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#announcements
- y
yole
09/16/2016, 12:30 PMnow this is actually typesafe - p
punksta
09/16/2016, 3:41 PMHello! Can I use generic with val?Copy codeprotected abstract val <P> presenter: P where P : SomeClass - e
ean5533
09/16/2016, 3:48 PMI'm not sure I understand what you're trying to do. Is it this?Copy codeclass Foo<P : SomeClass> { val presenter: P } - k
kevinmost
09/16/2016, 4:06 PMright, but he doesn't want the type parameter to be on the class. I can see why, it pollutes the naming when you reference that class anywhere else - k
kevinmost
09/16/2016, 4:06 PMunfortunately I think you can only do that if you use a function - k
kevinmost
09/16/2016, 4:06 PMprotected abstract fun <P: SomeClass> presenter() : P👍 1 - e
ean5533
09/16/2016, 4:07 PMIt wouldn't make any sense to have a generic field in a non-generic class - z
zoltu
09/16/2016, 5:56 PM@punksta Curious, why not just
?protected abstract val presenter: SomeClass👍 3 - m
mbstavola
09/17/2016, 1:15 AMSounds like he wanted something like a higher-rank typescala 1 - a
athor
09/17/2016, 2:19 AMso interfaces can’t have delegated properties? Any suggestions on how to achieve that in another way? - s
semoro
09/17/2016, 4:06 AM@athor Why not use an
? Interfaces can have only abstract properties, but delegation makes property implemented, which not allowed for interfacesabstract class - k
kevinmost
09/17/2016, 4:28 AMIs there an implementation limitation as for why you can't have a default delegated value for a property like you can with a default (non-delegated) value? - v
voddan
09/17/2016, 5:32 AM@athor @semoro properties in interfaces can't be delegated with
because it requires saving an instance of the class you delegate to in a private field, and interfaces do not have stateby👍 2 - v
voddan
09/17/2016, 5:33 AMyou have to define
andget
manually in this casesset - v
vach
09/17/2016, 8:09 AMCheck this out - v
vach
09/17/2016, 8:09 AM@User uploaded a file:Screen Shot 2016-09-17 at 16.07.05.png▾
- v
vach
09/17/2016, 8:09 AM@User uploaded a file:Screen Shot 2016-09-17 at 16.07.14.png▾
- v
vach
09/17/2016, 8:10 AMhow is T both nullable and non nullable 😞 - v
vach
09/17/2016, 8:10 AMdefinition isCopy codeinternal class MinMaxOperator<T>( - v
vach
09/17/2016, 8:11 AMwhich i assume should be non nullable T - v
vach
09/17/2016, 8:15 AManyone? - c
cypher121
09/17/2016, 8:17 AM@vach if you want non-null, use
. as it is, T is only bounded by<T : Any>
and so could be either nullable or non-nullableAny?👍 2 - v
vach
09/17/2016, 8:17 AMoh right thatnks - d
dimsuz
09/17/2016, 10:28 AMwhen I haveCopy code
and I do not need to usefun util(): Pair<Int,String> { ... } val (foo, bar) = util()
, can I tell compiler I don't care about it? I triedbar
, but it doesn't work.val (foo, _) - d
dimsuz
09/17/2016, 10:28 AMI'd be fine with it, but compiler emits a warning that
is unused...bar - v
voddan
09/17/2016, 10:33 AMvote for that one https://youtrack.jetbrains.com/issue/KT-2783 - s
semoro
09/17/2016, 10:34 AM@dimsuz Also with Pair<K,V> You canCopy codeval foo = util().key - d
dimsuz
09/17/2016, 10:34 AMthanks guys - a
aaverin
09/17/2016, 1:58 PMRecurring question. What do you use to measure code coverage in Kotlin? - o
orangy
09/17/2016, 3:23 PM@aaverin IntelliJ IDEA built-in coverage.