efremidze

protocol LoginProvider {
  func login()
}

class EmailLoginProvider: LoginProvider {
  var email: String
  var password: String
  init(email: String, password: String) {
    self.email = email
    self.password = password

efremidze

func propertyNames(forClass: AnyClass) -> [String] {
    var count = UInt32()
    let properties = class_copyPropertyList(forClass, &count)
    let names: [String] = (0..<Int(count)).flatMap { i in
        let property: objc_property_t = properties[i]
        guard let name = NSString(UTF8String: property_getName(property)) as? String else {
            debugPrint("Couldn't unwrap property name for \(property)")
            return nil
        }
        return name

efremidze

// MARK: - CABasicAnimation
extension CABasicAnimation {
    
    /// Creates a new animation object with its `keyPath` property set to `path` and current `keyPath` value set to `fromValue`.
    convenience init(keyPath path: String, layer: CALayer) {
        self.init(keyPath: path)
        self.fromValue = layer.presentation()?.value(forKeyPath: path)
    }
    
}

efremidze

extension UIScrollViewDelegate {
    
    func scrollViewDidEndScrolling(scrollView: UIScrollView) {}
    
    func scrollViewDidEndDecelerating(scrollView: UIScrollView) {
        scrollViewDidEndScrolling(scrollView)
    }
    
    func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool) {
        if !decelerate {

efremidze

var UUID: String? {
    return keychain[Constants.Keychain.UUID.description] ?? {
        let string = UIDevice.currentDevice().identifierForVendor?.UUIDString
        keychain[Constants.Keychain.UUID.description] = string
        return string
    }()
}

efremidze

extension Optional {
    
    func unwrap(_ f: (Wrapped) -> Void) {
        _ = self.map(f)
    }
    
}

// usage:
// let username: String?

efremidze

extension Array where Element: _ArrayType, Element.Generator.Element: AnyObject? {
    
    func flatten() {
        return flatMap { $0.flatMap { $0 } }
    }
    
}

efremidze

@warn_unused_result
func Init<T>(value: T, @noescape block: (object: T) -> Void) -> T {
    block(object: value)
    return value
}

efremidze

extension UInt32 {
    
    static func random(_ range: Range<UInt32>) -> UInt32 {
        return arc4random_uniform(range.upperBound - range.lowerBound) + range.lowerBound
    }
    
}

extension CGFloat {
    

efremidze

extension UIView {
    
    func superview<T>(of type: T.Type) -> T? {
        return superview as? T ?? superview.flatMap { $0.superview(of: T.self) }
    }
    
}