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zsh 
cp **/*.pdf /targetfolder 

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frame variable -d r MYVAR
fr var MYVAR
po MYVAR

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xcrun simctl erase all

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import Foundation
import UIKit

/// Checkbox is a simple, animation free checkbox and UISwitch alternative designed
/// to be performant and easy to implement.
public class Checkbox: UIControl {

    // MARK: - Enums

    /// Shape of the center checkmark that appears when `Checkbox.isChecked == true`.

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import UIKit
import PureLayout

extension UIViewController {
    func addChildController(_ controller: UIViewController, containerView: UIView) {
        addChild(controller)
        // When your custom container calls the addChild(_:) method, it automatically calls the willMove(toParent:) method of the view controller to be added as a child before adding it.
        containerView.addSubview(controller.view)
        controller.view.translatesAutoresizingMaskIntoConstraints = false
        controller.view.autoPinToSuperviewEdges()

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//
//  AppStoryboards.swift
//  AppStoryboards
//
//  Created by Gurdeep on 15/12/16.
//  Copyright © 2016 Gurdeep. All rights reserved.
//

import Foundation
import UIKit

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extension Data {
    var sizeMB: String{
        let formatter = ByteCountFormatter()
        formatter.allowedUnits = [.useMB]
        formatter.countStyle = .file
        return formatter.string(fromByteCount: Int64(self.count))
    }
}

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extension UIViewController {
    func add(_ child: UIViewController) {
        addChildViewController(child)
        view.addSubview(child.view)
        child.didMove(toParentViewController: self)
    }
    func remove() {
        guard parent != nil else {
            return
        }

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extension UIViewController {
    func add(_ child: UIViewController) {
        addChildViewController(child)
        view.addSubview(child.view)
        child.didMove(toParentViewController: self)
    }
    func remove() {
        guard parent != nil else {
            return
        }

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for family in UIFont.familyNames {
        let sName: String = family as String
        print("family: \(sName)")

        for name in UIFont.fontNames(forFamilyName: sName) {
                print("name: \(name as String)")
        }
}