iThinker

import Foundation
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

func async<T>(_ executable: @escaping @autoclosure () -> T, _ priority: DispatchQoS.QoSClass = DispatchQoS.QoSClass.default, completion: @escaping (T) -> Void) {
    DispatchQueue.global(qos: priority).async {
        let result = executable()
        DispatchQueue.main.async {

iThinker

import Foundation

class AssociationsStorage {
    
    class Associations {
        
        private var storage: [AnyHashable: Any] = [:]
        
        func setValue(_ value: Any, forKey key: AnyHashable) {

iThinker

//
//  Observable.swift
//  Geotification
//
//  Created by Roman Temchenko on 2016-10-29.
//  Copyright © 2016 Temkos. All rights reserved.
//

import Foundation

iThinker

import Foundation

class ObserverStorage {
    
    static let shared = ObserverStorage()
    
    private var observablesMap: NSMapTable<AnyObject, AnyObject> = NSMapTable.weakToStrongObjects()
    
    private func subscriptionsMap<T: Observable>(forObservable observable: T) -> NSMapTable<AnyObject, AnyObject> {
        var subscriptionsMap = self.observablesMap.object(forKey: observable) as? NSMapTable<AnyObject, AnyObject>

iThinker

import Foundation

protocol Observable: class {
    
    associatedtype ObservableAction
    
    typealias SubscriptionBlock = (ObservableAction) -> Void
    
    var subscriptions: NSMapTable<AnyObject, AnyObject> { get set }
    func notifyObservers(_ action: ObservableAction) -> Void