markmaynard

import { Injectable } from '@angular/core';
import { IdleExpiry } from '@ng-idle/core';

@Injectable()
export class CookieExpiry extends IdleExpiry {
  private lastValue: Date = undefined;
  private baseDomain: string;

  constructor() {
    super();

markmaynard

object MyFirstSingleton {
    var mutablePropertyFTW = 5
}

markmaynard

object MyFirstGenericSingleton<T> {
    var mutablePrpertyFTW: T
}

markmaynard

interface SomeThing {
    fun run()
    fun play()
}

markmaynard

class Thing1: SomeThing {
    override fun run() = println("Run Fast!")
    override fun play() = println("Play Hard!")
}
class Thing2: SomeThing {
    override fun run() = println("Run Silly!")
    override fun play() = println("Play Soft!")
}

markmaynard

class ThingFactory {
    inline fun <reified T: Any> run() {
        if (myThing == null) {
        	createThing<T>()
        }
        myThing!!.run()
    }
    
    inline fun <reified T: Any> play() {
        if (myThing == null) {

markmaynard

val factory = ThingFactory()
factory.run<Thing1>() // "Run Fast!"
factory.play<Thing1>() // "Play Hard!"
factory.play<Thing2>() // "Play Hard!" ????

markmaynard

class ThingFactory {
    inline fun <reified T: Any> run() {
        if (myThing == null) {
        	createThing<T>()
        }
        myThing!!.run()
    }
    
    inline fun <reified T: Any> play() {
        if (myThing == null) {

markmaynard

val factory = ThingFactory()
factory.run<Thing1>() // "Run Fast!"
factory.play<Thing1>() // "Play Hard!"
factory.play<Thing2>() // "Play Hard!" ????

interface SomeThing {
  fun run()
  fun play()
}

markmaynard

import kotlin.reflect.KClass
import kotlinx.coroutines.*

fun main() {
  println("Welcome to Thingville, population 1")
  val factory = ThingFactory(Thing1::class)
  factory?.run() // "Run Fast!"
  factory?.play() // "Run Hard!"
  val factory2 = ThingFactory(Thing2::class) // Run Time Error: Already created as type: class Thing1
  val factory3 = ThingFactory(NoThing::class) // Compile Time Error: None of the following functions can be called with the arguments supplied: public constructor ThingFactory(clazz: ThingFactory.ThingType) defined in ThingFactory public inline fun <reified T : SomeThing> ThingFactory(clazz: KClass<???>): ThingFactory?