ArrayList<Model>

Model

Int

1 to 10

override fun fromJson(reader: JsonReader): Volumes? {
    val volumes = mutableListOf<Volume>()

    while (reader.hasNext()) {
        val path = reader.nextName()
        reader.skipValue()
        volumes.add(Volume(path))
    }

    return Volumes(volumes)
}

override fun toJson(writer: JsonWriter, value: Volumes?) {
    if(value == null) return
    writer.beginObject()
    for(volume in value.volumes) {
        writer.name(volume.path)
        writer.beginObject()
        writer.endObject()
    }
    writer.endObject()
}

/**
 * Adds a new item to a new list, returning the new list.
 * @param item the item to add to the list
 * @return A new list with `item` added to the end.
 */
private fun <T> List<T>.add(item: T): List<T> {
    val copy = this.toMutableList()
    copy.add(item)
    return copy
}

fun a(n: Int)=if (n/3-2 <= 0) 0 else n/3-2 + a(n/3-2)

Error:(107, 46) Kotlin: Type checking has run into a recursive problem. Easiest workaround: specify types of your declarations explicitly

fun foo(i: Int): String = ...
fun bar(i: Int): String by foo // does not work, is there another syntax?

val list= listOf<Int>(5,3,2,4,2)
println(list)
clear(list)
println(list)

list=emptyList()

kotlin-test

someObject.javaClass.kotlin.declaredMemberProperties

fun main() {
    var curr = listOf(1).asSequence()

    curr = curr.map { curr.sum() }

    println(curr.sum())
}

fun main() {
    var curr = listOf(1).asSequence()

    val done = curr.map { curr.sum() }

    println(done.sum())
}

sum

map

if

sealed class Foo

object Valid : Foo()
object Empty : Foo()

fun doSomething1(): Result<Foo> {
    return Result.failure<Valid>(Exception()).recover { if (true) Empty else Valid }
}

fun doSomething2(): Result<Foo> {
    return Result.failure<Valid>(Exception()).recover { Empty }
}

A problem occurred evaluating project ':kotlin.web.demo.backend'.
> Could not resolve all files for configuration ':versions:1.3.60:kotlinJS'.
   > Could not resolve org:Kotlin_KotlinRelease_1360_Aggregate:1.3.60-release-155.
     Required by:
         project :versions:1.3.60
      > Could not resolve org:Kotlin_KotlinRelease_1360_Aggregate:1.3.60-release-155.
         > Could not get resource '<https://buildserver.labs.intellij.net/guestAuth/repository/download/Kotlin_KotlinRelease_1360_Aggregate/1.3.60-release-155/teamcity-ivy.xml>'.
            > Could not GET '<https://buildserver.labs.intellij.net/guestAuth/repository/download/Kotlin_KotlinRelease_1360_Aggregate/1.3.60-release-155/teamcity-ivy.xml>'. Received status code 400 from server: Bad Request

<http://teamcity.jetbrains.com>

<https://buildserver.labs.intellij.net>

"{\"asdasdasdasd\": \"asd\"}"