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Queue.main.execute {
  //Perform a task asynchronously
}

Queue.background.execute {
  //Perform a background task 
}

Queue.userInteractive.execute {
  //Perform an userInteractive task 

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import Foundation

protocol ExecutableQueue {
    var queue: DispatchQueue { get }
}

extension ExecutableQueue {
    func execute(closure: @escaping () -> Void) {
        queue.async(execute: closure)

behrank

import UIKit
import RacoonKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        //How to add subviews.
        let firstView = UIView()

behrank

import UIKit
import RacoonKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        //How to add subviews.
        let firstView = UIView()

behrank

import UIKit
import RacoonKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        //How to add subviews.
        let firstView = UIView()

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//
//  API.swift
//
//  Created by Taro Minowa on 6/10/14.
//  Copyright (c) 2014 Higepon Taro Minowa. All rights reserved.
//

import Foundation

typealias JSONDictionary = Dictionary<String, AnyObject>

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// YourProject-Bridging-Header.h
#import <FacebookSDK/FacebookSDK.h>


// AppDelegate.swift
import UIKit
 
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    .