Need help on Android development here

Hi! I'm stuck and am getting no answers in Stackoverflow. Anyone cares to take a look? https://stackoverflow.com/questions/52811359/how-to-get-the-type-of-an-instance-of-javax-lang-model-element-element

Hello, World! Is it a known problem that when using coroutines in IntelliJ, we get a warning about it being experimental that links to this page, which is a

404

? https://kotlinlang.org/docs/diagnostics/experimental-coroutines

well i just hope for the best and so on

is there a dedicated channel here for questions regarding data2viz ?

is there an opposite to "inner" for classes? I want my inner class to have some private data/method that's only callable/modifiable from the outer class. Can't quite figure out how to do that. This must be a common thing, no?

Data classes are great for configuration and such when used from Kotlin, but they are kind of awkward when used from Java. Is there an easy way to generate a builder style wrapper for a data class? Similar to the

@builder

annotation in Lombok etc. Has anyone created an annotation processor or similar that does this?

Does anybody know if I can run kotlin code generated with javac version 1.8 with a java version 10 jre?

In most cases the JVM needs to do the null check anyway to possibly throw nullpointerexceptions, and so it can optimize the redundant one away.

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Hi! How can I view which lines contain errors? Now, in Analysis it just says "2 errors found, 2 warnings found". Does Android Studio have anything like "View: Toggle Problems" in Visual Studio Code?

Hi everyone, Dagger 2.18 supports incremental annotation processing. With mixed Java/Kotlin source sets can it be used? As far as I know kapt doesn't support incremental annotation processing yet. Are there any solutions that I'm not aware of?

According to many difference sources on the web

by lazy

can cause memory leaks. Notable one: https://twitter.com/chrisbanes/status/897075635142754305 Is this an old issue that has been solved in recent versions of kotlin or is it still a "gotcha" that the developer has to take care of? If still a gotcha, any suggestion on how to handle values that might not be initialized? As far as I understand I can't access the delegate directly.

Thanks for your reply! It does not seem to work. I want to add a getEnv method, which throws an Exception if the environment variable does not exists.

OK, I see. I do think it could be useful though

Hi everyone - i am writing a parse function on a Command model that I am taking (can be thought of as modeling any prompt based command). So this command is made up of arguments, e.g. an arugment for the

ping

command would be

-n 3

where

-n

is the name and

3

is the value. One of the things I am stuck on is writing a parse function on the input that will output a type based on what the argument type. So in this example for

-n 3

we would want the value returned to be

3

which is an

Int

. In some other cases we would want to parse as a string, boolean, etc. I am not sure how to make this generic to allow for any return types. I thought about doing something like

fun <T> parse(text: String, conversion: (String) -> T): T

where I could pass in a conversion function to turn a string into whatever value I wanted but I don't know how to supply a default value to that e.g. if none is provided just return it as a string. Thoughts?

Can we use kotlin for machine learning?

I'm trying to create a new Intellij project using the ktor plugin wizard but having problems

Hi all, in fact, I've kept my connectivity! May I ask about the best approach with a Tornadofx solution?

Guys, is there a way to get all arguments passed to a function? For example something like:

fun myFunction(arg1: Type1, arg2: Type2, ..., argn: TypeN) {
   val arguments = getAllArguments()
}

guys is there anything like a community of android developers in Toronto,Canada?

How does default parameters in interfaces work? The IDE complains if you try to implement the interface function with the default parameter but it doesn’t seem to mind if you leave it out

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Is code of

<http://play.kotlinlang.org|play.kotlinlang.org>

opensourced? I cannot find it. Would be good to update kotlinx.coroutines version there

Hi all, just a quick question: The difference between this:

val Foo = Bar()

and

val Foo
   get() = Bar()

is that when using getter, the evaulation happens every time when accessing

Foo

, right?

I consider another name change from Kot. Academy to Kt. Academy. We already have domain kt.academy. Comments?

I have a little question.. I do not know if I should choose Kotlin or Scala and why?

If I call a function and use the .? operator, will the function not be called when the .? fails?

Guys, is there a way to automatically make available the getters and setters of a property? For example

class MyIn {
	fun myFunction() {
		println("myFunction")
	}
}

class MyOut {
	val myIn: MyIn = MyIn()
}

class Test {
	fun main() {
		val myOut = MyOut()

		// Calling myFunction from the myIn object this way. Maybe something with delegate?
		myOut.myFunction()
	}
}

pass clientProvider to TestService?