খௗ͞Μͱ,PUMJOΛษڧͰ͖ΔαΠτΛ
,PUMJOͰ࡞Δ ʹ͜͠Γ͞ͿΖʙ
!TVCSPI@ 

ࣗݾ঺հ w ʹ͜͠Γ͞ͿΖʙ







ͱಉ͍೥
w גࣜձࣾ#FBS5BJM
w "OESPJEΤϯδχΞ ,PUMJO+BWB ˑ
w 8FCΤϯδχΞ 3BJMT3FBDU
w ୲౰
଎ਫ૗ɾࡾๆ݁՚ɾਅนਸ਼ر 5XJUUFS*%
!TVCSPI@ ˣ/&8 ϛϦUI෱Ԭʙ 

એ఻λΠϜ 0UPOBTIJ
w ,PUMJO੡41"32-ΫϥΠΞϯτ
w TVCSPIPUPOBTIJ ਫ୩ञ଄ʮઍත
૗ʯ
w ୲౰ͷ೔ຊञ
w ළͷ৭͕߹͍͗ͯ͢ޠኮྗࣦ͏☺ 

໨࣍ 
࡞ͬͨϞϊ঺հ
w খௗ͞Μͱ,PUMJOΛֶ΂ΔαΠτʮখௗ͞Μͷࣗशࣨʯ
w ੡࡞ͷϞνϕʔγϣϯ

࣮૷঺հ
w αʔόʔαΠυ ,UPS
w ϑϩϯτΤϯυ ,PUMJO+4

·ͱΊ 

ͦͷલʹʜ w ,PUMJOͱ͸
w +FU#SBJOT੡ɺ੩తܕ෇͚ͷΦϒδΣΫτࢦ޲ϓϩάϥϛϯάݴޠ
w +7.্Ͱಈ࡞ +BWBͱ4DBMBͷதؒʹҐஔ
w (PPHMF͕"OESPJEΞϓϦͷ։ൃݴޠͱͯ͠ਖ਼ࣜαϙʔτʂ
w ,PUMJO+4ɾ,PUMJO/BUJWF౳ɺΫϩεϓϥοτϑΥʔϜ։ൃʹ΋ରԠ 

,PUMJO͸͍͍ͧʜ Button button = …; button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Log.d("tag", "Clicked!") } }); ྫ
ϘλϯΛԡ͢ͱʮ$MJDLFEʯͱදࣔ "OESPJE

+BWB ˠΠϯλʔϑΣʔεఆ͕ٛ৑௕ 

,PUMJO͸͍͍ͧʜ val button: Button = ... button.setOnClickListener { v -> Log.d("tag", "Clicked!") } ྫ
ϘλϯΛԡ͢ͱʮ$MJDLFEʯͱදࣔ "OESPJE

,PUMJO ˠ4".ม׵ ΠϯλʔϑΣʔεఆٛΛϥϜμͰॻ͚Δ 

,PUMJO͸͍͍ͧʜ ྫ
ϦετΛηϛίϩϯͰܨ͛ͯେจࣈʹม׵ ˠҾ਺MJTUͷOVMMνΣοΫ͕໘౗ɺ๨Ε͕ͪ
ˠ๨ΕͨΒ࣮ߦ࣌Τϥʔ ԯͷσόΠεͰ૸ͬͯ٬ઌͰʜ String joinAndUpperCase(List list) { if (list == null) { return ""; } return String.join(":", list).toUpperCase(); } 

,PUMJO͸͍͍ͧʜ ྫ
ϦετΛηϛίϩϯͰܨ͛ͯେจࣈʹม׵ ˠ/VMMڐ༰ɾඇڐ༰Λʮ ʯͰ໌ࣔɺڐ༰ͷ৔߹ίϯύΠϧΤϥʔ
ˠʮMJTU KPJO5P4USJOH lz ʯͰ
ɹɹɹʮMJTU͕OVMMͷ࣌͸KPJO5P4USJOHΛ࣮ߦ͠ͳ͍ʯ fun joinAndUpperCase(list: List?): String { return list?.joinToString(":")?.toUpperCase() :? "" } γϯϓϧ͔࣮ͭ༻తͳจ๏Ͱʮ+BWBͭΒ͍ʯΛղܾʂɹͦΕ͕,PUMJOʂ 

࡞ͬͨ΋ͷ w খௗ͞Μͷࣗशࣨ
খௗ͞Μͱ,PUMJOΛֶ΂ΔαΠτ
w (JUIVC
TVCSPIPUPOBTIJLPUMJOEFW
w ػೳ
w ,PUMJOͷجૅతͳจ๏ղઆ
w 8FC্Ͱখௗ͞ΜͱϖΞϓϩάϥϛϯά͠ͳ͕Β,PUMJOΛษڧͰ͖Δʂ
w ,PUMJOΛษڧ͍ͨ͠খௗ͞ΜͱͷίϛϡΛָ͠ΊΔʂ 

0WFSWJFX 

0WFSWJFX w ,PUMJOͷ3&1-ίϯϙʔωϯτ
w +FU#SBJOTLPUMJOQMBZHSPVOE
w ࣗ༝ʹίʔυॻ͚Δɺ࣮ߦͰ͖Δ
w ࣮श՝୊

஬৯͍ঢ়ଶͷίʔυ
w ग़ྗ
w ඪ४ग़ྗ
PS
ίϯύΠϧΤϥʔ
w +6OJUͷςετ݁Ռ 

0WFSWJFX w খௗ͞Μͱͷձ࿩6*
w 3&1-͔Βฤूதͷίʔυ

ग़ྗΛऔಘ
w αʔόʔʹ౤͛ͯ༻ҙͨ͠୆ࢺΛදࣔ
w ਖ਼ղͷग़ྗʮͰ͖·ͨ͠ʂʯ
w Τϥʔʮؒҧ͑ͪΌ͍·ͨ͠ʜʯ
w ͱʹ͔͔͘Θ͍͍ʂʂʂʂʂʂʂʂ 

ͳͥ࡞Ζ͏ͱࢥͬͨ ,PUMJO࠷ߴʂɹ,PUMJO͔Θ͍͍ʂ ৽ن։ൃ͸,PUMJOҰ୒Ͱ͢ΑͶʔ αϯϓϧίʔυͰ͢ʔ ΄΅,PUMJO "OESPJE։ൃऀ %SPJE,BJHJ ,PUMJOϑΝʔετͰߦͧ͘!*0
 ,PUMJOΊͪΌͪ͘Ό޿͕͍ͬͯΔʂˠελʔτΞοϓɾϕϯνϟʔͷੈքݶఆͰ͸ 

ͳͥ࡞Ζ͏ͱࢥͬͨ ,PUMJO࠷ߴʂɹ,PUMJO͔Θ͍͍ʂ +BWBͰΑ͘ͳ͍ʁ ղઆຊগͳ͍Ͱ͢ΑͶʔ "OESPJE

,PUMJOॳΊͯ΍Δͱ
Ͳͬͪ΋෼͔Βͳͯͭ͘Β͍ ͦΕ͸ͦ͏ Ұา౿Έग़͠੾Εͳ͍ਓʹ΋
ʮ,PUMJO࠷ߴʂʯʮ,PUMJO͔Θ͍͍ʂʯΛ஌ͬͯ΄͍͠ʂ 

ͳͥ࡞Ζ͏ͱࢥͬͨ ͱΓ͋͑ͣখௗ͞Μͱʮ)FMMP
8PSMEʯͯ͠Έͨ
w Ṗͷ೤ҙͰશͯ,PUMJOͰ࣮૷
w ͔Θ͍͗ͨ͢ɹਓͰൃڰͨ͠
w 35͍͍Ͷ
w 1͚ͩͰͳ͘ɺ,PUMJOք۾ͷਓ͔Β΋͍͍൓Ԡ খௗ͞ΜͱͷϖΞϓϩ͠ͳ͕ΒษڧͰ͖ΔαΠτ
ׂͱधཁ͕͋Γͦ͏ʂɹ͋ͱ๻͕ΊͬͪΌָ͍͠ 

࣮૷ղઆ w αʔόʔαΠυ
w ,UPS
w ϑϩϯτΤϯυ
w w ,PUMJO+4
w LPUMJOQMBZHSPVOE
w SFBDISPVUFS w NBUFSJBMVJ
w SFBDUTXJQFBCMFWJFXT
w SFWFBMKT 

αʔόʔαΠυ w ,UPS
ܰྔɾγϯϓϧͳ8FCΞϓϦέʔγϣϯϑϨʔϜϫʔΫ
w ެࣜαΠτ
LUPSJP
w "1*αʔόʔͷ։ൃ͕؆୯ʹͰ͖Δ
w 3VCZͰ͍͏TJOBUSBɺ1ZUIPOͰ͍͏qBTLతͳཱͪҐஔ
w ௥ՃϞδϡʔϧ͕๛෋ɺඞཁͳ͚ͩ௥Ճͯ͠࢖͏ αʔόʔϩάػೳͱ͔ 

,UPSͰ)FMMP
8PSME w ,UPS
1SPKFDU
(FOFSBUPSͰϓϩδΣΫτͷεέϧτϯੜ੒ ͱΓ͋͑ͣͦͷ··#VJMEԡ͢ˠ[JQ͕߱ͬͯ͘ΔͷͰղౚ 

,UPSͰ)FMMP
8PSME w "QQMJDBUJPOLUʹϧʔςΟϯάͱϨεϙϯε௥ه fun main(args: Array): Unit = io.ktor.server.netty.EngineMain.main(args) @Suppress("unused") // Referenced in application.conf @kotlin.jvm.JvmOverloads fun Application.module(testing: Boolean = false) { routing { get("/") { call.respondText("Hello, World!”, ContentType.Text.Plain) } } } ίί 

,UPSͰ)FMMP
8PSME w HSBEMFX
SVOΛ࣮ߦˠMPDBMIPTUͰαʔόʔ্ཱ͕ͪΔ $ ./gradlew run Starting a Gradle Daemon, 1 busy and 1 stopped Daemons could not be reused, use --status for details > Task :compileKotlin … $ curl http://localhost:8080 Hello, World! ʻ
Ͱ͖·ͨ͠ʂ 

route("/api/v1") { @Location("/{section}/{task}/task_results") data class TaskResultsParams(val section: String, val task: String, val output: String, val status: String) get { params -> val result = TaskResultService.validate(...) call.respond(HttpStatusCode.OK, result) } @Location("/{section}/{task}/start_conversations") data class StartConversationsParams(val section: String, val task: String) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } @Location("/{section}/{task}/coding_conversations") data class CodingConversationsParams(val section: String, val task: String, val code: String?) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } } 

route("/api/v1") { @Location("/{section}/{task}/task_results") data class TaskResultsParams(val section: String, val task: String, val output: String, val status: String) get { params -> val result = TaskResultService.validate(...) call.respond(HttpStatusCode.OK, result) } @Location("/{section}/{task}/start_conversations") data class StartConversationsParams(val section: String, val task: String) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } @Location("/{section}/{task}/coding_conversations") data class CodingConversationsParams(val section: String, val task: String, val code: String?) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } } ඪ४ग़ྗͷ஋ʹର͢Δ
খௗ͞Μͷฦ౴Λฦ͢"1* 

route("/api/v1") { @Location("/{section}/{task}/task_results") data class TaskResultsParams(val section: String, val task: String, val output: String, val status: String) get { params -> val result = TaskResultService.validate(...) call.respond(HttpStatusCode.OK, result) } @Location("/{section}/{task}/start_conversations") data class StartConversationsParams(val section: String, val task: String) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } @Location("/{section}/{task}/coding_conversations") data class CodingConversationsParams(val section: String, val task: String, val code: String?) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } } ՝୊Λදࣔͨ͠௚ޙͷ
খௗ͞Μͷฦ౴Λฦ͢"1* 

route("/api/v1") { @Location("/{section}/{task}/task_results") data class TaskResultsParams(val section: String, val task: String, val output: String, val status: String) get { params -> val result = TaskResultService.validate(...) call.respond(HttpStatusCode.OK, result) } @Location("/{section}/{task}/start_conversations") data class StartConversationsParams(val section: String, val task: String) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } @Location("/{section}/{task}/coding_conversations") data class CodingConversationsParams(val section: String, val task: String, val code: String?) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } } ฤूதͷίʔυΛड͚ͯ
খௗ͞ΜͷಠΓݴΛฦ͢"1* 

route("/api/v1") { @Location("/{section}/{task}/task_results") data class TaskResultsParams(val section: String, val task: String, val output: String, val status: String) get { params -> val result = TaskResultService.validate(...) call.respond(HttpStatusCode.OK, result) } @Location("/{section}/{task}/start_conversations") data class StartConversationsParams(val section: String, val task: String) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } @Location("/{section}/{task}/coding_conversations") data class CodingConversationsParams(val section: String, val task: String, val code: String?) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } } ϦΫΤετύϥϝʔλʔʹର͢Δ
ܕόϦσʔγϣϯΛઃఆ 

route("/api/v1") { @Location("/{section}/{task}/task_results") data class TaskResultsParams(val section: String, val task: String, val output: String, val status: String) get { params -> val result = TaskResultService.validate(...) call.respond(HttpStatusCode.OK, result) } @Location("/{section}/{task}/start_conversations") data class StartConversationsParams(val section: String, val task: String) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } @Location("/{section}/{task}/coding_conversations") data class CodingConversationsParams(val section: String, val task: String, val code: String?) get { params -> val conversation = CodingConversationService.build(...) call.respond(HttpStatusCode.OK, conversation) } } ϞδϡʔϧΛ௥Ճ͢Δ͜ͱͰ
0CKFDUˠ+40/΁ͷϚοϐϯάΛ ͋Δఔ౓ ࣗಈԽ 

ϑϩϯτΤϯυ w ,PUMJO+4
,PUMJOΛ+BWBTDSJQUʹτϥϯεύΠε͢ΔϑϨʔϜϫʔΫ
w ඪ४ϥΠϒϥϦ
w ,PUMJOˠ+4ม׵ͷ(SBEMFϓϥάΠϯ LPUMJOKT
w OQN΍8FCQBDLͷίϚϯυΛ(SBEMFܦ༝Ͱ࣮ߦ͢ΔϓϥάΠϯ
LPUMJOGSPOUFOEQMVHJO ʻ
Կ΋Θ͔Βͳ͍Ͱ͢ʜ 

,PUMJO+4Ͳ͏࢖͏ͷ͔ w (SBEMFʹίϯύΠϧ΍8FCQBDLͷઃఆΛهड़ɺ8FCQBDLίϚϯυ࣮ߦ
w HSBEMFX
CVJME
ˠ
,PUMJOΛ+4ʹม׵

8FCQBDLͷόϯυϧग़ྗ
w HSBEMFX
SVO
ˠ
ม׵

όϯυϧग़ྗ

8FCQBDLαʔόʔ্ཱͪ͛
w ࠷ऴతͳ੒Ռ෺͕+4ϑΝΠϧʹͳΔ

+4ͷϥΠϒϥϦࢿ࢈Λར༻Մ ʻ
׬શʹཧղ͠·ͨ͠ʂ 

+BWBTDSJQU͡Όμϝͳͷʜʁ ͳͥΘ͟Θ͟,PUMJOΛ࢖͏ʁ ܕ҆શͰॻ͖͍ͨΜͰ͢ʂ
࢖͍׳Εͨ,PUMJOͰϑϩϯτ͍ͨ͠ΜͰ͢ʂ 5ZQF4DSJQUͰे෼ͩΖ͏ʁ
͋ͱ܅ɺۀ຿Ͱ3FBDU
3FEVY৮͍ͬͯΔ͠
+BWBTDSJQUॻ͚ΔͩΖ͏ʁ Θ͔Δʔʔʔ ɾТɾʆ ਖ਼௚εϐʔυͱ৘ใྔॏࢹͳΒ5ZQF4DSJQU͕࠷దղͩͱࢥ͏ʜ ຊԻ 

,PUMJO+4͡Όͳ͖ΌμϝͳΜͩ w ͔͠͠ɺখௗ͞Μͷࣗशࣨͷ৔߹ʜ
w ʮ΄΅શͯ,PUMJOͰ࡞ΒΕͨ,PUMJOษڧαΠτʯͰΞϐʔϧ͠΍͍͢ʂ
w ϓϩμΫγϣϯ؀ڥͰಈ࡞͢Δ,PUMJO+4ΞϓϦͷ࣮ྫʹͳΔʂ
w ,PUMJO+4ͷ࣮૷͕,PUMJOͷจ๏࢓༷Λ্खʹ࢖͍ͬͯͯษڧʹͳΔʂ
w খௗ͞Μ͕ΊͬͪΌتΜͰ͘ΕΔʂʂʂ ϞνϕʔγϣϯΛอͪ΍͍͢ 

ϑϩϯτΤϯυͷ࣮૷ w ౔୆͸3FBDU

3FBDI
3PVUFSʹΑΔ41"
w 6*ϑϨʔϜϫʔΫ͸.BUFSJBM6*Λར༻
w εϫΠϓ͢Δ6*͸SFBDUTXJQFBCMFWJFXΛར༻ 

ϑϩϯτΤϯυͷ࣮૷ w ίϛϡͷ6*͸SFWFBMKTΛར༻
w )5.-

$44ͰͷεϥΠυ࡞੒
w എܠʹNQQOHΛදࣔ
w ηϦϑ࿮͸ؤுͬͯ$44ͰτϨʔε
w ࡞ͬͨεϥΠυΛJGSBNFʹຒΊࠐΜͰදࣔ 

ϑϩϯτΤϯυͷ࣮૷ w Ͳ͏΍ͬͯ,PUMJOͰॻ͍ͯΔͷ
w 3FBDU
+FU#SBJOT͕ϥούʔϥΠϒϥϦΛఏڙ LPUMJOSFBDU class App extends React.Component { render() { return ( ) } } class App : RComponent() { override fun RBuilder.render() { div("title") { +"Welcome to React with Kotlin" } } } 3FBDU ,PUMJO+4 

ϑϩϯτΤϯυͷ࣮૷ w ͦͷଞ
!+T.PEVMFΞϊςʔγϣϯΛ࢖ͬͯ,PUMJOͷੈքʹΠϯϙʔτ
w ྫ
SFBDUTXJQFBCMFWJFXT @JsModule("react-swipeable-views") private external val reactSwipeableViewModule: dynamic fun test() { reactSwipeableViewModule.default.onChangeIndex = { ... } } +4ϥΠϒϥϦΛΠϯϙʔτ PO$IBOHF*OEFYʹ
ؔ਺ϦςϥϧΛ୅ೖ 

ϑϩϯτΤϯυͷ࣮૷ w ͦͷଞ
!+T.PEVMFΞϊςʔγϣϯΛ࢖ͬͯ,PUMJOͷੈքʹΠϯϙʔτ
w ྫ
SFBDUTXJQFBCMFWJFXT @JsModule("react-swipeable-views") private external val reactSwipeableViewModule: dynamic fun test() { reactSwipeableViewModule.default.onChangeIndex = { ... } } EZOBNJDܕʜʁ 

EZOBNJDܕͷ᠘ w EZOBNJD
,PUMJOͰ+4ͷΦϒδΣΫτΛͦͷ··ѻ͑Δܕ // { foo: 'foo', bar: { hoge: '111' } }をKotlinで扱う場合 val jsObject: dynamic = js("{ foo: 'foo', bar: { hoge: '111' } }") print(jsObject["foo"]) // => 'foo' print(jsObject["bar"]["hoge"]) // => 111 jsObject["aaa"]["bbb"] = "add from kotlin" print(jsObject["aaa"]["bbb"]) // => add from kotlin 

EZOBNJDܕͷ᠘ w EZOBNJD
,PUMJOͰ+4ͷΦϒδΣΫτΛͦͷ··ѻ͑Δܕ // { foo: 'foo', bar: { hoge: '111' } }をKotlinで扱う場合 val jsObject: dynamic = js("{ foo: 'foo', bar: { hoge: '111' } }") print(jsObject["foo"]) // => 'foo' print(jsObject["bar"]["hoge"]) // => 111 jsObject["aaa"]["bbb"] = "add from kotlin" print(jsObject["aaa"]["bbb"]) // => add from kotlin KT ʜ ϝιου
,PUMJOίʔυதʹੜͷ+4ίʔυΛ௚઀ॻ͚Δϝιου 

EZOBNJDܕͷ᠘ w EZOBNJD
,PUMJOͰ+4ͷΦϒδΣΫτΛͦͷ··ѻ͑Δܕ // { foo: 'foo', bar: { hoge: '111' } }をKotlinで扱う場合 val jsObject: dynamic = js("{ foo: 'foo', bar: { hoge: '111' } }") print(jsObject["foo"]) // => 'foo' print(jsObject["bar"]["hoge"]) // => 111 jsObject["aaa"]["bbb"] = "add from kotlin" print(jsObject["aaa"]["bbb"]) // => add from kotlin ଘࡏ͢ΔΩʔͷ஋Λऔͬͯ͘Δ 

EZOBNJDܕͷ᠘ w EZOBNJD
,PUMJOͰ+4ͷΦϒδΣΫτΛͦͷ··ѻ͑Δܕ // { foo: 'foo', bar: { hoge: '111' } }をKotlinで扱う場合 val jsObject: dynamic = js("{ foo: 'foo', bar: { hoge: '111' } }") print(jsObject["foo"]) // => 'foo' print(jsObject["bar"]["hoge"]) // => 111 jsObject["aaa"]["bbb"] = "add from kotlin" print(jsObject["aaa"]["bbb"]) // => add from kotlin ଘࡏ͠ͳ͍Ωʔͷ஋Λ
+4ʹ͍ۙจ๏Ͱ୅ೖͰ͖ͯ͠·͏ 

EZOBNJDܕͷ᠘ w EZOBNJD
,PUMJOͰ+4ͷΦϒδΣΫτΛͦͷ··ѻ͑Δܕ // { foo: 'foo', bar: { hoge: '111' } }をKotlinで扱う場合 val jsObject: dynamic = js("{ foo: 'foo', bar: { hoge: '111' } }") print(jsObject["foo"]) // => 'foo' print(jsObject["bar"]["hoge"]) // => 111 jsObject["aaa"]["bbb"] = "add from kotlin" print(jsObject["aaa"]["bbb"]) // => add from kotlin ΍ͩʜมͩͶ
,PUMJOΛɺ,PUMJOΛॻ͍ͯͨ͸ͣͳͷʹʜ
͍͔ͭΒ+BWBTDSJQUॻ͍ͯͨΜͩΖ͏ʜ
ʜͰ΋ʜࢲʜͨͩʜࢲʜΈΜͳͱʜ 

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