contentsOf: url) else {
            fatalError("Failed to load \(file) from bundle.")

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disabled_rules:
- trailing_whitespace
- colon
- comma
- control_statement
- vertical_whitespace
- switch_case_alignment
- opening_brace
- comment_spacing
- trailing_newline