Any thoughts on extending inline classes to allow for multiple fields, where these would render as immutable objects in the JVM, but as proper pass by value and return by value stack frames in the native build? If / when the Java team eventually delivers value types in the JVM, the JVM target can be modified. I have many small objects that get created at high frequency in the work I do. For now I have to use object pooling to get reasonable performance, but for the most part these could be value types.

in

val A = StringBuilder(string = "")
val B = StringBuilder(content = "")

what is the difference between

string

and

content

, like do both do the exact same thing?

why do i get

java.lang.ClassFormatError: Duplicate method name&signature in class file FileKt

in https://pl.kotl.in/tLfGFlvku

why do i get

Exception in thread "main" java.lang.IndexOutOfBoundsException: start 4, end 3, s.length() 3

for https://pl.kotl.in/PEocYV7Ns

fun String.padShrinkEnd(to: Int, char: Char): String {
    val thisLength = this.length
    val build = this.removeRange(to..thisLength).toStringBuilder()
    while(build.length < thisLength) build.append(char)
    return build.toString()
}

fun main() {
    println("\"" + "abc".padShrinkEnd(2, ' ') + "\"")
}

assuming this is correct, could this be optimized? https://pl.kotl.in/BKCVGjs_8

Not directly, you can make a top-level function next to the class with the same name to fake a constructor though. (or an

operator fun invoke

on the companion but that's even uglier)

What's the error?

a

for

loop is faster than a

forEach

expression right?

how can i force a

when

to continue to the next case even if the current case is valid for example

val x = true
val y = 1
when(x) {
    true -> when(y) {
        1 -> // go to else of when(x) and not else of when(y), since false of when(x) will not match true
        else -> println("pass")
    }
    false -> println("statement")
    else -> println("fail")
}

does multi-char unicode fit in a single Char

Hi, does Kotlin have some generic Tree<T> data structures and traversal functions on it?

are there any libraries that can convert a kotlin source directory into a... virtual heirachy tree complete with full source code information such that the source code is embedded with the information itself

for example...

src/main/kotlin/main.kt

>

val src = Heirachy.Source().directory[0].direcctory[0].directory[0].file[0].sourceCode

val file = Heirachy.Source().directory[0].directory[0].directory[0].file[0].fileName
println("source code for $file is\n$src\n")

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eg, such as bash, gcc, nm, ect

Hey, what's wrong here? I don't get any syntax error but compilator crashes with this message:

Cause: Label wasn't found during iterating through instructions
Element is unknownThe root cause was thrown at: LabelNormalizationMethodTransformer.kt:148

Hi All, Can somebody explain me how and why the map function is working with the element instead of the optional?

Hi all, How can returnList be generated in a functional way?

But isn’t that the point of sealed classes? That they act like enums and help you perform pattern-matching, without the need of the

else

branch?

Probably a wrong place to report this, but I'm getting 404 for https://pl.kotl.in right now…

how can i implement recursion without creating a variable via

val

or

var

and without creating a function via

fun

the closest i can get is a lambda expression

{ println("this is inside lambda") }

but i am unable to assign a lable to it

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I am having trouble getting this code to work. Running into the issue shown in the pic.

In case someone didn’t know, Kotlin Playground is a supported embed provider in embed.ly. As a result, we can embed Kotlin Playground code snippet on Medium directly.

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Good GUI plugin for intelliJ to view LOC?

I am wondering why this code is invalid (Conflicting overloads)

Not the best journalistic source but: https://www.businessinsider.com/why-google-square-atlassian-using-kotlin-programming-language-2019-4

any reason why

Sequence

does not implement

Iterable

? It is annoying to have to have two extension functions to support things which have a

forEach

method.