Brendan MolloyI could really use some help with macOS UI work for this Mastodon client I'm working on. I'm struggling ridiculously with the core concept of NSTableView cell resizing.
Please boost.
charlag test account@piecritic hey, I'm an ex-iOS dev but I may help
@charlag every part of that toot is perfect.
@piecritic my journey was Android -> iOS (Swift!) -> (for the short time) Android -> iOS and Android (another guy leaves) and now I'm going to do Android only in another place
@charlag my company does Kotlin on Android to make it not totally suck. :)
@piecritic yeah, I brought Kotlin here too and it rocks. I miss some protocol stuff from Swift and that optional types are not real but apart from that it rocks, so many good design decisions
@charlag don't buy into that lie. Kotlin nullable types are real in Kotlin, as much as Swift nullable types are real in Swift.
Objective C can break those constraints just as well as Java can in Kotlin.
@piecritic I didn't mean that you can break it. Ofc you can. I meant that there's actually no optional types at runtime and you cannot make optional type from non-optional by hand
@charlag you've broken me. What do you mean by "cannot make optional type from non-optional by hand" at runtime?
@piecritic sorry, I probably hurry too much and cannot explain stuff properly.
suppose you have
let x = "Masto!"
How do you make a String? from x?
In Swift, you can
Optional(x)
in Kotlin, you cannot, there's no
enum Optional<T> { ... }
suppose you have
let x = "Masto!"
How do you make a String? from x?
In Swift, you can
Optional(x)
in Kotlin, you cannot, there's no
enum Optional<T> { ... }
@charlag I thought that might be what you are saying, but I can't think of the use case.
If you really need that you can just do this:
fun String.optional(): String? {
return this
}
@piecritic there was one case when I wanted to use Rx like that
someNetworkRequest()
.map { Optional(t) }
.onErrorJustReturn(nil)
.filter { it != nil }
but I had to go with something like
.onErrorResumeNext(Observable.empty())
@charlag why were you passing an optional out of a map? I usually use flatMap to get _rid_ of optionals in Rx.
In RxSwift, RxOptional's filterNil.