Is it possible to convert a

kotlinx.io.core.ByteReadChannel

to a

kotlinx.io.core.BytePacketBuilder

? From reading the code the both do similar things.

Is anybody getting class read errors with kts scripts on Mac JVM 11? WARN: Could not read file: /Users/fuzzyweapon/.jabba/jdk/1.11.0-2/Contents/Home!/modules/java.base/java/io/File.class; size in bytes: 17596; file type: CLASS

Hey everyone. Are Kotlin DSL for Gradle questions on topic here? I'm using the [gradle-intellij-plugin](https://github.com/JetBrains/gradle-intellij-plugin) and I recently switched from a Groovy

build.gradle

to

build.gradle.kts

. If I use the official release version of the gradle-intellij-plugin, everything works out and I can simply include it by using

plugins {
  id("org.jetbrains.intellij") version "0.4.2"
  id("java")
}

However, I need to use the latest snapshot version of this for Gradle 5.1.1, so I re-wrote this Groovy code

buildscript {
  repositories {
    mavenCentral()
    maven {
      url "<https://oss.sonatype.org/content/repositories/snapshots/>"
    }
    maven { 
      url '<http://dl.bintray.com/jetbrains/intellij-plugin-service>' 
    }
    
  }
  dependencies {
    classpath "org.jetbrains.intellij.plugins:gradle-intellij-plugin:0.5.0-SNAPSHOT"
  }
}

apply plugin: 'org.jetbrains.intellij'

to

buildscript {
  repositories {
    mavenCentral()
    maven("<https://oss.sonatype.org/content/repositories/snapshots/>")
    maven("<http://dl.bintray.com/jetbrains/intellij-plugin-service>")

  }
  dependencies {
    classpath("org.jetbrains.intellij.plugins:gradle-intellij-plugin:0.5.0-SNAPSHOT")
  }
}

plugins {
  id("org.jetbrains.intellij") version "0.5.0-SNAPSHOT"
  id("java")
}

My team and I want to stop commenting on formatting issues in Pull Requests. We have added ktlint to the project and want to integrate it into our workflow as painlessly as possible. Does anyone have any tips or experiences on how they integrated ktlint (or any other linter) with their kotlin workflow?

Declaring

class MyClass {
    fun CoroutineScope.run() 
}

MyClass

become the context of

run()

, while

CoroutineScope

become the "owner". That makes sense... But what I want the opposite effect? Sometimes I use this pattern

class Mapper<E, P> {
    fun <T> invoke( block: Mapper.() -> T ): T
    fun E.toPojo(): P
    fun P.toEntity(): E
}

And makes sense that

Mapper

is the context for call

mapper { entity.toPojo() }

But back to the first example, doesn't make sense to call

launch {
    with( myObj ) { run() } 
}

I would simply call

launch {
    myObj.run()
}

Is that possibile?

Hello everyone, I am having a small problem with co-variance. I am using two different Java libraries and one returns a Class<in T> (Class<? super T>) and the other expects a Class<T> as an argument. I am getting a type mismatch "Required: Class<T> Found: Class<in T!>!". I am sure there is a simple solution 🙂 but I can't figure out how to get from the one to the other. Any tips?

If I share code via https://play.kotlinlang.org is this going to be available permanently or there is some expiration date?

hm, kotlin.parallel.tasks.in.project=true doesn’t look like it’s threadsafe

Hi all, I was interested in doing some micro benchmarks for Kotlin vs Java, but also Kotlin 1.3.11 vs Kotlin 1.3.20. I found some earlier code based on Kotlin Hidden Costs (https://sites.google.com/a/athaydes.com/renato-athaydes/posts/kotlinshiddencosts-benchmarks). I've updated the code to the latest JMH, and I've ran the code for Kotlin 1.3.11 and 1.3.20. I've found some surprising results, but I might also be misinterpreting the results. Is there anyone here who has some knowledge on JMH/Microbenchmarks, and who can a look at some of my results?

Heya! Anyone got an example on how to get kotlinx.serialization to work on kotlin native? From what I understand, reflection is not available, but I can't figure out how to parse JSON without using it...

does intellij have an sort of assistance to stub all key/value pairs in a kotlin constructor?

I'm trying to do something here with generics and can't quite get it to work without an unsafe cast. Basically, I'm using jOOQ (http://jooq.org), and want to create a condition in similar ways on different Field<T>s in different places in the code. So the Field in question and the value I want to compare it against change, but the joining of those field/values is relatively the same. here's what I have so far, which works, but I have to cast my Field<*> to a Field<Any> in order to actually use its

eq()

method -- i need the same cast if i change it to <out Any>, and if i change it to <in Any> the

createCondition()

function works but I can't invoke it in `main()`:

data class ConditionData<T>(
    val field: Field<T>,
    val value: String,
    val transform: (String) -> T
)

fun createCondition(vararg things: ConditionData<*>): Condition {
    return things
        .map {
            val value = it.transform.invoke(it.value)
            (it.field as Field<Any>).eq(value)
        }
        .reduce { a, b -> a.and(b) }
}

fun main() {
    print(
        createCondition(
            ConditionData(DSL.sum(Tables.DATA.WATCH_TIME), "1234567.234") { s -> BigDecimal(s) },
            ConditionData(Tables.DATA.MONTH, "2018-07-01") { s -> LocalDate.parse(s) },
            ConditionData(Tables.DATA.CHANNEL, "HBO") { s -> s }
        )
    )
}

output of the main is correct:

(
  sum("data"."watch_time") < 1234567.234
  and "data"."month" < date '2018-07-01'
  and "data"."channel" < 'HBO'
)

patterns.ini

file is in resources (jvmTest) but i can't load it -

getResourceAsStream()

returns

null

Also tried

this.javaClass.classLoader.getResourceAsStream("patterns.ini")

and put

patterns.ini

in the package of class in

resources

- nothing helps

Hey Jake @jw , why did you decide to implement reflection based dagger version ? https://github.com/JakeWharton/dagger-reflect. What's purpose?

Why

Vue.js

official plugin is not supported anymore in IntelliJ 2018.3.3?

is a private setter for a var in the constructor still not possible?

Is there a Kotlin implementation (or API) of the Myers Diff Algorithm out there somewhere that is stable enough for use?

Hey guys! Could I get your opinion on a class I've made in order to add backing fields on extension variable ? Don't pay attention to the bad example I use with the theming stuff, I know there's much better ways to achieve theming in Android. I'm more interested on what you think of this as a solution (Kotlin-wise) in order to have backing fields on classes without having to extend them https://medium.com/@thorebenoit/kotlin-extension-variables-with-backing-field-b430fc6d23e4

can kotlin jvm be told to write out parameter names? equivalent to the way java 8+ can?

I just got here. I'm so new to Kotlin I don't how to start 😦. Can somebody help me with tips or suggestions???

does anyone know if there is kotlin bindings for libgit2 or a kotlin implemenation of git like JGit ? if not i might just fall back to running git commands directly.. i just plan to do simple things like clone, add, commit and tag, push

interface SomeInterface { fun getName(): String } interface SomeInterface { val name: String } Which is recommended?

Is there a

List

method in stdlib which converts

[1, 2, 3, 4]

into

[[1, 2], [2, 3], [3, 4]]

?

What is the

kotlinp

library? 😄

Any ideas how to create a

data class

using parameters? I'm thinking of doing it with a map of values, but if there's a constructor method I could call, that would be great.

Hello everyone ! Yesterday I posted an implementation for a possible memory/thread safe solution to add backing fields on extension variables. Thanks to your feedback I've improved it, here's the current state. Feel free to let me know if you see anything that could be improved. Cheers guys https://github.com/benoitthore/Enamel/tree/master/EnamelKotlin/src/main/java/com/thorebenoit/enamel/kotlin/core/backingfield

Does anyone have an alternative to the Gradle Lint plugin for the kotlin dsl?

Hey folks, new to Kotlin in general and new to kotlintest. My test class is extending a base class which extends BehaviorSpec. I’d like to execute a method on that base class from within a given block. I’ve tried things like

super.method()

, but I keep getting unresolved reference. Any tips are appreciated