lanserxt

func printRoots(a: Double, b: Double, c: Double, showImaginaryRoots: Bool = false) {
    
    let b2 = b * b
    let disc = b2 - (4 * a * c)
    
    let discSqrt = sqrt(fabs(disc))
    let isImage = disc < 0
    
    let result = b * b - 4.0 * a * c

lanserxt

#insert after all pods declaring (just put at the bottom of a file)
post_install do |installer|
    installer.pods_project.targets.each do |target|
        if target.name == 'POD_NAME_HERE'
            target.build_configurations.each do |config|
                config.build_settings['SWIFT_VERSION'] = '4.0'
            end
        end
    end
end

lanserxt

func piCalc(_ totalPoints: Int) -> Double {
    var nPointsInside = 0
    for _ in 1...totalPoints {
        let (x, y) = (drand48() * 2 - 1, drand48() * 2 - 1)
        if x * x + y * y <= 1 {
            nPointsInside += 1
        }
    }
    return 4.0 * Double(nPointsInside) / Double(totalPoints)
}

lanserxt

extension UINavigationController {
    func popToLastViewControllerType<T>(_ typeOfVC: T.Type) {
        if let vc = viewControllers.last(where: {$0 is T}) {
            popToViewController(vc, animated: true)
        }
    }
  
  func popToFirstViewControllerType<T>(_ typeOfVC: T.Type) {
        if let vc = viewControllers.first(where: {$0 is T}) {
            popToViewController(vc, animated: true)

lanserxt

fileprivate var propertyAnimator: UIViewPropertyAnimator!
fileprivate var blurEffectView: UIVisualEffectView!
fileprivate var backGradientView: UIView!

func addWorkoutBlur() {
    if !UIAccessibilityIsReduceTransparencyEnabled() {
        if blurEffectView != nil {
            blurEffectView.removeFromSuperview()
        }
        if backGradientView != nil {

lanserxt

class Fraction: ExpressibleByStringLiteral {
    private(set) var n: Int
    private(set) var d: Int
    
    init(numerator: Int, denominator:Int) {
        self.n = numerator
        self.d = denominator
    }
    

lanserxt

do {
   try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, mode: AVAudioSessionModeDefault, options: .mixWithOthers)
   try AVAudioSession.sharedInstance().setActive(true)
 } catch {
      print(error)
     }

lanserxt

func stripUrlToValid(_ url: String) -> String {
    var stripped = url.trimmingCharacters(in: .whitespacesAndNewlines)
    
    if stripped.hasPrefix("https") {
        stripped = stripped.replacingOccurrences(of: "https", with: "")
    }
    if stripped.hasPrefix("http") {
        stripped = stripped.replacingOccurrences(of: "http", with: "")
    }
    while stripped.hasPrefix(":") || stripped.hasPrefix("/") {

lanserxt

final class LoopedVideoPlayerView: UIView {
    
    fileprivate var videoURL: URL?
    fileprivate var queuePlayer: AVQueuePlayer?
    fileprivate var playerLayer: AVPlayerLayer?
    fileprivate var playbackLooper: AVPlayerLooper?
    
    func prepareVideo(_ videoURL: URL) {
        
        let playerItem = AVPlayerItem(url: videoURL)

lanserxt

//: [Previous](@previous)

import UIKit
import PlaygroundSupport
import AVFoundation
import AVKit

let frame = CGRect(x: 0, y: 0, width: 400, height: 400)

final class LoopedVideoPlayerView: UIView {