so far I have:

if(obj.string?.isBlank() ?: true)

which is hard to read imho

how do i retain <> blocks given in a @sample

abstract class A {
    abstract val value: String
    abstract fun <T: A> test(): T
}

data class B(
    override val value: String,
    val value2: String
): A() {
    override fun test() 
        = this.copy(value = "HelloWorld")
}

How can I achieve something like this?

message has been deleted

Hello. I am having issues with running kotlin compiler in the command line in windows. I follow the instructions on the kotlinlang.org page here => https://kotlinlang.org/docs/tutorials/command-line.html I downloaded and unzipped the command line compiler and put the folder into my Program Files x86 directory. I added to the Path environment variable a dir path to the bin folder where the kotlinc.bat files exist with other various .bat files and other files with no extension. Here is the path I used in the environment variable. Environment Variable Path => C:\Program Files (x86)\kotlin-build-1.3.40-dev-1595\compiler\cli\bin When I open the command line and type the command => kotlinc or => kotlinc --help, I get the error below. Error => Could not find or load main class org.jetbrains.kotlin.preloading.Preloader any help is appreciated. 🙂

Out of curiosity, is there an idiomatic way of filtering lists by adjacent distinction? e.g.

listOf("a", "b", "b", "a", "b").distinctFromAdjacent()
// result a,b,a,b

something like

listOf("a", "b", "c", "c").fold(mutableListOf<String>()) { acc , s ->
        if (s != acc.lastOrNull()) {
            acc.add(s)
        }
        acc
    }

maybe? Ah no it's not going to work, it will just remove all consecutive characters except the first one

Is it possible to override

equals

and

hashCode

in an

inline

class? The KEEP mentioned it was possible, but it doesn't seem to work for me

yes, it is, but it removes an unnecessary character, no?

is it possible to recode the entire

glibc

in

kotlin-native

instead of

C

(assuming

kotlin-native

supports linking with

assembly

and supports

inline assembly

)

Hi folks,

specially girls

, I would like to ask you a question. Sometimes I use

Hi guys

here, but I’ve seen that maybe some people feels uncomfortable with that. So I would like to ask you, some of you feel excluded with this expression? Since I’m not from an English country I would like to know how it goes here I asked my English teacher that is from England and he said to me:

Guys is totally generic. You can even call a group of only women, "guys"

And I have followed a course with an American English teacher that call us guys in her videos. So, what do you think about it?

oh no, this kind of conversation keeps following me everywhere 😭😭😭😭

I want to build kind of a “template string” for lay people (not that much) so they can receive an input (JSON) and create an output (also JSON) via web interface. Template example:

{
   exampleArray: {{input.prices.filter(price -> price <= 100)}}
}

Any tips on how to build this kind of “template string”? Regex? Finite state transducer?

basically, what I'd like to do is:

val klass=elt::klass
klass.memberProperties.map { prop -> /* something here */ },joinToString()

- I just can't figure out what belongs in

something here

such that the property is extracted from

elt

https://github.com/JetBrains/kotlin/releases/tag/v1.3.30 Seems a release without any description. Is it stable or not?

Unresolved reference: serializer

Hey everyone is there any good tutorial that hows how to create sections when using a recyclerview?

so I can do something like

SomeJavaType.fromString("something")

Very long shot, but is there a way to do a late delegation of this sort?

class Matrix(elements: Collection<Collection<Double>>): MutableList<Vector> by data {
    val data = ObservableList<Vector>(elements.map { it.toVector() } , ::onAdd, ::onRemove)
}

In my MPP I got this error

Unresolved reference: ByteBuffer

on the line where I do

import kotlinx.io.ByteBuffer

. In my

build.gradle.kts

I have this line

implementation("org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.9.0")

, which also shows under the

Extenal dependencies

in my IDE. What could I do wrong?

Kotlin 1.3.30 released We’re happy to announce the release of Kotlin 1.3.30, a new bug fix and tooling update for Kotlin 1.3. The main areas of focus for this release have been around Kotlin/Native, KAPT performance, as well as improvements for IntelliJ IDEA. … Continue reading →

Sth like:

private inline fun updateRegistrationState(update : RegistrationState.()->RegistrationState){
    registrationState = update(registrationState)
  }

I would like to call it as:

updateRegistrationState { gender = Gender.MALE }

instead of

updateRegistrationState { copy(gender = Gender.MALE) }

data class Foo(val one: String, val two: String) {
    fun bar() = println(one + two)
}

fun Foo.bar() = println(one + two)

Can anybody explain me the difference? Is it just another way of writing the same functionality? Are there rules when it is better to use member functions and when extension functions? I thought of extension functions of mostly useful to extend third party code.

internal

is

public

in Java, so our libs leak internal API is there a way to post-process Kotlin-generated bytecode to translate the internal to package-private?

because kotlin doesn't auto-expand numeric types

Wow. I wrote some blog posts with embedded links to the kotlin playground at play.kotlinlang.org. All my examples disappeared! Can they be recovered? Update: Aaaand… the samples are back again.. not sure what happened.

i am searching for a multiplatform library for imaginary number calculation, for 2d and 3d calculations of pentagonal structures, which ones would you recommend? i am asking this before researching because i am going to bed soon, so i don't forget it tomorrow

does anyone work on macro preprocessors, as in actually design and code them