Stefan schmittsfn

iOS Quiz

let is a constant variable and thus can be assigned once only -- its value is immutable.
var is a variable that can be assigned multiple times -- its value is therefore mutable.

An Optional is a wrapper around an object instance that returns nil when said instance doesn't have a valid value.
Using if let allows you to test an Optional instance against nil and change control flow depending on the result. The process of assigning an Optional to a variable inside a conditional statement is called 'Optional Binding'.

	import CarPlay
	import Foundation

	@available(iOS 14.0, *)
	final class CarPlaySceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate {

	var interfaceController: CPInterfaceController?
	var coordinator: CarPlayBaseCoordinator?

	// CarPlay connected

	import Foundation

	protocol Queuable {
	associatedtype T

	var items: [T] { get set }
	}

	extension Queuable {
	mutating func enqueue(element: T) {

	// Copyright (c) 2019 sts2055

	// Permission is hereby granted, free of charge, to any person obtaining a copy
	// of this software and associated documentation files (the "Software"), to deal
	// in the Software without restriction, including without limitation the rights
	// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	// copies of the Software, and to permit persons to whom the Software is
	// furnished to do so, subject to the following conditions:

	// The above copyright notice and this permission notice shall be included in all

	/* It is recommended to use dlopen & dlsym to call these functions, and use this header as a reference.
	Example:
	void *IOMobileFramebuffer = dlopen("/System/Library/PrivateFrameworks/IOMobileFramebuffer.framework/IOMobileFramebuffer", RTLD_LAZY);
	IOMobileFramebufferReturn (IOMobileFramebufferGetMainDisplay)(IOMobileFramebufferRef pointer) = dlsym(IOMobileFramebuffer, "IOMobileFramebufferGetMainDisplay");
	dlclose(IOMobileFramebuffer); */

	/* You may have to include your IOSurface header to compile, because of the IOMobileFramebufferGetLayerDefaultSurface function. If you do not have it, you may just uncomment the typedef to an IOSurface below. */
	#include <stdio.h>
	#include <sys/mman.h>
	#include <mach/mach.h>

	package net.hockeyapp.android;

	import java.io.BufferedWriter;
	import java.io.File;
	import java.io.FileNotFoundException;
	import java.io.FileWriter;
	import java.io.FilenameFilter;
	import java.util.Date;
	import java.util.UUID;