KOTLINCONF IS BACK : after the party

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੗೐݂֙ର ௏೐݂ѐਘର commit 543f02d23 Date: Sun Oct 10 19:34:30 2021
+0900 Add generated projects with spring and kotlin commit 226a51966 Date: Wed Oct 13 16:31:57 2021 +0900 Add Dockerfile and deploy manifest file commit 1d0525b88 Date: Wed Oct 13 18:31:41 2021 +0900 Make github actions commit 7476a1192 Date: Sat Oct 23 20:13:09 2021 +0900 Add servlet-filter based authentication processing commit 6390a5935 Date: Sat Oct 23 20:44:12 2021 +0900 Add meetup creation process and web-api ߅ਊӂ.apply { ࣗࣘ = "׼Ӕ݃௄" ౠ૚ = "݈ ݆਺, nߓࣘ ੤ࢤ" }

যցف ঠաف Github projects use Kotlin as their primary language
Increase in Multiplatform libraries in 2002 of Android users are satisfied with Kotlin of the top 1,000 Android apps use Jetpack Compose of all kotlin users are satisfied with Kotlin of the top 1,000 Android apps are in Kotlin 1M 86 95 60 97 23 of the all daangn projects use Multiplatform 1 of the all daangn projects use Kotlin 10

فߓ؊ࡅܲ,ஹ౵ੌ۞о ,PUMJOਵ۽ য়Ҋ੓যਃ https://techblog.woowahan.com/2532/

,ஹ౵ੌ۞ܳ݅ա۰ݶCVJMEHSBEMFLUTܳ଺ইоࣁਃ https://techblog.woowahan.com/2532/ // 1.8.20 ੉࢚ kotlin { sourceSets.all { languageSettings
{ languageVersion = "2.0" } } } // 1.8.0 ੉ೞ tasks.compileKotlin { kotlinOptions { useK2 = true } } tasks.compileTestKotlin { kotlinOptions { useK2 = true } } tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> { kotlinOptions { ... } } tasks.named("compileKotlin", org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile::class.java) { kotlinOptions { ... } } 4BNFBT

؊਌׳௓ೞҊ߄࢏ೠ࢜۽਍ޙߨ4ZOUBY ੉ળ࠺غҊ੓ؘਃ Explicit Fields Context Receivers Name Based Destructuring Collection
Literals Static Extensions

4UBUJD&YUFOTJPOT,5 val courses = File.readCSV(pathname = "inflearn/courses.csv") https://youtrack.jetbrains.com/issue/KT-11968

4UBUJD&YUFOTJPOT,5 val courses = File.readCSV(pathname = "inflearn/courses.csv") fun File.Companion.readCSV(pathname: String):
File { // processing } https://youtrack.jetbrains.com/issue/KT-11968

4UBUJD&YUFOTJPOT,5 val courses = File.readCSV(pathname = "inflearn/courses.csv") fun File.Companion.readCSV(pathname: String):
File { // processing } fun File.static.readCSV(pathname: String): File { // processing } https://youtrack.jetbrains.com/issue/KT-11968

&YQMJDJU'JFMET,5 class Meetup { val members: Set<Member> get() = _members.toSet()
private val _members = mutableSetOf<Member>() fun join(member: Member): Meetup { _members.add(member) return this } // methods }

&YQMJDJU'JFMET,5 class Meetup { val members: Set<Member> get() = _members.toSet()
private val _members = mutableSetOf<Member>() fun join(member: Member): Meetup { _members.add(member) return this } // methods } class Meetup { val member: Set<Member> field = mutableSetOf<Member>() // methods }

$POUFYU3FDFJWFST,5 fun processRequest(context: ServiceContext, request: ServiceRequest) { val payload =
request.loadPayload(context) // processing } context(ServiceContext) fun processRequest(request: ServiceRequest) { val payload = request.loadPayload() // processing } context(ServiceContext) fun ServiceRequest.loadPayload(): Payload { // returning payload }

/BNF#BTFE%FTUSVDUVSJOH,5 data class Person( val firstName: String, val lastName: String
) val (firstName, lastName) = Person("Brie", "Park")

/BNF#BTFE%FTUSVDUVSJOH,5 data class Person( val firstName: String, val lastName: String
) val (firstName, lastName) = Person("Brie", "Park") val (lastName, firstName) = Person("Heidi", "Oh")

$PMMFDUJPO-JUFSBMT,5 val courses = listOf("੗߄ ѐߊ੗ܳ ਤೠ ௏ౣܽ ੑޙ", "Jetpack
Compose ੑޙ")

$PMMFDUJPO-JUFSBMT,5 val courses = listOf("੗߄ ѐߊ੗ܳ ਤೠ ௏ౣܽ ੑޙ", "Jetpack
Compose ੑޙ") val courses = ["੗߄ ѐߊ੗ܳ ਤೠ ௏ౣܽ ੑޙ", "Jetpack Compose ੑޙ"] val scores = MutableSet [5.0, 4.8]

௏ౣܽ਷ݽٚ೒ۖಬਸ؀࢚ਵ۽࠺ૉפझ֤ܻܳҕਬ೧ਃ

<খҟҊ>௏ౣܽݣ౭೒ۖಬ੉ҾӘೞदભ https://www.inflearn.com/course/%EC%BD%94%ED%8B%80%EB%A6%B0-%EB%A9%80%ED%8B%B0%ED%94%8C%EB%9E%AB%ED%8F%BC

Ӿݣ౭೒ۖಬ੉ҍউ੿ചػؘਃ 2020 2021 2023 2024 2022

"OESPJE %FTLUPQਸֈযJ04 8FC੄৔৉ө૑$PNQPTFೞࣁਃ

@Composable internal fun GalleryScreen( galleryPage: GalleryPage, photoGallery: PhotoGallery, dependencies: Dependencies,
onClickPreviewPicture: (PictureData) -> Unit, onMakeNewMemory: () -> Unit ) { val pictures = dependencies.pictures var selected: PictureData by remember { mutableStateOf(pictures.first()) } LaunchedEffect(Unit) { ... } Column(modifier = Modifier.background(MaterialTheme.colorScheme.background)) { ... } ... } @Composable private fun SquaresGalleryView( images: List<PictureData>, selectedImage: PictureData, onSelect: (PictureData) -> Unit, ) { LazyVerticalGrid( modifier = Modifier.padding(top = 4.dp), columns = GridCells.Adaptive(minSize = 130.dp), verticalArrangement = Arrangement.spacedBy(1.dp), horizontalArrangement = Arrangement.spacedBy(1.dp) ) { ... } } ... $PNQPTF.VMUJQMBUGPSN6*೐ۨ੐ਕ௼ܳࣗѐೡѱਃ https://www.jetbrains.com/lp/compose-multiplatform/

8FC"TTFNCMZоޤջҳਃ https://blog.logrocket.com/webassembly-how-and-why-559b7f96cd71/ C , C or Kotlin, Rust...

ؘݽܳળ࠺೮૑݅അ੢ৈѤ੉ৈ੄஖ঋই੢಴৬৔࢚ਵ۽ࠁৈ٘۰ਃ ਫ਼द௏٘ખࠁ۞оपѱਃ

HSBEMFQSPQFSUJFT # Kotlin kotlin.code.style=official # MPP kotlin.mpp.stability.nowarn=true kotlin.mpp.enableCInteropCommonization=true kotlin.mpp.androidSourceSetLayoutVersion=2 #
Native kotlin.native.cacheKind=none kotlin.native.useEmbeddableCompilerJar=true kotlin.native.cocoapods.generate.wrapper=true kotlin.native.binary.memoryModel=experimental # Compose org.jetbrains.compose.experimental.uikit.enabled=true org.jetbrains.compose.experimental.macos.enabled=true org.jetbrains.compose.experimental.jscanvas.enabled=true # Android android.useAndroidX=true android.compileSdk=33 android.targetSdk=33 android.minSdk=24 # Versions jdk.version=11 kotlin.version=1.8.20 compose.version=1.4.0-dev-wasm06 ktor.version=2.3.0 agp.version=7.4.2

DPNNPOCVJMEHSBEMFLUT plugins { kotlin("multiplatform") kotlin("native.cocoapods") id("com.android.library") id("org.jetbrains.compose") } kotlin {
android() iosX64() iosArm64() iosSimulatorArm64() jvm("desktop") { ... } js(IR) { ... } wasm { ... } cocoapods { ... } sourceSets { val commonMain by getting { dependencies { implementation(compose.runtime) ... implementation("io.ktor:ktor-client-core:$ktorVersion") } } val commonTest by getting { ... } val androidMain by getting val androidInstrumentedTest by getting val iosMain by creating val desktopMain by getting val desktopTest by getting val wasmMain by getting val wasmTest by getting ... } } android { ... }

DPNNPOBQQMJDBUJPO(SFFUJOH0QFSBUJPOTLU package kotlinconf.application import kotlinconf.net.URI import kotlinconf.net.http.ClientHttpRequestFactory import kotlinconf.net.http.HttpMethod interface
GreetingOperations { fun greeting(username: String): String } class LocalGreetingOperations : GreetingOperations { override fun greeting(username: String): String { return "Hello, $username" } } class RemoteGreetingOperations( private val clientHttpRequestFactory: ClientHttpRequestFactory, private val serverSchema: String = "http", private val serverHost: String = "localhost", private val serverPort: Int = 8080, ) : GreetingOperations { override fun greeting(username: String): String { val request = clientHttpRequestFactory.createRequest( uri = URI.parse("$s..Schema://$s..Host:$s..Port$PATH?username=$username"), httpMethod = HttpMethod.GET() ) return request.execute().body.decodeToString() } companion object { private const val PATH = "/greeting" } }

DPNNPOVJ(SFFUJOH$PNQPTF"QQLU package kotlinconf.ui import androidx.compose..* import kotlinconf.application.GreetingOperations import kotlinconf.getPlatformName @Composable
fun GreetingComposeApp( greetingOperations: GreetingOperations, modifier: Modifier ) { val platformName = getPlatformName() Box(modifier = modifier, contentAlignment = Alignment.Center) { Column(modifier = Modifier.wrapContentSize()) { val greetingText = remember { mutableStateOf("Welcome...") } WriteBox( onSearchClicked = { username -> greetingText.value = try { greetingOperations.greeting(username = username) } catch (error: Throwable) { if (error.message == null) { "An unknown error occurred" } else { "Error: ${error.message?.lowercase()}" } } } ) TextPanel(text = greetingText) } } } @Composable private fun WriteBox(onSearchClicked: (String) -> Unit) { ... } @Composable private fun TextPanel(text: MutableState<String>) { ... }

TFSWFS4FSWFS"QQMJDBUJPOLU package kotlinconf import org.springframework.boot.autoconfigure.SpringBootApplication import org.springframework.boot.runApplication import org.springframework.context.support.beans import
org.springframework.web.servlet.config.annotation.CorsRegistry import org.springframework.web.servlet.config.annotation.WebMvcConfigurer @SpringBootApplication class ServerApplication fun main(args: Array<String>) { val applicationBeans = beans { } val webBeans = beans { bean { object : WebMvcConfigurer { override fun addCorsMappings(registry: CorsRegistry) { registry .addMapping("/**") .allowedOrigins("*") .allowedMethods("*") .allowedHeaders("*") } } } } runApplication<ServerApplication>(*args) { addInitializers(applicationBeans, webBeans) } }

TFSWFSXFC(SFFUJOH3FTU$POUSPMMFSLU package kotlinconf.web import kotlinconf.application.GreetingOperations import org.springframework.web.bind.annotation.GetMapping import org.springframework.web.bind.annotation.RequestParam import
org.springframework.web.bind.annotation.RestController @RestController class GreetingRestController : GreetingOperations { @GetMapping("/greeting") override fun greeting(@RequestParam("username") username: String): String { return "Hello, $username" } }

BOESPJE"OESPJE"QQMJDBUJPOLU package kotlinconf import android.os.Bundle import androidx.activity.compose.setContent import androidx.appcompat.app.AppCompatActivity import
androidx.compose.foundation.layout.fillMaxSize import androidx.compose.material.MaterialTheme import androidx.compose.ui.Modifier import kotlinconf.application.RemoteGreetingOperations import kotlinconf.net.http.DefaultClientHttpRequestFactory import kotlinconf.ui.GreetingComposeApp class AndroidApplication : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContent { MaterialTheme { GreetingComposeApp( greetingOperations = RemoteGreetingOperations( clientHttpRequestFactory = DefaultClientHttpRequestFactory(), serverHost = "10.0.2.2" ), modifier = Modifier.fillMaxSize() ) } } } }

EFTLUPQ%FTLUPQ"QQMJDBUJPOLU package kotlinconf import androidx.compose.foundation.layout.fillMaxSize import androidx.compose.ui.Modifier import androidx.compose.ui.window.Window import
androidx.compose.ui.window.application import kotlinconf.application.RemoteGreetingOperations import kotlinconf.net.http.DefaultClientHttpRequestFactory import kotlinconf.ui.GreetingComposeApp fun main() = application { Window(title = "Compose for Desktop", onCloseRequest = ::exitApplication) { GreetingComposeApp( greetingOperations = RemoteGreetingOperations( clientHttpRequestFactory = DefaultClientHttpRequestFactory() ), modifier = Modifier.fillMaxSize() ) } }

XFC8FC"QQMJDBUJPOLU package kotlinconf import androidx.compose.foundation.layout.fillMaxSize import androidx.compose.ui.ExperimentalComposeUiApi import androidx.compose.ui.Modifier import
androidx.compose.ui.window.CanvasBasedWindow import kotlinconf.application.RemoteGreetingOperations import kotlinconf.net.http.DefaultClientHttpRequestFactory import kotlinconf.ui.GreetingComposeApp @OptIn(ExperimentalComposeUiApi::class) fun main() { CanvasBasedWindow { GreetingComposeApp( greetingOperations = RemoteGreetingOperations( clientHttpRequestFactory = DefaultClientHttpRequestFactory() ), modifier = Modifier.fillMaxSize() ) } }

XFCJOEFYIUNM <!DOCTYPE html> <html lang="en"> <head> <title>Compose for Web with
WebAssembly</title> <script src="skiko.js"> </script> <script type="module" src="load.mjs"> </script> </head> <body> <canvas id="ComposeTarget"></canvas> </body> </html> --------------------------------------------------------------------------------------- # load.mjs import { instantiate } from './kotlinconf-is-back-web-wasm.uninstantiated.mjs'; await wasmSetup; instantiate({ skia: Module['asm'] });

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DPNNPOJPTNBJOJPTLU import androidx.compose.foundation.layout.fillMaxSize import androidx.compose.ui.Modifier import androidx.compose.ui.window.ComposeUIViewController import kotlinconf.application.RemoteGreetingOperations import
kotlinconf.net.http.DefaultClientHttpRequestFactory import kotlinconf.ui.GreetingComposeApp import platform.UIKit.UIViewController fun MainViewController() : UIViewController = ComposeUIViewController { GreetingComposeApp( greetingOperations = RemoteGreetingOperations( clientHttpRequestFactory = DefaultClientHttpRequestFactory(), serverHost = "127.0.0.1" ), modifier = Modifier.fillMaxSize() ) }

DPNNPOCVJMEHSBEMFLUT plugins { kotlin("multiplatform") kotlin("native.cocoapods") id("com.android.library") id("org.jetbrains.compose") } kotlin {
android() iosX64() iosArm64() iosSimulatorArm64() jvm("desktop") { ... } js(IR) { ... } wasm { ... } cocoapods { version = "1.0.0" summary = "common module for kotlinconf multiplatform apps" homepage = "https://kotlinconf.com/" ios.deploymentTarget = "14.1" podfile = project.file("../ios/Podfile") framework { baseName = "common" isStatic = true } extraSpecAttributes["resources"] = "['src/commonMain/resources/**']" } sourceSets { ... val iosMain by creating ... } } android { ... }

੉ઁCVJMEHSBEMFLUTܳݢ੷݅աࠁࣁਃ https://blog.gradle.org/kotlin-dsl-is-now-the-default-for-new-gradle-builds

,PUMJO௏٘ఐ࢝߂प೷ਸਤೠ؀ചഋਕ௼द౟ੋ௏ౣ֢ܽ౟࠘ਸࣗѐೡѱਃ https://plugins.jetbrains.com/plugin/16340-kotlin-notebook

(PPHMFß⃛ ,PUMJO 70 Google apps built and counting

௏ౣܽ੤ױ੉࢜۽਍धҳܳݏ੉೧ਃ

,PUMJO$POGীળ࠺ػ੉ঠӝࠁٮܻחޤо੓ਸөਃ <> -BOHVBHFBOE1SPHSBNNJOH <> .VMUJQMBUGPSNBOE$PNQPTF <>8FCBOE#BDLFOE <>&DPTZTUFN

ଵҊ੗ܐ KotlinConf 23 Keynote KotlinConf 2023 A Look at the
Opening Keynote

KOTLINCONF IS BACK : after the party

KOTLINCONF IS BACK : after the party

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