How comparable is performance of Kotlin sequences vs Java streams? I'd like to prefer one or the other for consistency, and I usually go with sequences, as it looks more similar to the non-lazy API, good for single operations, and I find it's more flexible than streams. but is there a downside to using sequences over streams?

Hey guys I am getting cursorindexoutofboundexception index -1 requested with size 1. Does anyone know what that mean?\

Question. When creating a library what std library would you recommend to use?

How do I fail json deserialization if non-nullable fields are missing in json string?

is there some helpers in jdk stdlib to zip/unzip files?

oh. This gave me an idea that I can do something like

before_script:
  - echo "kotlin.incremenal=false" > ~/.gradle/gradle.properties

Hi Guys, somebody have a post or something with experiences using koltin on backend? we are thinking on try it but I want to have some points to defend the argument.

so question about general programming... What I don't like is having half of my method taken by log.debug commands, is there some clever smart way of avoiding it at the same time still having good tracebility of what's going on... ?

What is the strategy behind YouTube offline video content? I googled, all the content stored as .Exo extension, content will be stored as a cache, all content expired within 48 hrs. content encrypted and compressed, it won't show in your sd card as well as won't show in other players. Only you can see the content will play in YouTube player. Can anyone know or already implemented in your own app, let me know the strategy? Thanks in advance

is it possible to get

third == null

instead of

IndexOutOfBoundsException

with destructuring?

val (first, second, third) = "hello,world".split(",")

Fond it:

Is

new HashMap() {{ put("this", true) }};

==

mapOf("this" to true)

(note the double

{{

)?

Is there any way to write this: https://glot.io/snippets/eya7pscezy without the

with

(not modifying the implementation of the

Weird

class) Not that I'd actually write this code

@trent the problem here is that the lambda expression is parsed as a last parameter of the preceding

set

function invocation. There are two ways to overcome this: - surround lambda with parentheses:

({ refreshRightText.set("") })

- place

;

between

set

and the lambda:

refreshRightText.set(refreshText);
{ refreshRightText.set("") }

data class Post(
        val id: String,
        val content: String,
        val timestamp: Long,
        val photos: List<String>
) : Model()

data class FullPost(
        val id: String,
        val content: String,
        val timestamp: Long,
        val photos: List<String>,
        val postedBy: User,
        val with: List<User>,
        val checkedIn: Restaurant,
        val actType: String,
        val likesCount: Int
) : Model()

Is there a better way to copy the fields of Post to FullPost? So that I don't have to repeat fields like this

Just curious on how I would go about doing an extension that is overriding a class/object. If it's the only thing I'm looking to do with a class but I can't make a subclass of it because of the way that it's used in a library so I can't just do that without doing a bunch of hacks to do it like in java

@gildor and where there is some examples, I am looking at it and cant find... I remember there where some tests somewhere which had this, but I am probably too stupid to find it

Arrow is the de-facto functional companion library

Nobody?

Yeah, I know I can just convert them back and forth, but it feels weird. Maybe it's just me. 😛

then this does not solve the casting problem

Actually I wrote something about this Generic types on Kotlin vs Java. Any review/clap is appreciated. https://medium.com/@ephepasha/kotlin-vs-java-on-defining-a-var-with-a-generic-type-fad3dd8cf506

how can I see

fun Context?.destroy()

from java?

If you’re referring to creating an interface and using it as a lambda, that’s not possible with interfaces defined in Kotlin (yet). You’ll want to use lambdas directly in Kotlin ie.

() -> {...}

or define your interfaces in Java.

Put a

.filterNonNull()

inbetween?

how can I get constructor reference?

Is there any reason why

build/resources

isn't added to the classpath when launching a gradle project via "Run/Debug" in IntelliJ?

x

is what I need to find

it's a shame

check()

doesn't return a boolean