myList.filterNotNull().filter { f(it) }

data class Person(
    val name: String = "",
)

null

name

enum class AdmininstrationReason {
  Prophy,
  StudyPlacebo,
  LightTherapy,
  DrinkingRelated, //<- We might want to display this as "Swallowing Disorders"
  Clotting,
  Other;
}

data class Foo(val bar: String)

Foo

sealed class Result<out T> {
  class Success<out T>(val value: T): Result<T>()
  class Failure<out T>(val error: MyError): Result<T>()

  fun orDefault(d: T): T = when (this) {
    is Success<T> -> this.value
    is Failure<T> -> d
  }
}

in

out

T

selection

[key=value, key=value, key=value]

val attributes = selection.replace("[(\\w+)]".toRegex(), "$1").replace("\\s+".toRegex(), "").split(',').associate { it.substringBefore('=') to it.substringAfter('=') }

fun main() {
    // fake key
    val key: String = "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"
    key.chunked(500) {
        write(it)
    }
}

suspend fun write(key: CharSequence) {
    // Write the key in order
}

interface Id : Comparable<Id> {
    val value: String
    
    override fun compareTo(other: Id): Int = value.compareTo(other.value)
    fun toString(): String = value
}

'toString' hides member of supertype 'Comparable' and needs 'override' modifier

Any

plugins {
    id("org.jetbrains.kotlin.jvm")
}

URL.readText()

close

The contents of a class should go in the following order:

Property declarations and initializer blocks

Secondary constructors

Method declarations

Companion object

data class Point(val x: Int, val y: Int)

Point

Point

val createEmail = {
            if (type == Type.ERROR) {
                dataProvider.createErrorEmail(id)
            }
        }

interface OpenRange<T : Comparable<T>> {
    val start: T?
    val endInclusive: T?
    operator fun contains(value: T): Boolean = (
        start?.let { value >= it }
            ?: true
        ) && (endInclusive?.let { value <= it } ?: true)
    fun isEmpty(): Boolean = start != null && endInclusive != null && (start!! > endInclusive!!)
}

operator fun LocalDateTime.rangeTo(other: LocalDateTime?) = object : OpenRange<LocalDateTime> {
    override val start: LocalDateTime = this@rangeTo
    override val endInclusive: LocalDateTime? = other
}

BufferedReader.forEachLine

last line\nEOF

last lineEOF

last line

Reader

mutableListOf

class Bus {

    private val persons = mutableSetOf<Person>()
    
    fun addPerson(persons: Person) {
        persons.add(person)
    }
}

value class

value

data class PhoneNumber(val normalized: String)

class Grid(val x:Int, val y: Int)

Grid.NONE

Grid

Grid