Any tips to avoid having to manually clear chrome browser cache everytime I change CSS? Not all things suffer from this, but the package I'm using seems to.

In Java, When I had a function that returned an object and it could not pass the validations inside the function it returned a null value . Then I would checked the method if it returned null for the null-safety What approaches can I use to replace null? • Define Any type in the function and return my object or string etc.. ? • Return empty object ? • Suggestions ... Code for replace null:

fun getParentPath(son :String) : Path {
    val parent = Paths.get(son).parent

    return parent?.let {
        if (Files.exists(parent))
            parent
        else null  // need alternative
    } ?: null     //  need alternative
}

Hello I have created

Map<String,My_Info_Class>

during annotation processing. So Map is created during compile time. Is there any way I could access the same

Map object

I created in Different module ?

Ran into this, is there any reason why kotlin bytecode ignores synchronization primitive for get()

var data = false
    @Synchronized get
    @Synchronized set(value) { field = !value }

fun main() {
    println("Value $data")
}

The only way to get bytecode to call getData() is by having this redundant get (which is prompted as redundant getter in IDE)

@Synchronized get() = field

Now I lost some code. "Focus on quality and performance"

is there a way to construct an instance of KClass<Foo<Bar>> if all I have is an instance of KClass<Bar>?

was the 1.4.0 plugin removed from the repositories ? https://mvnrepository.com/artifact/org.jetbrains.kotlin.jvm/org.jetbrains.kotlin.jvm.gradle.plugin?repo=gradle-plugins

Since 1.4.0 the

contentEquals

method on classes like

ByteArray, IntArray

have been marked as deprecated. I am used to the Java world where a deprecation usually goes hand in hand with information on what can be used as an alternative. Does anyone know what can be used to compare the contents of arrays instead of contentEquals? It looks like this functionality eventually calls through to java.util.Arrays.equals which takes nullable values. So maybe this is to indicate that

ByteArray?.contentEquals

is supposed to be called and eventually the other version will just be dropped. Why not just drop it anyway in 1.4.0 already since it should just 'work'?

If I have a function with parameter param: () -> Boolean how can I call this function using method reference Foo:myFunction as a parameter?

message has been deleted

Mapping some data to kotlin I sometimes find myself doing something like this:

data class A(
  val b: B
) {
  data class B(
    val c: C
  ) {
    data class C(
      val foo: String,
      val bar: Int
    )
  }
}

I find myself hankering after a more concise way of doing the same thing; something like:

data class A(
  val b: data class B(
    val c: data class C(
      val foo: String,
      val bar: Int
    )
  )
)

I imagine those as being completely interchangeable - so the type of

A.b.c

is

A.B.C

. What do you think?

Well, what do you want to achieve in the first place?

of course, you might want to just pass that data class into your Portal class instead of creating it inside the Portal class

I have a kotlin multi-platform project with sub module

build.gradle.kts

below, but it is not creating a runable jar

import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar

plugins {
    kotlin("multiplatform")
    java
    application
    id("com.github.johnrengelman.shadow") version ("5.2.0")
}

group = "com.kotlin.mpf.server"
version = "1.0-SNAPSHOT"


val ktorVersion = "1.4.0"

repositories {
    //repos
}

kotlin {
    sourceSets {
        jvm().compilations["main"].defaultSourceSet {
            dependencies {
                //--dependencies
            }
        }
    }
}


application {
    mainClassName = "com.vhl.inventory.server.MainKt"
}

tasks.withType<ShadowJar> {
    baseName = "kotlin-mpf-runnable"
    classifier = null
    version = null
}

when ever i try to run the created fat jar, follows an error below

java -jar fat.jar

Error: Could not find or load main class com.vhl.inventory.server.MainKt
Caused by: java.lang.ClassNotFoundException: com.vhl.inventory.server.MainKt

has anyone done runnable jar in multi-platform project

I'm getting a very weird issue and wonder if someone have already seen that, before trying to find a small repro. On some suspending functions an Android TextView.getText().toString() == "" works but TextView.text.toString() == "" (As suggested by IDE and previously worked) triggers java.lang.ClassCastException: android.text.SpannableStringBuilder cannot be cast to java.lang.String. It's like in the second case the .toString() call is converted to a cast and not the proper toString()

I want to create an extension function to filter a list based on condition x, and if condition x returns an empty list, go for another condition, but I can't figure an idiomatic way to write it; here's what I've got:

no clue what I'm doing wrong with my mock (mockito-kotlin)

@Nonnull
    String[] createSfdcObjects(@Nonnull final SObject... sfdcObjects);

mock looks like

whenever(sfdcCrudService.createSfdcObjects(anyVararg()))...

, but it always returns null. I've tried every matcher (

any

,

anyOrNull

, etc) and none of them match. What am I missing?

Hey guys, what's your preferred way to read xml files? We're currently using jackson, but it has a nasty bug with empty lists (https://github.com/FasterXML/jackson-dataformat-xml/issues/124). Unfortunately we don't have access to the output parameters of the xml, so we gotta find something else. Any recommendations?

Can I somehow transform a

.kt

file with an object expression in it to the actual instance? Like with using

K2JVMCompiler

for example? Are there any examples for that?

I have a val, except I don't know what it will be until way later (like after some network stuff). but once it's set it should be immutable. Is there a pattern for this type of thing? More of a FP question than kotlin I know.

hey! Can anyone suggest me how to implement this animation with motion layout?

val jobA = Job()
val jobB = GlobalScope.launch(jobA) {
    delay(1000L)
    println("World!")
}

What is the different between

jobA

and

jobB

? If I would like to cancel the Job, which one need to be called?

jobA.cancel()

or

jobB.cancel()

?

Would it be helpful if the Kotlin language would allow

?

as an expression suffix to coerce the expression to be of nullable type? Examples:

var x = 1?

-> inferred type =

Int?

, so no need to type

var x: Int? = 1

. Later you can always set

x = null

.

someQuery()?

-> inferred type = nullable return type of

someQuery()

. If that function already returns a nullable type, then a linter warning should be shown that the

?

suffix is redundant.

The stdlib has this function:

public inline fun <C, R> C.ifEmpty(defaultValue: () -> R): R where C : CharSequence, C : R =
    if (isEmpty()) defaultValue() else this

But when copy&pasting that code it doesn’t even compile!

Type parameter cannot have any other bounds if it’s bounded by another type parameter

Is it safe to silence that error? 😮

Hey, my name is Patrick and I am interested in the multiplatform feature of Kotlin.

anyone know how to import org.jetbrains.kotlin.gradle.targets.native.tasks.KotlinNativeHostTest_Decorated in groovy? I think i'm having issues because native is a keyword

Need a generics advise, how can I make the second override work?

interface Animal {
    val id: String
    fun <T: Animal> withSound(sound: String): T
}

data class Dog(
    override val id: String
): Animal {
    // works
    override fun <T : Animal> withSound(sound: String): T {
        TODO("Not yet implemented")
    }

    // does not work
    override fun withSound(sound: String): Dog {
        TODO("Not yet implemented")
    }
}

so yeah,

withSound()

should return the same type as it is defined in

What’s the Kotlin equivalent of the Groovy

List<T>.join(..)

function?