I have the following regex in JS -

/[()\/]/g

that matches

(

,

)

,

/

anywhere in a string. Why exactly the same pattern doesn’t work with Kotlin when I pass it to the

Regex

?

Could somebody help me in https://stackoverflow.com/q/61389146/11377112. In short i have a dependency which specifies kotlin plugin as:

id 'org.jetbrains.kotlin.jvm' version 1.+

and it fetches 1.4-M1, and that version of kotlin-stdlib-jdk8 dependency is not available, it errors:

Could not find org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4-M1.

Possible solution:
 - Declare repository providing the artifact, see the documentation at <https://docs.gradle.org/current/userguide/declaring_repositories.html>

Hello I have an interface like the following. For some reason, if I try to pass a method reference like

MyJavaClass::hasData

as an

IsStateRunningCheck

argument I get the following error. Found KFunction1 and not my interface. Is this an instance of SAM conversion not working properly or is there something I can do to make this possible.

@FunctionalInterface
protected interface IsStateRunningCheck<T> {
    boolean isStateRunning(T state);
}

For instance:

fun myFooMethod(stateCheck: IsStateRunnningCheck<Int>) { ... }

fun test() {
   myFooMethod(MyJavaClass::hasData) // fails to compile
   myFooMyethod( { it.hasData() }) // works fine
}

// I don't think it matters if this is java or not
class MyJavaClass<Int> { 
  boolean hasData(int x) { return true; }
}

How do i unescape an html string to render it perfectly in browser? I am using https://github.com/lukasjapan/koreander library! Here is extended information of code and output: https://stackoverflow.com/questions/61391828/how-to-unescape-html-in-string-in-koreander-templates

Is there a functional style of doing a do while (so that I don't have to create a variable before entering loop)? Basically I have an array and I generate a new array with 1 less element, when no more elements or the array is in the desired state the loop is done.

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invalid access to protected function, weird issue

What’s the correct way to access the synthesized Java class for a non-class function? Need it for resource loading purposes.

Around when should we expect 1.4 to be stable?

I have a question about Kotlin contracts. As a library creator, how can I define functions that leverage contracts without forcing the users to use

OptIn

annotation or compiler flags? Should I annotate my methods/files with

@OptIn(ExperimentalContracts::class)

?

Why DOESN’T Kotlin smart cast work here?

fun SLLNode?.sumListWith(node: SLLNode?, carry: Int = 0): SLLNode? =
    when {
        this == null && node == null -> if (carry == 0) null else SLLNode(carry)
        this == null -> node.also { it!!.value += carry } // Smart cast doesn't work here.
        node == null -> this.also { value += carry } // Works here.
        else -> {
            ...
        }
    }

Can you use an elvis operator on a Pair's contents?

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Does anyone here have experience with CMake? I’ve got what I think is a fairly simple problem - just struggling to find headers included via a library project

Have a question with Kotlin syntax but it's related about Retrofit, is this the correct place to do it? I'm about to create an inline function and use generics... Let me know if I can ask it here

Am I doing something wrong? This lazy is the normal lazy from the kotlin stdlib

I’m curious about how people use

Map

in Kotlin. What do y’all do? https://twitter.com/pablisc0/status/1254465101224120324

Do most people stay away from using kotlin standard functions? I just joined a project where they advise to not use them as it adds overhead to having to think about what's actually going on. I understand that these functions are just another tool in your toolbelt, and so it's up to everyones discretion on whether or not we should use that tool, but does anyone have similar feelings about typically not using them? Converting 5 lines to 4 doesn't seem like an improvement most times. Is there a good reason to use any of them? I've read that functions like let and apply are probably the most useful so that you don't have to do

myobject.somethingInner.somethingNested.setter1 = true
myobject.somethingInner.somethingNested.setter2 = false
myobject.somethingInner.somethingNested.setter3 = false

That seems like a legitimate use case to me to not have to repeat so you can do

myobject.somethingInner.somethingNested.apply {
setter1 = true
setter2 = false
setter3 = false
}

I also read that this makes things thread safe. So while that sounds good. I don't know what that actually means. Is my first statement not thread safe?

Hi all, I am porting some Kotlin/JVM code to Kotlin/Native - original logic relied heavily on ByteBuffer, which was used for parsing Float / Double / Long etc.. values out of one long ByteArray. In Kotlin Native ByteBuffer is not available, is there some easy way to parse ByteArray contents? I am using Kotlin 1.3.71

Hi, Im splitting my app into multiple modules and im having some trouble with enums. I have 3 modules (network, database, repository). They all have their own data entity classes that use enums for certain fields (for example verificationStatus in the server response would be an enum). Should I have separate enums in each layer or should I share one class between all 3? Right now im having the enums only in the repository layer but im not sure if thats the best way

Hey guys, is it possible to extend a data class with an abstract class? My use case is as follows, I have a CommonResponse Params abstract class

abstract class CommonResponseParams (
    val type: String,
    val code: String,
    val message: String,
    @SerializedName("request_id")
    val requestId: String,
    val detail: CommonDetailsResponseObject?
)

And I have a more specific Response Params which has the Common Params on top of it I wish to extend this data class with the abstract class above

data class GetCategoryAttributeResponse (
    val commonDetails : CommonDetailsResponseObject,
    @SerializedName("data")
    val getCategoryData: CategoryAttributeResponseData
)

Coming from a Typescript world, it would be something like

interface Response extends CommonResponseParams {
 // API endpoint specific params
}

message has been deleted

Hello All, The code 

object : GenericType<Pair<F, S>>() {}

produces raw type of 

GenericType<Pair<? extends F, ? extends S>>

 how to remove 

? extends

Thanks in advance 🙂

Hello all, Quick formatting question, when chaining calls with lambdas, which one is correct: (provided the code inside the brackets is longer than one line) 1.

(1..10).filter {
    it < 5
}
    .map {
        val double = it * 2
        double*3
    }
    .map {
        it.dec()
        it + 5
    }

2.

(1..10).filter {
    it < 5
}.map {
    val double = it * 2
    double * 3
}.map {
    it.dec()
    it + 5
}

The coding convention suggests that when chaining calls you should put each call on a new line starting with a dot but I don’t how if it applies to lambdas and other {} things

Hi all, very general Kotlin question here. Is there a way to access a property of a context object when using when clause? For example let's say I have someObj reference which has a string property of propOfSomeObj. when (someObj) { ::propOfSomeObj.isBlank() -> ... }

how do I properly implement

.toSentence()

? the difficult part is not having leading or trailing whitespaces

I have a function which returns an object of

ViewHolder

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
    return when (viewType) {
        0 -> ViewHolder(CategoryHeaderBinding.inflate(LayoutInflater.from(parent.context), parent,false))


        else -> ViewHolder(CategoryCardBinding.inflate(LayoutInflater.from(parent.context), parent, false))
    }
}

it passes either

CategoryHeaderBinding

or

CategoryCardBinding

to

ViewHolder

class ViewHolder(private val binding: CategoryCardBinding OR CategoryHeaderBinding) :
        RecyclerView.ViewHolder(binding.root) {
    }

How do I make

ViewHolder

accepts

binding

to be either

CategoryCardBinding

or

CategoryHeaderBinding