pchelnikov

extension Optional where Wrapped == String {
    func orEmpty() -> String {
        return self ?? ""
    }
}

pchelnikov

extension UIView {

    // MARK: - Safe anchors

    /// Contains view's top anchor depending to iOS version.
    var safeTopAnchor: NSLayoutYAxisAnchor {
        if #available(iOS 11.0, *) {
            return self.safeAreaLayoutGuide.topAnchor
        } else {
            return self.topAnchor

pchelnikov

//Declare extension to URLRequest:

extension URLRequest {

    public var curlString: String {
        // Logging URL requests in whole may expose sensitive data,
        // or open up possibility for getting access to your user data,
        // so make sure to disable this feature for production builds!
        #if !DEBUG
            return ""

pchelnikov

button.transform             = CGAffineTransform(scaleX: -1.0, y: 1.0)
button.titleLabel!.transform = CGAffineTransform(scaleX: -1.0, y: 1.0)
button.imageView!.transform  = CGAffineTransform(scaleX: -1.0, y: 1.0)

b.imageEdgeInsets = UIEdgeInsets(top: 0, left: -10.5, bottom: 0, right: 0)

pchelnikov

    static func systemUptime() -> TimeInterval {
        var currentTime = time_t()
        var bootTime    = timeval()
        var mib         = [CTL_KERN, KERN_BOOTTIME]
        // NOTE: Use strideof(), NOT sizeof() to account for data structure
        // alignment (padding)
        // http://stackoverflow.com/a/27640066
        // https://devforums.apple.com/message/1086617#1086617
        var size = MemoryLayout<timeval>.stride
        let result = sysctl(&mib, u_int(mib.count), &bootTime, &size, nil, 0)