You can also

map

it.

doubleArray.map { it.toFloat() }

UPD As was fairly noticed,

map

returns

Array<Float>

, which I overlooked. You need to additionally call

toFloatArray()

to avoid boxing

what is the best practice strategy in kotlin/android to save an array and use it after?

is there a guide somewhere to submitting a kotlin issue? i can’t seem to find one

Hi, Can anyone explain what "backing field" is, with code sample. I'd appreciate it.

Hi I want to run python scripts from the kotlin server which is written with spring boot ?? Scripts are written in python 3.0

I need to stop asking stupid question... I did not look the

use()

doc (https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.io/use.html)... Sorry!

you can also just use https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.io/java.io.-file/append-text.html

Hello! If I were be to explain asynchronous programming to a newbie, what would be some simple examples of situations when a client actively need to do something useful while waiting for server/database? I want real-life-ish situations to drive my point. Keeping UI event loop responsive, what else?

Is there a way to get reference to lambda in its definition?

val lambda = { value : Int -> executor( value, this ) }

oh yay I just got to my first "a mutable property that could have been changed by this time" error.

Hello. Could somebody have a look at this

build.gradle.kts

and hint me how to make the project work with latest 1.3.rc and ktor 1.0.0.alpha-3?

what is the difference between

fun <T : BaseClass> doThing() : ReturnType

and

fun <T> doThing() : ReturnType where T : BaseClass

? is it just a matter of taste ?

another question where i am not even sure where to begin searching.. is there a annotation that lets the user know that something else might be cleaner and replace code that is less severe than

@Deprecated

usecase is a DSL

how can I check for the nullability of a variable that should contain a function?

Hence all the fanfare around unsigned types in 1.3

@mruno

data classes do not have a different base class.

is this is how we are supposed to write a string to output stream?

how can i make a function with optional non nullable parameter which will use the default when i pass in null?

fun foo(input: String = "default")...

val s: String? = "hi"
foo(s) // error

am I missing something?

I know I could just omit the parameter but then I would have to do:

if (s == null) foo() else foo(s)

but I feel weird having global fun createFooViewModel(...)

Getting an error on the

tag

within my

start

method saying:

Required:

Tag<T#1 (type parameter of com.revl.metrics.Timer1.start)>

Found:

Tag<T#2 (type parameter of com.revl.metrics.Timer1)>

style guide says I should use classic for loop over forEach. I am paranoid android and dont want to instantiate iterators on arraylists, so, would creating a extension function forXYZ, which is just a for until loop, be considered antipattern?

in programming generally, is it common to write a function that can accept more than 1 type of object?

looking for where to get started if i was to use kotlin

If I define a lazy property with an initializer as in this code. Does initializer have access to X and if so how is it accessed?

Does Kotlin have any native way of working with an event driven architecture (like in C#, or Node.js EventEmitters)? I'm planning on making a library that, by definition, must be event driven and allow the user to define a set of handlers in response to the occurrence of a certain event. What would be the preferred way in Kotlin, or the best way according to your personal preferences? I'm thinking of defining an event class which has a list of handlers and then define a subscribe method to add the functions. I'm willing to implement this from scratch, but the main purpose of the library is not this one and I prefer to reuse an existing library if possible.