@ianbrandt soooo are we going to live stream the Kotlin meetup next month?

Hi Mitch, I think we could use Google Meet and it should work okay. The main thing we still need is a speaker, or a few lightning talks. I've asked a couple people, but no luck so far. I've got a few things I've been toying around with, but nothing that would likely be ready in time for next week.

I wouldn’t mind doing some research on Kotlin Higher Order Functions… i.e. Run, Let, Apply, etc….. It’d probably end up being 15 - 30 mins to go in depth

I could do something on lateinit vs lazy regarding thread safety. Maybe 15-30 minutes as well :)

Awesome! That should be enough to go ahead with a meeting. If anyone else has something, do join in. Worst case is we start queuing up talks for May. 😃

I'd love to hear more about lateinit vs lazy, my coworker says lateinit is evil! I like that lazy works well with LiveDatas

I was experimenting with lateinit for my

previousWallTimeNanos

property here:

private const val UNINITIALIZED = -1L

class GameClock {

	private var previousWallTimeNanos = UNINITIALIZED

	var deltaTimeNanos: Long = 0L
		private set

	fun update(wallTimeNanos: Long) {

		if (previousWallTimeNanos == UNINITIALIZED) {
			previousWallTimeNanos = wallTimeNanos
			return
		}

		deltaTimeNanos = wallTimeNanos - previousWallTimeNanos
		previousWallTimeNanos = wallTimeNanos
	}
}

Unfortunately...

'lateinit' modifier is not allowed on properties of primitive types

So I ended up going with the plain old "if uninitialized" logic. The use case is single threaded, so I didn't need to worry about synchronization. I thought about creating a "LateInit" property delegate, but I'd only need it for the one instance in this application, so it didn't seem worth the added complexity. I'm a little surprised there isn't already such a property delegate in the #stdlib. Maybe I'll write one up and submit a pull request.