Good Afternoon, in Brazil

@melanchroes You're adding the same

path

list every time to the

results

list. Then you're mutating it, eventually clearing it.

Hello all 👋 I don't want to spark a big discussion, and hopefully this is the right channel but I was wondering what the state of expression trees in Kotlin is. I see some messages stating that it's planned but I don't seen anything other than that. Anyone here has any idea?

my code

// Java class
public class BaseOne {
    public static void m1() {
        System.out.println("BaseOne");
    }
}

// redefined method in child _java_ class
public class BaseThree extends BaseOne {
    public static void m1() {
        System.out.println("BaseThree");
    }
}

// Kotlin 
class BaseTwo : BaseOne() {
        companion object { 
                fun m1() { // Error raises here :(
                        println("BaseTwo")
                }
        }
}

Is there an estimated timeline for coroutines to graduate from experimental?

Using a closure:

fun <T> LiveData<T>.distinct(): LiveData<T> {
    var lastValue: Any? = Any()

    return MediatorLiveData<T>().apply {
        addSource(this@distinct) {
            if (it != lastValue) {
                lastValue = it
                postValue(it)
            }
        }
    }
}

Or using a property of the object:

fun <T> LiveData<T>.distinct(): LiveData<T> {
    return MediatorLiveData<T>().apply {
        addSource(this@distinct, object : Observer<T> {

            private var lastValue: Any? = Any()

            override fun onChanged(value: T?) {
                if (value != lastValue) {
                    lastValue = value
                    postValue(value)
                }
            }

        })
    }
}

Any arguments to prefer one over the other?

what's the best way to poll a queue in a loop? I suppose a normal for-loop wouldn't remove the elements from the queue

Are there coroutines or similar in Swift?

Yup, did anyone contradict that?

I remember they said there will be a way to check if a

lateinit var

is initialised or not, is that out already?

Auto generating code documentation with /** + enter for kdoc does not work in IntelliJ. Anyone an idea 💡 ?

is there a native channel, too?

Hi guys, is there a separate thread for Servlet / Jetty ?

Hello guy, I have aquestion. What does "the fisrt class suppor for kotlin on Android" means?

I think there has been some discussion already about assuming all platform type are nullable or something

Is this a bug in the compiler? If I uncomment the two lines I get a compile error

e: org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: org.jetbrains.kotlin.codegen.AccessorForPropertyDescriptor cannot be cast to org.jetbrains.kotlin.codegen.AccessorForPropertyBackingField
Cause: org.jetbrains.kotlin.codegen.AccessorForPropertyDescriptor cannot be cast to org.jetbrains.kotlin.codegen.AccessorForPropertyBackingField
File being compiled and position: (48,33) in /Users/rwondratschek/dev/projects/evernote/evernote/libs/style/fonts/src/main/kotlin/com/evernote/android/font/EvernoteFont.kt
PsiElement: isInitialized
The root cause was thrown at: ExpressionCodegen.java:1974

private lateinit var typeface: Typeface

    fun getTypeface(context: Context): Typeface {
        if (!::typeface.isInitialized) {
            synchronized(this) {
//                if (!::typeface.isInitialized) {
                    typeface = try {
                        if (fontRes >= 0) {
                            ResourcesCompat.getFont(context, fontRes) ?: Typeface.DEFAULT
                        } else {
                            Typeface.create(context.getString(stringFontRes), style)
                        }
                    } catch (t: Throwable) {
                        Log.e("Font", "Couldn't load font $this", t)
                        Typeface.DEFAULT
                    }
//                }
            }
        }

        return typeface
    }

I keep getting "Outdated Kotlin Runtime" in Intellij IDEA. How can I update the Runtime? (the "Update Runtime" link given by the IDE just tells me that updating the runtime is not yet supported)

@dave08 http://beust.com/weblog/2015/10/30/exploring-the-kotlin-standard-library/

I've used

with

to scope extension functions/properties defined in an

object

, but thats about all

I struggle to attach kotlin sources in a Java/Kotlin mixed project (it works all fine in a pure Kotlin project). I clicked on download sources and javadoc in the maven window and I see them under Project Structure but it still isn't displayed properly. Any idea?

@elect Sorry, but I was incorrect. This works for me. The type of

cb

is indeed

Any

, but I can still access

framebufferSize

. This is in a JVM module (

apply plugin: 'kotlin'

) of a multi-platform project using Kotlin 1.2.10:

val cb = object {
    val framebufferSize = 1
}
println(cb.framebufferSize)

Hi, I'm new in Kotlin, I have to make a project with Kotlin and Spring framework 5. I would like if it was possible, that someone could give me any idea where I can to show the kotlin's power. Thank you very much

basically to get a bytearray from an input stream

SO the question is, Is it good to say that create constructors with default values is expensive because it must spent resources on defining the other instances and also carry on woth all definitions of the constructors

Is there a tracking page for Java 9 compatibility in kotlin, kotlin-compiler, and the Maven plugins? Wondering if I should be working around the various warnings, such as Illegal reflective access by com.intellij.util.text.StringFactory (file:kotlin-compiler-1.2.10.jar) to constructor java.lang.String(char[],boolean)

apply

returns the receiver while

with

returns the last expression of the block. Different uses.

Kotlin style guide recommends to use

==

instead of elvis operator for nullable booleans:

it?.equals(obj) ?: false || it == obj

->

it?.equals(obj) == true || it == obj

You could just simplify this all to

it == obj

- the only caveat is that if

it

and

obj

are both

null

- you'll get

true

. If that's not desired, then this would yield the same result as the original code

it != null && it == obj

I don't understand why the output is

0, 1, 4, 9, 16

.

val x: IntArray = intArrayOf(1, 2, 3)

val x = Array(3, {i -> i + 1})