if ((previous == null) or (previous.type == type)) {

previous

class Foo {
   Foo(String unhashedPassword) {
       this.hashedPassword = HashUtils.sha1(unhashedPassword)
    }
}

hasReceiver()

receiverType

receiverTypeId

const val CONFIG_FILE_NAME = "config.json"

httpClient.get<Type>(...): Type <------ return type is handled from reified generic parameter
  
  interface JsonSerializer {
    suspend fun read(type: KClass<*>, content: IncomingContent): Any   <<------ and handled type is used to instantiate object
}

interface Archievable {
    val status: ArchievedStatus
}
enum class ArchievedStatus { NEW, READY,ARCHIVED}
 ///and then
data calss User(val blabla, override val status: ArchievedStatus): Archievable 
data calss Company(val blabla, override val status: ArchievedStatus): Archievable 
///with definition of archiving i wan't to create single method that use copy method and work with 2 pojos

copy

listOf("a", "b", "c") + listOf("d", "e") = listOf("a", "d", "b", "e", c")

// source code
fun main(args: Array<String>) {
    val value: Int
    value = 3
}

// REPL
>>> val value: Int
error: property must be initialized or be abstract
val value: Int

myMutableMap.values.removeAll { <predicate> }

null

1

2

condition

listOf(1,2,3,4)

stream

condition

filter

stream

null

filter

null

if(condition != null) stream.filter(it == condition) else stream

stream.filter { condition == null || it == condition }

No class roots are found in the JDK path: /home/nkoval/jdk10-consol-proto/build/linux-x86_64-normal-server-release/jdk