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/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

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//
//  AppDelegate.swift
//  Scheduling
//
//  Created by Shaps Benkau on 19/02/2018.
//  Copyright © 2018 152percent Ltd. All rights reserved.
//

import UIKit

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import Foundation

public class MessageQueue {
    
    public typealias Message = Void -> Void
    
    private var exitFlag = false
    
    private var messageQueue:[Message] = []
    private var loopInterval:Double

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public class Channel<Value> {
    
    private class Subscription {
        
        weak var object: AnyObject?
        private let notifyBlock: (Value) -> Void
        private let queue: DispatchQueue
        
        var isValid: Bool {
            return object != nil

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enum HTTPStatusCode: Int {
  // MARK: - 100 Informational
  case Continue = 100
  case SwitchingProtocols
  case Processing
  // MARK: - 200 Success
  case Ok = 200
  case Created
  case Accepted
  case NonAuthoritativeInformation

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//
//  UIAccessorizedTextField.swift
//  AccessorizedTextField
//
//  Created by Damien Laughton on 28/03/2018.
//  2018 Mobilology Limited. No rights reserved.
//

import Foundation
import UIKit

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import Foundation
import PlaygroundSupport

/// A thread-safe array.
public class SynchronizedArray<Element> {
    fileprivate let queue = DispatchQueue(label: "io.zamzam.ZamzamKit.SynchronizedArray", attributes: .concurrent)
    fileprivate var array = [Element]()
}

// MARK: - Properties

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import Foundation
import PlaygroundSupport

/// A thread-safe array.
public class SynchronizedArray<Element> {
    fileprivate let queue = DispatchQueue(label: "io.zamzam.ZamzamKit.SynchronizedArray", attributes: .concurrent)
    fileprivate var array = [Element]()
}

// MARK: - Properties

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import CoreData

/// Manages Core Data Persistent History.
///
/// When using Core Data in multiple targets, e.g. an app as well as a file provider, it is crucial to merge changes from one
/// target into another because otherwise you would end up with inconsistent state. To that end, this Apple introduced
/// persistent history, which is a linear stream of changes that can be merged into the current context. This service takes
/// advantage of this feature by providing a simple interface for merging and deleting history. The latter is needed to free up
/// space after the history has been consumed by all targets. It uses history transactions' timestamps in order to determine
/// what to delete.

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// Multi to single thread execution
// Credits go to https://www.reddit.com/r/swift/comments/7ijbt0/whats_a_good_way_to_make_sync_calls_from_swift_to/dr4iwxr/

import Foundation
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true
DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(3000)) {
    print("Done")
    PlaygroundPage.current.finishExecution()