stinger

import RxSwift

// -- View Model
struct LoginViewModel {

    var username = Variable<String>("")
    var password = Variable<String>("")

    var isValid : Observable<Bool>{
        return Observable.combineLatest( self.username, self.password)

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class MyCustomView : UIView {

    var sink : AnyObserver<SomeComplexStructure> {
        return AnyObserver { [weak self] event in
            switch event {
                case .next(let data):
                    self?.something.text = data.property.text
                    break
                case .error(let error):
                    self?.backgroundColor = .red

stinger

import Foundation
import UIKit

// Usage Examples
let shadowColor = Color.shadow.value
let shadowColorWithAlpha = Color.shadow.withAlpha(0.5)
let customColorWithAlpha = Color.custom(hexString: "#123edd", alpha: 0.25).value

enum Color {
    

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/usr/libexec/PlistBuddy -c 'Add :LSUIElement bool true' /Applications/iTerm.app/Contents/Info.plist

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// Add the following to the Info.plist
// <key>NSCameraUsageDescription</key>
// <string>Allow our app to take photos</string>

AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo, completionHandler: {[weak self] status in
	if status {
		let session = AVCaptureSession()
		for device in AVCaptureDevice.devices() {
			if let device = device as? AVCaptureDevice, device.position == AVCaptureDevicePosition.back {
				self.device = device

stinger

import UIKit

final class SDPresentationManager: NSObject, UIViewControllerTransitioningDelegate {

  func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source: UIViewController) -> UIPresentationController? {
    return SDModalPresentationController(presentedViewController: presented, presenting: source)
  }

  func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
    return SDModalTransitionPresentationAnimator()

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func showPushNotification(title: String, details: String) {
  if #available(iOS 10.0, *) {
    let interval = TimeInterval(1)
    let trigger = UNTimeIntervalNotificationTrigger(timeInterval: interval, repeats: false)
    let content = UNMutableNotificationContent()
    content.title = title
    content.body = details
    let req = UNNotificationRequest(identifier: "localPushNotification", content: content, trigger: trigger)
    let center = UNUserNotificationCenter.current()
    center.getNotificationSettings(completionHandler: { settings in

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import UIKit
import MapKit

extension MKMapView {

    func showLocation(at coordinate: CLLocationCoordinate2D) {
        self.removeOverlays(self.overlays)
        self.removeAnnotations(self.annotations)

        let annotation = MKPointAnnotation()

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//: # Swift 3: JSON-serializable structs using protocols
//: Most of the implementation is based on the code in [this blog post](http://codelle.com/blog/2016/5/an-easy-way-to-convert-swift-structs-to-json/)
import Foundation

//: ### Defining the protocols
protocol JSONRepresentable {
    var JSONRepresentation: Any { get }
}

protocol JSONSerializable: JSONRepresentable {}

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//: # Swift 3: URLSessionDelegate
//: The following example shows how to use `OperationQueue` to queue the network requests. This is useful in many ways (for delaying queued requests when the networking goes down for example)

import Foundation
import PlaygroundSupport

class Requester:NSObject {

    let opQueue = OperationQueue()
    var response:URLResponse?