amfathi

func runningTime(clousure: () -> Void) {
  let start = DispatchTime.now()
  clousure()
  let end = DispatchTime.now()
  
  let runTime = CLongDouble(end.uptimeNanoseconds - start.uptimeNanoseconds) / 1e6
  print("runTime: \(runTime) ms")
}

amfathi

import UIKit

extension UIApplication {
  static func setRootController(_ viewController: UIViewController) {
    guard
      let scene = UIApplication.shared.connectedScenes.first as? UIWindowScene,
      let window = scene.windows.filter({ $0.isKeyWindow }).first
    else { return }
    
    window.rootViewController = viewController

amfathi

import UIKit

extension UIViewController {
  
  static func fromStoryboard(_ controllerIdentifier: String? = nil) -> Self? {
    let name = String(describing: classForCoder())
    let suffix = "ViewController"
    let storyboardName = String(name.dropLast(suffix.count))
    
    let storyboard = UIStoryboard(name: storyboardName, bundle: nil)

amfathi

import UIKit

extension UIColor {
    public convenience init?(hex: String) {
        let r, g, b: CGFloat

        if hex.hasPrefix("#") {
            let start = hex.index(hex.startIndex, offsetBy: 1)
            let hexColor = String(hex[start...])

amfathi

import UIKit

class ProgressView {
    
    private lazy var progressView: UIProgressView = {
        let progressView = UIProgressView(frame: CGRect(x: 15, y: 20, width: 240, height: 8))
        return progressView
    }()
    
    private lazy var alert: UIAlertController = {

amfathi

//
//  CardPagingLayout.swift
//
//  Created by Ahmed Fathi on 5/29/20.
//  Copyright © 2020 Ahmed Fathi. All rights reserved.
//

import UIKit

class CardPagingLayout: UICollectionViewLayout {

amfathi

// Source https://stackoverflow.com/a/54237526
// MARK: Source Answer
extension UITableView {

    //Variable-height UITableView tableHeaderView with autolayout
    func layoutTableHeaderView() {

        guard let headerView = self.tableHeaderView else { return }
        headerView.translatesAutoresizingMaskIntoConstraints = false

amfathi

import Foundation

extension Optional where Wrapped == String {
    /// Return true if the string value is not nil and not empty string
    var exists: Bool {
        switch self {
        case .none:
            return false
        case .some(let string):
            return !string.isEmpty

amfathi

import Foundation

private var timer: Timer?
func throttle(_ interval: TimeInterval, block: @escaping (() -> Void)) {
    timer?.invalidate()
    timer = Timer.scheduledTimer(withTimeInterval: interval, repeats: false, block: { _ in
        block()
    })
}

amfathi

/// All the primes number below & including 10e7 using Sieve algorithm O(n log log n).
/// https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes
func sieve() -> [Int] {
    let limit = 10000000 // 10e7
    
    // Create an array assumping all numbers are primes
    var isPrime = Array(repeating: true, count: limit)
    
    // Mark trivial cases as not primes
    isPrime[0] = false