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import Foundation
import PlaygroundSupport
import UIKit

public protocol Logger {
    func log(_ values: Any...)
}

extension Logger {
    public func log(_ values: Any...) {

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extension Sequence {

    /// Map over properties of sequence elements
    /// ```
    /// let counts = ["Hello", "World!"].map(\.count)
    /// // returns [5, 6]
    /// ```
    ///
    /// - Returns: An array of element properties at the keypath
    @inlinable

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// Property observer unexpectedly firing?

protocol MyProtocol {
    var value: String { get set }
}

class MyClass: MyProtocol {
    var value: String = "Value"
}

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1. The Layer Tree

Core Animation's original name is Layer Kit

Core Animation is a compositing engine; its job is to compose different pieces of visual content on the screen, and to do so as fast as possible. The content in question is divided into individual layers stored in a hierarchy known as the layer tree. This tree forms the underpinning for all of UIKit, and for everything that you see on the screen in an iOS application.

In UIView, tasks such as rendering, layout and animation are all managed by a Core Animation class called CALayer. The only major feature of UIView that isn’t handled by CALayer is user interaction.

There are four hierarchies, each performing a different role:

• view hierarchy
• layer tree

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//
//  PanSelectGestureRecognizer.swift
//
//  Created by Garo Hussenjian on 6/24/15.
//
//

import UIKit
import UIKit.UIGestureRecognizerSubclass

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// SegueInteractor.swift

// SegueIdentifier enumerates just the segue ID strings in the storyboard. VC's don't switch on this...
private enum SegueIdentifier: String {
    case ShowDetail
}

// SegueInteractor binds closures to segues. VC's switch on this instead!
enum SegueInteractor {
    case PrepareShowDetail((EventEntity) -> Void)

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import Foundation

protocol RawEnumerable: RawRepresentable {
    static var first: Self? { get }
}

extension RawEnumerable where RawValue == Int {

    static var first: Self? {
        guard let first = Self(rawValue: 0) else {

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//
//  main.swift
//
//  Created by Garo Hussenjian on 8/20/16.
//  Copyright © 2016 Xapnet, Inc. All rights reserved.
//

import UIKit

extension ProcessInfo {

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//
//  ObjectObserver.swift
//
//  Created by Garo Hussenjian on 2/21/16.
//

import Foundation
import CoreData

struct ObjectObserver<T: NSManagedObject> {