RustyKnight

import Foundation
import UIKit

extension UIView {
	
	var firstResponder: UIView? {
		guard !isFirstResponder else {
			return self
		}

RustyKnight

import Foundation
import UIKit

extension UIView {
	
	var firstResponder: UIView? {
		guard !isFirstResponder else {
			return self
		}

RustyKnight

import Foundation
import UIKit

typealias AlertActionHandler = (_ action: UIAlertAction) -> Void

extension UIAlertAction {
	static var okay: UIAlertAction {
		return UIAlertAction(title: "OK", style: .default, handler: nil)
	}

RustyKnight

import Foundation
import UIKit

extension UIViewController {

	@objc func presentErrorAlertWith(message: String,
															preferredStyle: UIAlertController.Style = .alert,
															handler: AlertActionHandler? = nil) {
		guard Thread.isMainThread else {

RustyKnight

import Foundation
import UIKit

struct Device {
	
	// MARK: - Singletons
	
	static var shared: UIDevice {
		struct Singleton {

RustyKnight

extension String {
	func encode(from: String.Encoding, to: String.Encoding) -> String? {
		guard let originalData = data(using: from) else {
			return nil
		}
		return String(data: originalData, encoding: to)
	}
}

RustyKnight

import UIKit

var greeting = "Hello, playground"
let key = "Test"
let value = "test".data(using: .utf8)!
let defaults = UserDefaults.standard

func printUD() {
    print("UserDefaults after modification:\n")
    defaults.dictionaryRepresentation().forEach { print("\($0): \($1)\n") }

RustyKnight

import UIKit
import PlaygroundSupport

final class MyViewController: UIViewController {

    let button = UIButton(type: .custom)

    override func loadView() {
        let view = UIView()
        view.backgroundColor = .green

RustyKnight

import java.util.Scanner;

/*
I see to often people using Scanner to get user input and just, plainly, screwing it.
People don't seem to realise that they can use multiple Scanners to make life easier
for themselves, for example, the primary Scanner can just be used to get the next line
of text input by the user, then a secondary Scanner can be used to parse the input
based on their needs.  The following is a simple example to prompt the user for a int
value, with a optional exit value and error message
*/

RustyKnight

protected Point2D pointOnEllipse(double angle, Point2D center, double width, double height) {
    width = width / 2d;
    height = height / 2d;

    angle = Math.toRadians(angle);

    double t = Math.atan(width * Math.tan(angle) / height);
    return new Point2D.Double(center.getX() + width * Math.cos(t), center.getY() + height * Math.sin(t));
}