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#getting-started
- b
brk
05/10/2017, 12:20 PMhas decompiled:Copy code
got this lol:import kotlinx.coroutines.experimental.* fun main(args: Array<String>): Unit { runBlocking { delay(1000) println("hello world") } } - b
brk
05/10/2017, 12:21 PM@User uploaded a file:image.png▾
- b
brk
05/10/2017, 12:23 PMseems it's not working with (experimental) coroutines 😞 (https://youtrack.jetbrains.com/issue/IDEA-172670) - o
orangy
05/10/2017, 12:25 PM@yole ^^ - t
tapchicoma
05/10/2017, 1:15 PMAS doesn't complain and compile successfully following code
whereattributes.forEach { name, value -> attribute(name, value) }
isattributes
. But when app running this code I gotmapOf<String, String>()
exception. When I changed toClassNoDefFoundError
everything works ok Is it a bug in Kotlin?attributes.forEach { entry -> attribute(entry.key, entry.value) } - m
miha-x64
05/10/2017, 1:16 PMNo, it is a bug in Android, there’s still no BiFunction before API 24 🙂 - m
miha-x64
05/10/2017, 1:17 PMYou can also try{ (key, value) -> - t
tapchicoma
05/10/2017, 1:17 PMahh, good to know - m
mohsenoid
05/10/2017, 1:17 PMMy first experiences with #kotlin some quick notes that might comes handy for beginners https://medium.com/@mirhoseini/my-first-experiences-with-kotlin-b3fcf5e111f7 - t
tapchicoma
05/10/2017, 1:17 PMshouldn't be there some lint that checks this? - m
miha-x64
05/10/2017, 1:19 PM - q
quiro
05/10/2017, 1:26 PMFor Android it's going to be fixed in version 1.1.3 https://youtrack.jetbrains.com/issue/KT-16712 - m
mrtreinis
05/10/2017, 4:24 PMThere is a syntax like
that allows to run block if not null. Is there a similar syntax to run block if is null?foo?.let {} - e
elizarov
05/10/2017, 4:26 PMfoo ?: run {}😮 4 - m
mrtreinis
05/10/2017, 4:30 PMSomewhat not very readable this one - m
mrtreinis
05/10/2017, 4:32 PMI think my coworkers will hate me if I try this 😄 - e
elizarov
05/10/2017, 4:33 PM
reads like "or else"?: - p
poohbar
05/10/2017, 7:29 PMdoes Kotlin somehow simplify the usage of the classic Java builder pattern? Java:new MyPerson.Builder().name("Jack").age(40).build() - k
kevinmost
05/10/2017, 7:31 PMif you want to rewrite it in Kotlin with default + named params, that's cleaner from a Kotlin perspective, but if you want Java + Kotlin users to both consume it, just use the builder - p
poohbar
05/10/2017, 7:34 PMtoo bad.. it would be nice if Kotlin had some kind of comprehension for the builder pattern just like when it turns java fields + accessors into Kotlin properties - a
andrioli
05/10/2017, 7:40 PM@andrioli has left the channel - c
cedric
05/10/2017, 7:56 PM@poohbar
mitigates the builder pattern to some extent:applyCopy code
but the Builder pattern can still be useful if you don’t want to construct an instance before validating its init parametersWindow().apply { height = 200 width = 200 } - p
poohbar
05/10/2017, 7:57 PMyeah.. this works if the 3rd party library exposes setters as well as the builder - d
diesieben07
05/10/2017, 7:57 PMNamed parameters with default values sound like the perfect alternative to me - p
poohbar
05/10/2017, 7:57 PMIt is an alternative but I am talking about using existing old school java library (e.g. deeplearning4j) - d
diesieben07
05/10/2017, 7:57 PMAh, I thought you wanted to write your own builder. - c
cedric
05/10/2017, 7:57 PM@diesieben07 named parameters don’t help the scenario where various combinations of init parameters are valid but not others - p
poohbar
05/10/2017, 7:58 PM@cedric Interesting use case. You are right. - d
diesieben07
05/10/2017, 8:00 PMYou might be able to get that to work with multiple
methods on the companion object which then delegate to the constructor. But I am not sureinvoke