I see in indented multilines that a tab inserts actually 4 spaces instead of

\t

, is this wanted or a bug?

this::class

is available, but

super::class

- not. Need this.

Hey guys. I want a combination of find and map in a single function. Find a first element that satisfies a predicate and map it over function at the same time. Scala has

collectFirst

for that. How to do it in Kotlin ?

is there an AST introspection api for kotlin similar to java jdt?

are Kotlin’s primitive type ranges different from Java ones? I’ve got this Java code that compiles just fine:

public static final Long DEFAULT_DEFAULT_SINT64 = -9223372036854775808L;

and a similar piece of Kotlin code that fails with “value out of range”:

const val DEFAULT_DEFAULT_SINT64: Long = -9223372036854775808L

to make matters worse, I’m producing this value using

BigInteger(value).toLong()

, which is supposed to narrow an out of range value, but apparently it doesn’t work with Kotlin

Is there a similar annotation to

@VisibleForTesting

for this situation

Why did JB go with the name

Unit

? I'm not a huge fan of

Void

, but I'd just as soon prefer

Blah

Just out of curiosity, why is this a thing ?

infix fun <T> Any.go(block: (T) -> Unit) {

    }

    fun main() {
        // Valid
        "".go<String> {

        }
        // Invalid
        "" go <String> {

        }
    }

t.v is not resolved

I recently had a look at ansi, and I saw libraries like jansi. They use escape codes such as

"\033[0m"

in java. However, it doesn’t seem to be a valid string in kotlin. Using the library also doesn’t seem to work for me, whereas if I replace

\033

with

\u001B

, everything works fine. Is there a reason for this, or a reason why the library doesn’t work when it is used?

can I make a type inherite from Int ?

Is there a way to make kotlinc emit indyfied string concat on java 8+?

Is there a funtion in stdlib for masking a string? I have a use case where a mask is provided say ##-## and a string say "1234" and unsafe bits say 2. So the result should be ##-34

Hello. I am still using 1.3.21 and can’t move to a newer Kotlin because kotlin embeddable compiler stopped working. I am now getting error:

ERROR: java.lang.NoClassDefFoundError: org/jetbrains/kotlin/scripting/repl/GenericReplCompiler

when I try to use it with Kotlin version > 1.3.21. Any suggestions?

Are there plans to introduce a compiler intrinsic to get a list of supertypes of a reified type T, similar to the new

typeOf

?

The new

typeOf

intrinsic does not retain type annotations. Is this intended or a bug?

Anyone knows Git? I think I deleted my project using terminal but I did not push nor pull, I think I can recover it but don't know how to, someone can help me out?

How can I ensure T has Serializable, and call .serializer() ?

In cases when utilizing types such as

interface Foo<F: Foo<F>>

I'm always confused by when I can define a type as

interface Foo<F: Foo<F>> {
    val incorrect: F // why can I almost never define it like this?
    val correct: Foo<F> // why does the type require Foo<F>, when F is already Foo<F>?
}

The JSON parsing should be parsing the object into an Int, but somewhere I need to cast it from any

after bumping Kotlin to 1.3.40 a few modules in our Android app started failing with the following error (or similar):

e: /.../Io.kt: (4, 26): Cannot access built-in declaration 'kotlin.annotation.AnnotationRetention'. Ensure that you have a dependency on the Kotlin standard library

it does make complete sense for those modules to have a dependency on stdlib, but I’m wondering how it worked before

Is there any way to name the receiver parameter that is generated for Java interop when declaring an extension function? For instance, given a file

extensions.kt

with a top-level function

@file:JvmName("Utils")

and

fun String.secretFeature()

, in the Java code, this translates to

Utils.secretFeature(myString)

. However, the parameter name for

myString

becomes

$this$secretFeature

and generates a constant available at runtime used in the generated

Intrinsics.checkParameterIsNotNull()

invocation. We rely on ProGuard for stripping out unreleased features and have a script to decompile and search for keywords. In this case, this generated parameter name is leaked as there's no way for ProGuard to remove that constant. I'd like to do something like

@receiver:JvmName("stringParam") fun String.secretFeature()

.

Is it possible to refactor

fun example(f: (String) -> Unit): Unit

into

fun example(f: (stringParam: String) -> Unit): Unit

and refactor all usages of the lambda to use that name in my project?

Hi, I'm trying to update from kotlin 1.3.31 to kotlin 1.3.40, and noticed that:

Starting from 1.3.40, the compilations.outputKinds is no longer supported, please use the binaries API instead.

Can anyone help me to convert this line of gradle into "binaries API"?

fromPreset(project.hasProperty('iosDevice') ? presets.iosArm64 : presets.iosX64, 'ios') {
            compilations.main.outputKinds 'framework'
        }

https://twitter.com/kotlin/status/1143451265000759296 Use !is and !in - the counterparts of is and in operators https://pl.kotl.in/S19yPNXpX Twitter

Hi everyone! Is there a job channel>

Hey, does anybody know how to filter out logcat messages that match regex

\d{3}\.\d{10},

? Negative lookup

(?!\d{3}\.\d{10},)

doesn’t seem to work here for some reason. The example message looks like this

2019-06-25 13:45:22.286 13313-13351/com.secretproject.alpha I/Http Response: │       247.2145208724,

Filtering out based on TAG is not a feasible solution, because I need this to log out other responses.

I don't understand why does the compiler think i am trying to pass a second lambda to

run

run {
  // some code
}

{ /*my unrelated block here*/ } shouldNotThrow AnyException

Is there any ongoing work on the Result type to make it more available without the current restrictions ? I'm mostly interested in having Result with the language improvements mentioned in the "integration into the language" section (https://github.com/Kotlin/KEEP/blob/master/proposals/stdlib/result.md#integration-into-the-language) @elizarov

Guys, do anybody else feel that IntelliJ Ultimate is pretty slow to do it's things? Sometimes it takes 2~3 seconds to find out that a class isn't imported