{"id":34043,"date":"2020-04-13T09:55:35","date_gmt":"2020-04-13T00:55:35","guid":{"rendered":"https:\/\/blog.jetbrains.com\/kr\/?p=711"},"modified":"2020-04-13T09:55:35","modified_gmt":"2020-04-13T00:55:35","slug":"kotlin-1-4-m1","status":"publish","type":"post","link":"https:\/\/blog.jetbrains.com\/ko\/2020\/04\/13\/kotlin-1-4-m1\/","title":{"rendered":"Kotlin 1.4-M1 \ucd9c\uc2dc\ub418\uc5c8\uc2b5\ub2c8\ub2e4"},"content":{"rendered":"\uc0c8 \uc8fc\uc694 \ub9b4\ub9ac\uc2a4\uc758 \uccab \ubc88\uc9f8 \ud14c\uc2a4\ud2b8 \ubc84\uc804\uc778 Kotlin 1.4-M1 \uc18c\uc2dd\uc744 \uc804\ud574\ub4dc\ub9bd\ub2c8\ub2e4.\r\n\uba87\ub2ec \uc804 \uc800\ud76c\ub294 Kotlin 1.4\uc5d0\uc11c \uae30\ub300\ud560 \uc0ac\ud56d\uc5d0 \uad00\ud574 \uc54c\ub824 \ub4dc\ub838\uc5c8\uc2b5\ub2c8\ub2e4. \uc774\uc81c \ucd9c\uc2dc\uac00 \ub2e4\uac00\uc634\uc5d0 \ub530\ub77c \uc0ac\uc6a9\uc790\uac00 \uc77c\ubd80 \uc0c8\ub85c\uc6b4 \uae30\ub2a5\uc744 \uc9c1\uc811 \uc0ac\uc6a9\ud574 \ubcfc \uc218 \uc788\ub294 \ud14c\uc2a4\ud2b8 \ubc84\uc804\uc744 \uc81c\uacf5\ud558\ub824 \ud569\ub2c8\ub2e4.\r\n\r\n\uc774 \uae00\uc5d0\uc11c\ub294 1.4-M1\uc5d0 \uc81c\uacf5\ub418\ub294 \ub2e4\uc74c\uc758 \uc0c8\ub85c\uc6b4 \uae30\ub2a5 \ubc0f \uc8fc\uc694 \uac1c\uc120 \uc0ac\ud56d\uc744 \uc8fc\uc694 \ub0b4\uc6a9\uc73c\ub85c \uc18c\uac1c\ud569\ub2c8\ub2e4.\r\n\r\n\ub354 \uac15\ub825\ud558\uace0 \uc0c8\ub85c\uc6b4 \uc720\ud615 \ucd94\ub860 \uc54c\uace0\ub9ac\uc998\uc774 \uae30\ubcf8\uc801\uc73c\ub85c \ud65c\uc131\ud654\ub429\ub2c8\ub2e4.\r\n\uc774\uc81c final \uba64\ubc84 \ud568\uc218\uc5d0\uc11c Contracts\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\nKotlin\/JVM \ucef4\ud30c\uc77c\ub7ec\uac00 Java 8 \uc774\ud6c4 \ubc84\uc804 \ub300\uc0c1\uc758 \ubc14\uc774\ud2b8\ucf54\ub4dc\uc5d0\uc11c \uc720\ud615 \uc5b4\ub178\ud14c\uc774\uc158\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4.\r\nKotlin\/JS\uc6a9 \ubc31\uc5d4\ub4dc\uac00 \uc0c8\ub85c \ucd94\uac00\ub418\uc5b4, \uc544\ud2f0\ud329\ud2b8 \uacb0\uacfc\uac00 \ud06c\uac8c \uac1c\uc120\ub429\ub2c8\ub2e4.\r\n\ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc758 \ud601\uc2e0\uc801\uc778 \ubcc0\uacbd \uc0ac\ud56d: \uc0ac\uc6a9 \uc911\ub2e8 \uc8fc\uae30\ub97c \uc885\ub8cc\ud558\uace0 \uc77c\ubd80 \ucd94\uac00\uc801 \ubd80\ubd84\uc744 \uc0ac\uc6a9 \uc911\ub2e8\ud588\uc2b5\ub2c8\ub2e4.\r\n\r\n\uc804\uccb4 \ubcc0\uacbd \ubaa9\ub85d\uc740 \ubcc0\uacbd \ub85c\uadf8\uc5d0\uc11c \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc5b8\uc81c\ub098 \uadf8\ub807\ub4ef\uc774 \uc678\ubd80 \uae30\uc5ec\uc790\ub4e4\uaed8 \uc9c4\uc2ec\uc73c\ub85c \uac10\uc0ac\uc758 \ub9d0\uc500\uc744 \uc804\ud569\ub2c8\ub2e4.\r\n\uc5ec\ub7ec\ubd84\ub4e4\uc774 \ud14c\uc2a4\ud2b8 \ubc84\uc804\uc744 \uc0ac\uc6a9\ud574 \ubcf4\uc2dc\uae30\ub97c \uc801\uadf9 \uad8c\uc7a5\ud558\uba70 \uc774\uc288 \ud2b8\ub798\ucee4\uc5d0\uc11c \uc758\uacac\uc744 \ub0a8\uaca8\uc8fc\uc2dc\uba74 \uac10\uc0ac\ud558\uaca0\uc2b5\ub2c8\ub2e4.\r\n\r\n\ub354 \uac15\ub825\ud574\uc9c4 \uc720\ud615 \ucd94\ub860 \uc54c\uace0\ub9ac\uc998\r\nKotlin 1.4\ub294 \ub354 \uac15\ub825\ud574\uc9c4 \uc0c8\ub85c\uc6b4 \uc720\ud615 \ucd94\ub860 \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. Kotlin 1.3\uc5d0\uc11c\ub294 \uc774 \uc0c8\ub85c\uc6b4 \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud558\uae30 \uc704\ud574 \ucef4\ud30c\uc77c\ub7ec \uc635\uc158\uc744 \uc9c0\uc815\ud574\uc57c \ud588\uc9c0\ub9cc \uc774\uc81c\ub294 \uae30\ubcf8\uc801\uc73c\ub85c \uc0ac\uc6a9 \uc124\uc815\ub429\ub2c8\ub2e4. \uc0c8 \uc54c\uace0\ub9ac\uc998\uc5d0\uc11c \uc218\uc815\ub41c \ubb38\uc81c\uc758 \uc804\uccb4 \ubaa9\ub85d\uc740 YouTrack\uc5d0\uc11c \ud655\uc778\ud558\uc2e4 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \ube14\ub85c\uadf8 \uac8c\uc2dc\ubb3c\uc5d0\uc11c\ub294 \uac00\uc7a5 \ub208\uc5d0 \ub744\ub294 \uac1c\uc120 \uc0ac\ud56d \uc911 \uc77c\ubd80\ub97c \uc8fc\uc694 \ub0b4\uc6a9\uc73c\ub85c \uc18c\uac1c\ud558\uaca0\uc2b5\ub2c8\ub2e4.\r\nKotlin \ud568\uc218 \ubc0f \uc778\ud130\ud398\uc774\uc2a4\uc5d0 \ub300\ud55c SAM \ubcc0\ud658\r\n\ud558\ub098\uc758 \"\ub2e8\uc77c \ucd94\uc0c1 \uba54\uc18c\ub4dc\"\uac00 \uc788\ub294 \uc778\ud130\ud398\uc774\uc2a4\uac00 \uc608\uc0c1\ub420 \ub54c SAM \ubcc0\ud658\uc744 \ud1b5\ud574 \ub78c\ub2e4\ub97c \uc804\ub2ec\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uc804\uc5d0\ub294 Kotlin\uc758 Java \uba54\uc18c\ub4dc \ubc0f Java \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc791\uc5c5\ud560 \ub54c\ub9cc SAM \ubcc0\ud658\uc744 \uc801\uc6a9\ud560 \uc218 \uc788\uc5c8\uc9c0\ub9cc \uc774\uc81c Kotlin \ud568\uc218 \ubc0f \uc778\ud130\ud398\uc774\uc2a4\uc5d0\uc11c\ub3c4 SAM \ubcc0\ud658\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\nKotlin\uc740 Kotlin \uc778\ud130\ud398\uc774\uc2a4\uc5d0 \ub300\ud55c SAM \ubcc0\ud658\uc744 \uc9c0\uc6d0\ud569\ub2c8\ub2e4. \ub2e8, Java\uc5d0\uc11c\uc640 \ub2ec\ub9ac \ud568\uc218 \uc778\ud130\ud398\uc774\uc2a4\ub97c \uba85\uc2dc\uc801\uc73c\ub85c \ud45c\uc2dc\ud574\uc57c \ud569\ub2c8\ub2e4. \ub2e4\uc74c\uacfc \uac19\uc774 fun \ud0a4\uc6cc\ub4dc\ub85c \uc778\ud130\ud398\uc774\uc2a4\ub97c \ud45c\uc2dc\ud55c \ud6c4 \uc778\ud130\ud398\uc774\uc2a4\uac00 \ub9e4\uac1c\ubcc0\uc218\ub85c \uc608\uc0c1\ub420 \ub54c\ub9c8\ub2e4 \ub78c\ub2e4\ub97c \uc778\uc218\ub85c \uc804\ub2ec\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\r\nfun interface Action {\r\n    fun run()\r\n}\r\n\r\nfun runAction(a: Action) = a.run()\r\n\r\nfun main() {\r\n    runAction {\r\n        println("Hello, Kotlin 1.4!")\r\n    }\r\n}\r\n\r\n\uc774\uc5d0 \ub300\ud55c \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 \uc774\uc804 \ube14\ub85c\uadf8 \uae00\uc5d0\uc11c \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\uc0ac\uc2e4 Kotlin\uc740 \ucc98\uc74c\ubd80\ud130 Java \uc778\ud130\ud398\uc774\uc2a4\uc5d0 \ub300\ud55c SAM \ubcc0\ud658\uc744 \uc9c0\uc6d0\ud588\uc9c0\ub9cc \uc9c0\uc6d0\ub418\uc9c0 \uc54a\ub294 \ud55c \uac00\uc9c0 \uacbd\uc6b0\uac00 \uc788\uc5c8\uae30 \ub54c\ubb38\uc5d0 \uae30\uc874 Java \ub77c\uc774\ube0c\ub7ec\ub9ac\ub85c \uc791\uc5c5\ud560 \ub54c \uc131\uac00\uc2e4 \ub54c\uac00 \ub54c\ub54c\ub85c \uc788\uc5c8\uc2b5\ub2c8\ub2e4. 2\uac1c\uc758 SAM \uc778\ud130\ud398\uc774\uc2a4\ub97c \ub9e4\uac1c\ubcc0\uc218\ub85c \uc0ac\uc6a9\ud558\ub294 Java \uba54\uc18c\ub4dc\ub97c \ud638\ucd9c\ud55c \uacbd\uc6b0 \ub450 \uc778\uc218\ub294 \ubaa8\ub450 \ub78c\ub2e4\uc774\uac70\ub098 \uc77c\ubc18 \uac1d\uccb4\uc5ec\uc57c \ud569\ub2c8\ub2e4. \uc989, \ud558\ub098\uc758 \uc778\uc218\ub97c \ub78c\ub2e4\ub85c \uc804\ub2ec\ud558\uace0 \ub2e4\ub978 \uc778\uc218\ub97c \uac1d\uccb4\ub85c \uc804\ub2ec\ud560 \uc218 \uc5c6\uc5c8\uc2b5\ub2c8\ub2e4. \uc0c8\ub85c\uc6b4 \uc54c\uace0\ub9ac\uc998\uc5d0\uc11c\ub294 \uc774 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uc5ec, \uc5b4\ub5a0\ud55c \uacbd\uc6b0\uc5d0\ub3c4 SAM \uc778\ud130\ud398\uc774\uc2a4 \ub300\uc2e0 \ub78c\ub2e4\ub97c \uc804\ub2ec\ud560 \uc218 \uc788\uc73c\uba70 \uc774\ub294 \uc5ec\ub7ec\ubd84\ub4e4\uc774 \uc790\uc5f0\uc2a4\ub7fd\uac8c \uc791\ub3d9\ud560 \uac83\uc774\ub77c\uace0 \uae30\ub300\ud558\ub294 \ubc29\uc2dd\uc77c \uac83\uc785\ub2c8\ub2e4. \r\n\ub2e4\uc591\ud55c \uc0ac\uc6a9 \uc0ac\ub840\uc5d0\uc11c \uc790\ub3d9\uc73c\ub85c \uc720\ud615 \ucd94\ub860\r\n\uc0c8\ub85c\uc6b4 \ucd94\ub860 \uc54c\uace0\ub9ac\uc998\uc740 \uc608\uc804 \ucd94\ub860\uc5d0\uc11c \uc0ac\uc6a9\uc790\uac00 \uba85\uc2dc\uc801\uc73c\ub85c \uc720\ud615\uc744 \uc9c0\uc815\ud574\uc57c \ud588\ub358 \ub2e4\uc591\ud55c \uc0ac\ub840\uc5d0\uc11c \uc720\ud615\uc744 \ucd94\ub860\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \ub2e4\uc74c \uc608\uc2dc\uc5d0\uc11c \ub78c\ub2e4 \ub9e4\uac1c\ubcc0\uc218 it\uc758 \uc720\ud615\uc740 String?\uc73c\ub85c \uc62c\ubc14\ub974\uac8c \ucd94\ub860\ub429\ub2c8\ub2e4.\r\n\r\n\/\/sampleStart\r\nval rulesMap: Map<String, (String?) -> Boolean> = mapOf(\r\n    "weak" to { it != null },\r\n    "medium" to { !it.isNullOrBlank() },\r\n    "strong" to { it != null && "^[a-zA-Z0-9]+$".toRegex().matches(it) }\r\n)\r\n\/\/sampleEnd\r\n\r\nfun main() {\r\n    println(rulesMap.getValue("weak")("abc!"))\r\n    println(rulesMap.getValue("strong")("abc"))\r\n    println(rulesMap.getValue("strong")("abc!"))\r\n}\r\n\r\nKotlin 1.3\uc5d0\uc11c\ub294 \uba85\uc2dc\uc801\uc778 \ub78c\ub2e4 \ub9e4\uac1c\ubcc0\uc218\ub97c \uc0bd\uc785\ud558\uac70\ub098 to\ub97c \uba85\uc2dc\uc801\uc778 \uc81c\ub124\ub9ad \uc778\uc218\uac00 \uc788\ub294 Pair \uc0dd\uc131\uc790\ub85c \uad50\uccb4\ud574\uc57c \ucd94\ub860\ub418\uc5c8\uc2b5\ub2c8\ub2e4.\r\n\ub78c\ub2e4\uc758 \ub9c8\uc9c0\ub9c9 \ud45c\ud604\uc2dd\uc744 \uc704\ud55c \uc2a4\ub9c8\ud2b8 \ud615 \ubcc0\ud658 (Smart casts)\r\nKotlin 1.3\uc5d0\uc11c \ub78c\ub2e4 \ub0b4\ubd80\uc758 \ub9c8\uc9c0\ub9c9 \ud45c\ud604\uc2dd\uc740 \uae30\ub300 \uc720\ud615\uc744 \uc9c0\uc815\ud558\uc9c0 \uc54a\uc73c\uba74 \uc2a4\ub9c8\ud2b8 \ud615 \ubcc0\ud658\uc774 \ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c \ub2e4\uc74c \uc608\uc2dc\uc5d0\uc11c Kotlin 1.3\uc740 String?\uc744 result \ubcc0\uc218\uc758 \uc720\ud615\uc73c\ub85c \ucd94\ub860\ud569\ub2c8\ub2e4.\r\n\r\nval result = run {\r\n    var str = currentValue()\r\n    if (str == null) {\r\n        str = "test"\r\n    }\r\n    str \/\/ the Kotlin compiler knows that str is not null here\r\n}\r\n\/\/ The type of 'result' is String? Kotlin 1.3\uc758 \uacbd\uc6b0 \ubc0f Kotlin 1.4\uc758 String\r\n\r\nKotlin 1.4\uc5d0\uc11c\ub294 \uc0c8\ub85c\uc6b4 \ucd94\ub860 \uc54c\uace0\ub9ac\uc998 \ub355\ubd84\uc5d0 \ub78c\ub2e4 \ub0b4\ubd80\uc758 \ub9c8\uc9c0\ub9c9 \ud45c\ud604\uc2dd\uc774 \uc2a4\ub9c8\ud2b8 \ud615 \ubcc0\ud658\ub418\uace0 \uc774 \ub354 \uc815\ud655\ud55c \uc0c8 \uc720\ud615\uc774 \uacb0\uacfc \ub78c\ub2e4 \uc720\ud615\uc744 \ucd94\ub860\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ub530\ub77c\uc11c result \ubcc0\uc218\uc758 \uc720\ud615\uc740 String\uc774 \ub429\ub2c8\ub2e4.\r\nKotlin 1.3\uc5d0\uc11c\ub294 \uc774\ub7ec\ud55c \uacbd\uc6b0 \ud615 \ubcc0\ud658\uc774 \uc791\ub3d9\ud558\ub3c4\ub85d \uba85\uc2dc\uc801 \ud615 \ubcc0\ud658(!! \ub610\ub294 as String\uacfc \uac19\uc740 \ud615 \ubcc0\ud658)\uc744 \uc885\uc885 \ucd94\uac00\ud574\uc57c \ud588\uc9c0\ub9cc \uc774\uc81c \uc774\ub7ec\ud55c \ud615 \ubcc0\ud658\uc774 \ud544\uc694 \uc5c6\uc5b4\uc84c\uc2b5\ub2c8\ub2e4.\r\n\ud638\ucd9c \uac00\ub2a5\ud55c \ucc38\uc870\uc5d0 \ub300\ud55c \uc2a4\ub9c8\ud2b8 \ud615 \ubcc0\ud658\r\nKotlin 1.3\uc5d0\uc11c\ub294 \uc2a4\ub9c8\ud2b8 \ud615 \ubcc0\ud658 \uc720\ud615\uc758 \uba64\ubc84 \ucc38\uc870\uc5d0 \uc561\uc138\uc2a4\ud560 \uc218 \uc5c6\uc5c8\uc2b5\ub2c8\ub2e4. \uc774\uc81c \ub2e4\uc74c\uc744 \uc218\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\r\nsealed class Animal\r\nclass Cat : Animal() {\r\n    fun meow() {\r\n        println("meow")\r\n    }\r\n}\r\n\r\nclass Dog : Animal() {\r\n    fun woof() {\r\n        println("woof")\r\n    }\r\n}\r\n\r\n\/\/sampleStart\r\nfun perform(animal: Animal) {\r\n    val kFunction: KFunction<*> = when (animal) {\r\n        is Cat -> animal::meow\r\n        is Dog -> animal::woof\r\n    }\r\n    kFunction.call()\r\n}\r\n\/\/sampleEnd\r\n\r\nfun main() {\r\n    perform(Cat())\r\n}\r\n\r\n\ub3d9\ubb3c \ubcc0\uc218\uac00 \ud2b9\uc815 \uc720\ud615, Cat \ubc0f Dog\ub85c \uc2a4\ub9c8\ud2b8 \ud615 \ubcc0\ud658\ub418\uba74 \ub2e4\ub978 \uba64\ubc84 \ucc38\uc870\uc778 animal::meow \ubc0f animal::woof\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \uc720\ud615 \uac80\uc0ac\uac00 \ub05d\ub098\uba74 \ud558\uc704 \uc720\ud615\uc5d0 \ud574\ub2f9\ud558\ub294 \uba64\ubc84 \ucc38\uc870\uc5d0 \uc561\uc138\uc2a4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\ud638\ucd9c \uac00\ub2a5\ud55c \ucc38\uc870\uc5d0 \ub300\ud55c \ucd94\ub860 \ud5a5\uc0c1\r\n\uae30\ubcf8 \uc778\uc218\uac12\uc744 \uac00\uc9c4 \ud568\uc218\uc5d0 \ub300\ud55c \ud638\ucd9c \uac00\ub2a5\ud55c \ucc38\uc870\ub97c \ub354 \ud3b8\ub9ac\ud558\uac8c \uc0ac\uc6a9\ud560 \uc218 \uc788\uac8c \ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \ub2e4\uc74c foo \ud568\uc218\uc5d0 \ub300\ud574 \ud638\ucd9c \uac00\ub2a5\ud55c \ucc38\uc870\ub294 \ud558\ub098\uc758 Int \uc778\uc218\ub97c \uc0ac\uc6a9\ud558\uac70\ub098 \uc778\uc218\ub97c \uc0ac\uc6a9\ud558\uc9c0 \uc54a\ub294 \uac83\uc73c\ub85c \ud574\uc11d\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\r\nfun foo(i: Int = 0): String = "$i!"\r\n\r\nfun apply1(func: () -> String): String = func()\r\nfun apply2(func: (Int) -> String): String = func(42)\r\n\r\nfun main() {\r\n    println(apply1(::foo))\r\n    println(apply2(::foo))\r\n}\r\n\r\n\uc704\uc784\ub41c \uc18d\uc131\uc5d0 \ub300\ud55c \ucd94\ub860 \ud5a5\uc0c1\r\n\uc704\uc784\ub41c \uc18d\uc131\uc758 \uc720\ud615\uc740 by \ud0a4\uc6cc\ub4dc\ub97c \ub530\ub974\ub294 \uc704\uc784 \ud45c\ud604\uc2dd\uc744 \ubd84\uc11d\ud558\ub294 \ub3d9\uc548\uc5d0\ub294 \uace0\ub824\ub418\uc9c0 \uc54a\uc558\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \ub2e4\uc74c \ucf54\ub4dc\ub294 \uc774\uc804\uc5d0 \ucef4\ud30c\uc77c\ub418\uc9c0 \uc54a\uc558\uc9c0\ub9cc \uc774\uc81c \ucef4\ud30c\uc77c\ub7ec\uac00 old \ubc0f new \ub9e4\uac1c\ubcc0\uc218\uc758 \uc720\ud615\uc744 String?\uc73c\ub85c \uc62c\ubc14\ub974\uac8c \ucd94\ub860\ud569\ub2c8\ub2e4.\r\n\r\nimport kotlin.properties.Delegates\r\n\r\nfun main() {\r\n    var prop: String? by Delegates.observable(null) { p, old, new ->\r\n        println("$old \u2192 $new")\r\n    }\r\n    prop = "abc"\r\n    prop = "xyz"\r\n}\r\n\r\n\uc5b8\uc5b4 \uad00\ub828 \ubcc0\uacbd \ub0b4\uc6a9\r\n\ub2e4\uc74c\uacfc \uac19\uc740 \ub300\ubd80\ubd84\uc758 \uc5b8\uc5b4 \ubcc0\uacbd \ub0b4\uc6a9\uc740 \uc774\uc804 \ube14\ub85c\uadf8 \uae00\uc5d0\uc11c \uc124\uba85\ud588\uc2b5\ub2c8\ub2e4.\r\n\r\nKotlin \ud074\ub798\uc2a4\uc758 SAM \ubcc0\ud658\r\n\uba85\uba85\ub41c \uc778\uc218 \ubc0f \ud3ec\uc9c0\uc154\ub110 \uc778\uc218\uc758 \ud63c\ud569\r\n\ucd5c\uc801\ud654\ub41c \uc704\uc784\ub41c \uc18d\uc131\r\nTrailing Commas\r\nwhen \ub0b4\uc758 break \ubc0f continue\r\n\uaf2c\ub9ac \uc7ac\uadc0\uc801(tail-recursive) \ud568\uc218\uc758 \ubcc0\uacbd\r\n\r\n\uc774 \uae00\uc5d0\uc11c\ub294 \uc18c\uc18c\ud55c \uba87\uac00\uc9c0 \uac1c\uc120 \uc0ac\ud56d\uc744 \uc911\uc810\uc801\uc73c\ub85c \uc18c\uac1c\ud558\uaca0\uc2b5\ub2c8\ub2e4.\r\nContracts \uc9c0\uc6d0\r\n\uc0ac\uc6a9\uc790 \uc9c0\uc815 contracts\ub97c \uc815\uc758\ud558\ub294 \uad6c\ubb38\uc740 \uc5ec\uc804\ud788 \uc2e4\ud5d8\uc801 \uc0c1\ud0dc\uc774\uc9c0\ub9cc  contracts\uac00 \ub3c4\uc6c0\uc774 \ub420 \uc218 \uc788\ub294 \uba87\uac00\uc9c0 \uc0c8\ub85c\uc6b4 \uc0ac\ub840\ub97c \uc9c0\uc6d0\ud574 \uc654\uc2b5\ub2c8\ub2e4.\r\n\uc774\uc81c\ub294 \uad6c\uccb4\ud654\ub41c \uc81c\ub124\ub9ad \uc720\ud615 \ub9e4\uac1c\ubcc0\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec contract\ub97c \uc815\uc758\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4 assertIsInstance \ud568\uc218\uc5d0 \ub300\ud574 \ub2e4\uc74c contract\ub97c \uad6c\ud604\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\r\n@OptIn(ExperimentalContracts::class)\r\ninline fun <reified T> assertIsInstance(value: Any?) {\r\n    contract {\r\n        returns() implies (value is T)\r\n    }\r\n\r\n    assertTrue(value is T)\r\n}\r\n\r\nT \uc720\ud615 \ub9e4\uac1c\ubcc0\uc218\uac00 \uad6c\uccb4\ud654\ub418\uc5c8\uc73c\ubbc0\ub85c \ud568\uc218 \ubcf8\ubb38\uc5d0\uc11c \ud574\ub2f9 \uc720\ud615\uc744 \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \uc774\uc81c contract \ub0b4\uc5d0\uc11c\ub3c4 \uac00\ub2a5\ud569\ub2c8\ub2e4. \uc5b4\uc124\uc158 \uba54\uc2dc\uc9c0\uac00 \uc788\ub294 \uc720\uc0ac\ud55c \ud568\uc218\ub294 \ucd94\ud6c4 kotlin.test \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0 \ucd94\uac00\ub420 \uc608\uc815\uc785\ub2c8\ub2e4.\r\n\ub610\ud55c final \uba64\ubc84\uc5d0 \ub300\ud55c \uc0ac\uc6a9\uc790 \uc9c0\uc815 contract\ub3c4 \uc815\uc758\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uc804\uc5d0\ub294 \uacc4\uce35 \uad6c\uc870\uc758 \uc77c\ubd80 \uba64\ubc84\uc5d0 \ub300\ud55c contract\uc744 \uc815\uc758\ud558\uba74 \ud574\ub2f9 contract\uc758 \uacc4\uce35 \uad6c\uc870\ub97c \uc554\uc2dc\ud558\uac8c \ub418\uc5b4, \uba64\ubc84 \ud568\uc218\uc5d0 \ub300\ud55c \uacc4\uc57d\uc744 \uc815\uc758\ud558\ub294 \uac83\uc774 \uc644\uc804\ud788 \uae08\uc9c0\ub418\uc5c8\uace0 \uc774 \ubb38\uc81c\uc5d0 \uad00\ud574\uc11c\ub294 \uc5ec\uc804\ud788 \uc124\uacc4\uc640 \ub17c\uc758\uac00 \uc9c4\ud589 \uc911\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uba64\ubc84 \ud568\uc218\uac00 final\uc774\uace0 \ub2e4\ub978 \ud568\uc218\ub97c \uc7ac\uc815\uc758\ud558\uc9c0 \uc54a\uc73c\uba74 \ud574\ub2f9 \ud568\uc218\uc5d0 \ub300\ud55c contract\uc744 \uc815\uc758\ud574\ub3c4 \uc548\uc804\ud569\ub2c8\ub2e4.\r\n\ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac \ubcc0\uacbd \ub0b4\uc6a9\r\n\uc0ac\uc6a9 \uc911\uc9c0\ub41c \uc2e4\ud5d8\uc801 \ucf54\ub8e8\ud2f4 \uc81c\uc678\r\nkotlin.coroutines.experimental API\ub294 kotlin.coroutines\ub97c \uc6b0\uc120\ud568\uc5d0 \ub530\ub77c 1.3.0\uc5d0\uc11c \uc911\ub2e8\ub418\uc5c8\uc2b5\ub2c8\ub2e4. 1.4-M1\uc5d0\uc11c\ub294 kotlin.coroutines.experimental\uc744 \ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\uc11c \uc81c\uac70\ud558\uc5ec \uc0ac\uc6a9 \uc911\ub2e8 \uc8fc\uae30\ub97c \uc885\ub8cc\ud558\ub824 \ud569\ub2c8\ub2e4. \uc5ec\uc804\ud788 JVM\uc5d0\uc11c \uc774 API\ub97c \uc0ac\uc6a9\ud558\ub294 \uc0ac\uc6a9\uc790\ub97c \uc704\ud574\uc11c\ub294 \ubaa8\ub4e0 \uc2e4\ud5d8\uc801 \ucf54\ub8e8\ud2f4 API\uc5d0 \ud638\ud658\uc131 \uc544\ud2f0\ud329\ud2b8 kotlin-coroutines-experimental-compat.jar\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc774 \uc544\ud2f0\ud329\ud2b8\ub294 Maven\uc5d0 \uac8c\uc2dc\ub418\uace0, \ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc640 \ubcc4\ub3c4\ub85c Kotlin \ubc30\ud3ec\uc5d0 \ud3ec\ud568\ub420 \uc608\uc815\uc785\ub2c8\ub2e4. \uc9c0\uae08\uc740 1.4-M1 \uc544\ud2f0\ud329\ud2b8\uc640 \ud568\uaed8 bintray \uc800\uc7a5\uc18c\uc5d0 \uac8c\uc2dc\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4.\r\n\uc0ac\uc6a9 \uc911\ub2e8\ub41c mod \uc5f0\uc0b0\uc790 \uc81c\uac70\r\n\ub610 \ud558\ub098\uc758 \uc0ac\uc6a9 \uc911\ub2e8\ub41c \ud568\uc218\ub294 \ub098\ub204\uae30 \uc5f0\uc0b0 \ud6c4 \ub098\uba38\uc9c0\ub97c \uacc4\uc0b0\ud558\ub294 \uc22b\uc790 \uc720\ud615\uc758 mod \uc5f0\uc0b0\uc790\uc785\ub2c8\ub2e4. \uc774 \ud568\uc218\ub294 Kotlin 1.1\uc5d0\uc11c rem() \ud568\uc218\ub85c \uad50\uccb4\ub418\uc5c8\ub2e4\uac00 \uc774\uc81c \ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\uc11c \uc644\uc804\ud788 \uc81c\uac70\ub418\uc5c8\uc2b5\ub2c8\ub2e4.\r\n\ubd80\ub3d9 \uc18c\uc218\uc810 \uc720\ud615\uc5d0\uc11c Byte \ubc0f Short\ub85c\uc758 \ubcc0\ud658 \uc0ac\uc6a9 \uc911\uc9c0\r\n\ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\ub294 \ubd80\ub3d9 \uc18c\uc218\uc810 \uc22b\uc790\ub97c \uc815\uc218 \uc720\ud615\uc73c\ub85c \ubcc0\ud658\ud558\ub294 \ud568\uc218\uc778 toInt(), toShort(), toByte()\uac00 \uc788\uc2b5\ub2c8\ub2e4. \ubd80\ub3d9 \uc18c\uc218\uc810 \uc22b\uc790\ub97c Short \ubc0f Byte\ub85c \ubcc0\ud658\ud558\uba74 \uac12 \ubc94\uc704\uac00 \uc881\uace0 \uac00\ubcc0 \ud06c\uae30\uac00 \uc791\uc544 \uc608\uae30\uce58 \uc54a\uc740 \uacb0\uacfc\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ubb38\uc81c\ub97c \ud53c\ud558\uae30 \uc704\ud574 1.4-M1\ubd80\ud130\ub294 Double\uacfc Float\uc5d0\uc11c \ud568\uc218 toShort()\uc640 toByte()\ub97c \ub354 \uc774\uc0c1 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc5ec\uc804\ud788 \ubd80\ub3d9 \uc18c\uc218\uc810 \uc22b\uc790\ub97c Byte\ub098 Short\ub85c \ubcc0\ud658\ud574\uc57c \ud558\ub294 \uacbd\uc6b0, Int\ub85c \ubcc0\ud658\ud55c \ub2e4\uc74c \ub300\uc0c1 \uc720\ud615\uc73c\ub85c \ubcc0\ud658\ud558\ub294 2\ub2e8\uacc4 \ubcc0\ud658\uc744 \uc0ac\uc6a9\ud558\uc138\uc694.\r\n\uacf5\ud1b5 \ub9ac\ud50c\ub809\uc158 API\r\n\uacf5\ud1b5 \ub9ac\ud50c\ub809\uc158 API\uac00 \uc218\uc815\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc774\uc81c \uc774 API\uc5d0 3\uac00\uc9c0 \ub300\uc0c1 \ud50c\ub7ab\ud3fc(JVM, JS, Native) \ubaa8\ub450\uc5d0\uc11c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \uba64\ubc84\ub9cc \ud3ec\ud568\ub418\uae30 \ub54c\ubb38\uc5d0 \ub3d9\uc77c\ud55c \ucf54\ub4dc\uac00 \uc5b4\ub290 \ud50c\ub7ab\ud3fc\uc5d0\uc11c\ub098 \uc791\ub3d9\ud560 \uac83\uc784\uc744 \ud655\uc2e0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\nuse() \ubc0f \uc2dc\uac04 \uce21\uc815 \ud568\uc218\uc5d0 \ub300\ud55c \uc0c8\ub85c\uc6b4 Contract\r\n\ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\uc11c contracts\uc758 \ud65c\uc6a9 \ubc94\uc704\uac00 \ub113\uc5b4\uc9d1\ub2c8\ub2e4. 1.4-M1\uc5d0\uc11c\ub294 use() \ud568\uc218\uc640 \uc2dc\uac04 \uce21\uc815 \ud568\uc218 measureTimeMillis() \ubc0f measureNanoTime()\uc5d0 \ub300\ud55c \ucf54\ub4dc \ube14\ub85d\uc758 \ub2e8\uc77c \uc2e4\ud589\uc744 \uc120\uc5b8\ud558\ub294 contract\uc774 \ucd94\uac00\ub418\uc5c8\uc2b5\ub2c8\ub2e4.\r\nKotlin \ub9ac\ud50c\ub809\uc158\uc6a9 Proguard \uad6c\uc131\r\n1.4-M1\ubd80\ud130 kotlin-reflect.jar\uc5d0 Kotlin Reflection\uc6a9 Proguard\/R8 \uad6c\uc131\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4. \uadf8 \ub355\uc5d0 R8 \ub610\ub294 Proguard\ub97c \uc0ac\uc6a9\ud558\ub294 \ub300\ubd80\ubd84\uc758 Android \ud504\ub85c\uc81d\ud2b8\uc5d0\uc11c \ucd94\uac00 \uad6c\uc131 \uc5c6\uc774 kotlin-reflect\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc989, \uc774\uc81c kotlin-reflect \ub0b4\ubd80\uc5d0 Proguard \uaddc\uce59\uc744 \ubcf5\uc0ac\ud558\uc5ec \ubd99\uc5ec\ub123\uc744 \ud544\uc694\uac00 \uc5c6\uc2b5\ub2c8\ub2e4. \ub2e8, \uc5ec\uc804\ud788 \ubc18\uc601\ud558\ub824\ub294 API\ub294 \ubaa8\ub450 \uba85\uc2dc\uc801\uc73c\ub85c \ub098\uc5f4\ud574\uc57c \ud569\ub2c8\ub2e4.\r\nKotlin\/JVM\r\n1.3.70 \ubc84\uc804\ubd80\ud130 Kotlin\uc740 JVM \ubc14\uc774\ud2b8\ucf54\ub4dc(\ub300\uc0c1 \ubc84\uc804 1.8 \uc774\ud6c4)\uc5d0\uc11c \uc720\ud615 \uc5b4\ub178\ud14c\uc774\uc158\uc744 \uc0dd\uc131\ud560 \uc218 \uc788\uc73c\ubbc0\ub85c \uc774\ub7ec\ud55c \uc8fc\uc11d\uc744 \ub7f0\ud0c0\uc784\uc5d0\uc11c \uc0ac\uc6a9\ud560 \uc218 \uc788\uac8c \ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc774 \uae30\ub2a5\uc740 \uc77c\ubd80 \uae30\uc874 Java \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \ud6e8\uc52c \uc27d\uac8c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub3c4\ub85d \ub3d5\uace0 \uc0c8 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc791\uc131\ud558\ub294 \uc0ac\uc6a9\uc790\uc5d0\uac8c \uac15\ub825\ud55c \uc9c0\uc6d0\uc744 \uc81c\uacf5\ud558\uae30 \ub54c\ubb38\uc5d0 \ucee4\ubba4\ub2c8\ud2f0\uc5d0\uc11c \ud55c\ub3d9\uc548 \uc694\uccad\ub418\uc5b4 \uc654\uc2b5\ub2c8\ub2e4.\r\n\ub2e4\uc74c \uc608\uc2dc\uc5d0\uc11c String \uc720\ud615\uc5d0 \uad00\ud55c @Foo \uc5b4\ub178\ud14c\uc774\uc158\uc740 \ubc14\uc774\ud2b8\ucf54\ub4dc\ub85c \ucd9c\ub825\ub41c \ub2e4\uc74c \ub77c\uc774\ube0c\ub7ec\ub9ac \ucf54\ub4dc\uc5d0\uc11c \uc0ac\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\r\n@Target(AnnotationTarget.TYPE)\r\nannotation class Foo\r\n\r\nclass A {\r\n    fun foo(): @Foo String = "OK"\r\n}\r\n\r\n\uc720\ud615 \uc5b4\ub178\ud14c\uc774\uc158\uc744 \ubc14\uc774\ud2b8\ucf54\ub4dc\ub85c \ucd9c\ub825\ud558\ub294 \ubc29\ubc95\uc5d0 \uad00\ud55c \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 Kotlin 1.3.70 \ub9b4\ub9ac\uc2a4 \uad00\ub828 \ube14\ub85c\uadf8 \uae00\uc5d0\uc11c \ud574\ub2f9 \uc139\uc158\uc744 \ucc38\uc870\ud558\uc138\uc694.\r\nKotlin\/JS\r\nKotlin\/JS\uc758 \uacbd\uc6b0, \uc774\ubc88 \ubc84\uc804\uc5d0\uc11c Gradle DSL\uc774 \uba87\uac00\uc9c0 \ubcc0\uacbd\ub418\uc5c8\uc73c\uba70, \ucd5c\uc801\ud654 \ubc0f \uc0c8\ub85c\uc6b4 \uae30\ub2a5\uc744 \uc9c0\uc6d0\ud558\ub294 \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\uac00 \ucd5c\ucd08\ub85c \ud3ec\ud568\ub418\uc5c8\uc2b5\ub2c8\ub2e4.\r\nGradle DSL \ubcc0\uacbd \ub0b4\uc6a9\r\nkotlin.js \ubc0f multiplatform Gradle \ud50c\ub7ec\uadf8\uc778\uc5d0 \uc911\uc694\ud55c \uc124\uc815\uc774 \uc0c8\ub85c \ub3c4\uc785\ub418\uc5c8\uc2b5\ub2c8\ub2e4. build.gradle.kts \ud30c\uc77c\uc758 \ub300\uc0c1 \ube14\ub85d \ub0b4\uc5d0\uc11c \uc774\uc81c produceExecutable() \uc124\uc815\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc73c\uba70 \uc774 \uc124\uc815\uc740 \ube4c\ub4dc \uc911\uc5d0 .js \uc544\ud2f0\ud329\ud2b8\ub97c \uc0dd\uc131\ud558\ub824\ub294 \uacbd\uc6b0 \ud544\uc694\ud569\ub2c8\ub2e4.\r\n\r\nkotlin {\r\n    target {\r\n        useCommonJs()\r\n\r\n        produceExecutable()\r\n        \r\n        browser {}\r\n    }\r\n}\r\n\r\nKotlin\/JS \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc791\uc131\ud560 \ub54c produceExecutable()\uc744 \uc0dd\ub7b5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\ub97c \uc0ac\uc6a9\ud560 \ub54c(\uc774\uc5d0 \ub300\ud55c \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 \uc544\ub798 \ucc38\uc870) \uc774 \uc124\uc815\uc744 \uc0dd\ub7b5\ud558\uba74 \uc2e4\ud589 \uac00\ub2a5\ud55c JS \ud30c\uc77c\uc774 \uc0dd\uc131\ub418\uc9c0 \uc54a\uc73c\uba70 \uc774\uc5d0 \ub530\ub77c \ube4c\ub4dc \ud504\ub85c\uc138\uc2a4\uac00 \ub354 \ube68\ub9ac \uc2e4\ud589\ub429\ub2c8\ub2e4. klib \ud30c\uc77c\uc740 build\/libs \ud3f4\ub354\uc5d0 \uc0dd\uc131\ub418\uba70 \ub2e4\ub978 Kotlin\/JS \ud504\ub85c\uc81d\ud2b8\uc5d0\uc11c \uc0ac\uc6a9\ud558\uac70\ub098 \ub3d9\uc77c\ud55c \ud504\ub85c\uc81d\ud2b8\uc758 \uc885\uc18d \uc694\uc18c\ub85c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. produceExecutable()\uc744 \uba85\uc2dc\uc801\uc73c\ub85c \uc9c0\uc815\ud558\uc9c0 \uc54a\uc73c\uba74 \uc774 \ub3d9\uc791\uc774 \uae30\ubcf8\uc801\uc73c\ub85c \ubc1c\uc0dd\ud569\ub2c8\ub2e4.\r\nproduceExecutable()\uc744 \uc0ac\uc6a9\ud558\uba74 \uc790\uccb4 \uc9c4\uc785\uc810\uc774 \uc788\uac70\ub098 JavaScript \ub77c\uc774\ube0c\ub7ec\ub9ac\ub85c\uc11c JavaScript \uc5d0\ucf54\uc2dc\uc2a4\ud15c\uc5d0\uc11c \uc2e4\ud589 \uac00\ub2a5\ud55c \ucf54\ub4dc\uac00 \uc0dd\uc131\ub429\ub2c8\ub2e4. \uc774\ub807\uac8c \uc0dd\uc131\ub41c \uc2e4\uc81c JavaScript \ud30c\uc77c\uc740 \ub178\ub4dc \uc778\ud130\ud504\ub9ac\ud130\uc5d0\uc11c \uc2e4\ud589\ub418\uac70\ub098 HTML \ud398\uc774\uc9c0\uc5d0 \ud3ec\ud568\ub418\uac70\ub098 \ube0c\ub77c\uc6b0\uc800\uc5d0\uc11c \uc2e4\ud589\ub418\uac70\ub098 JavaScript \ud504\ub85c\uc81d\ud2b8\uc758 \uc885\uc18d \uc694\uc18c\ub85c \uc0ac\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\ub2e8, \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\ub97c \ub300\uc0c1\uc73c\ub85c \ud560 \ub54c(\uc790\uc138\ud55c \ub0b4\uc6a9\uc740 \uc544\ub798 \ucc38\uc870) produceExecutable()\uc740 \ud56d\uc0c1 \ub300\uc0c1\ub2f9 \ud558\ub098\uc758 \ub3c5\ub9bd\uc2e4\ud589\ud615 .js \ud30c\uc77c\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc9c0\uae08\uc740 \uc0dd\uc131\ub41c \uc5ec\ub7ec \uc544\ud2f0\ud329\ud2b8 \uac04 \ucf54\ub4dc \uc911\ubcf5 \uc81c\uac70 \ub610\ub294 \ucf54\ub4dc \ubd84\ud560\uc774 \uc9c0\uc6d0\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.  produceExecutable()\uc758 \uc774 \ub3d9\uc791\uc740 \ud6c4\uc18d \uc774\uc815\ud45c\uc5d0\uc11c \ubcc0\uacbd\ub420 \uc608\uc815\uc785\ub2c8\ub2e4. \uc635\uc158\uc758 \uc774\ub984\ub3c4 \ucd94\ud6c4 \ubcc0\uacbd\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\uc0c8\ub85c\uc6b4 \ubc31\uc5d4\ub4dc\r\nKotlin 1.4-M1\uc740 Kotlin\/JS \ub300\uc0c1\uc5d0 \ub300\ud55c \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\ub97c \ud3ec\ud568\ud558\ub294 \uccab \ubc88\uc9f8 \ubc84\uc804\uc785\ub2c8\ub2e4. \uc774 \ubc31\uc5d4\ub4dc\ub294 \ud06c\uac8c \uac1c\uc120\ub41c \ucd5c\uc801\ud654\uc758 \uae30\ubc18\uc774\uc790, Kotlin\/JS\uac00 JavaScript \ubc0f TypeScript\uc640 \uc0c1\ud638\uc791\uc6a9\ud558\ub294 \ubc29\uc2dd\uc774 \ubcc0\ud55c \uac83\uc744 \uba85\ud655\ud788 \ubcf4\uc5ec\uc8fc\ub294 \uc694\uc18c\uc785\ub2c8\ub2e4. \uc544\ub798\uc5d0 \uac15\uc870 \ud45c\uc2dc\ub41c \uae30\ub2a5\uc740 \ubaa8\ub450 \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\uc5d0 \uad00\ud55c \uac83\uc785\ub2c8\ub2e4. \uc774 \ubc31\uc5d4\ub4dc\ub294 \uc544\uc9c1 \uae30\ubcf8\uc801\uc73c\ub85c \ud65c\uc131\ud654\ub418\uc5b4 \uc788\uc9c0\ub294 \uc54a\uc9c0\ub9cc \ud504\ub85c\uc81d\ud2b8\uc5d0\uc11c \uc0ac\uc6a9\ud574\ubcf4\uace0 \uc0c8 \ubc31\uc5d4\ub4dc\uc5d0\uc11c \ub77c\uc774\ube0c\ub7ec\ub9ac \uc900\ube44\ub97c \uc2dc\uc791\ud574\ubcfc \uac83\uc744 \uad8c\uc7a5\ud569\ub2c8\ub2e4. \ubb3c\ub860 \uc5ec\ub7ec\ubd84\uc758 \uc758\uacac\ub3c4 \ubcf4\ub0b4\uc8fc\uc2dc\uace0 \uc5b4\ub5a4 \ubb38\uc81c\ub4e0 \ubc1c\uc0dd\ud558\uba74 \ub85c\uadf8\uc5d0 \uae30\ub85d\ud574 \uc8fc\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4.\r\n\uc0c8\ub85c\uc6b4 \ubc31\uc5d4\ub4dc \uc0ac\uc6a9 \ubc29\ubc95\r\n\uc0c8 \ubc31\uc5d4\ub4dc \uc0ac\uc6a9\ud558\ub824\uba74 gradle.properties \ud30c\uc77c\uc5d0\uc11c \ub2e4\uc74c \ud50c\ub798\uadf8\ub97c \uc124\uc815\ud558\uc138\uc694.\r\n\r\nkotlin.js.compiler=ir\r\n\r\nIR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc \ubc0f \uae30\ubcf8 \ubc31\uc5d4\ub4dc\uc5d0 \ub300\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0dd\uc131\ud574\uc57c \ud558\ub294 \uacbd\uc6b0, \uc774 \ud50c\ub798\uadf8\ub97c both\ub85c \uc124\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud50c\ub798\uadf8 \uae30\ub2a5\uc5d0 \uad00\ud55c \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 \uc774 \ube14\ub85c\uadf8 \uae00\uc758 “both \ubaa8\ub4dc” \uc139\uc158\uc5d0 \ub098\uc640 \uc788\uc2b5\ub2c8\ub2e4. \uc0c8 \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\uc640 \uae30\ubcf8 \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\ub294 2\uc9c4 \ud638\ud658\ub418\uc9c0 \uc54a\uc73c\ubbc0\ub85c \ud50c\ub798\uadf8\uac00 \ud544\uc694\ud569\ub2c8\ub2e4.\r\n2\uc9c4 \ud638\ud658\ub418\uc9c0 \uc54a\uc74c\r\n\uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\uc758 \uc8fc\uc694 \ubcc0\uacbd \ub0b4\uc6a9\uc740 \uae30\ubcf8 \ubc31\uc5d4\ub4dc\uc640 2\uc9c4 \ud638\ud658\ub418\uc9c0 \uc54a\ub294\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4. Kotlin\/JS\uc758 \ub450 \ubc31\uc5d4\ub4dc \uac04 \ud638\ud658\uc131\uc774 \uc5c6\uc73c\uba74 \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\ub85c \ub9cc\ub4e0 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uae30\ubcf8 \ubc31\uc5d4\ub4dc\uc5d0\uc11c \uc0ac\uc6a9\ud560 \uc218 \uc5c6\uc73c\uba70 \uadf8 \ubc18\ub300\ub3c4 \ub9c8\ucc2c\uac00\uc9c0\uc785\ub2c8\ub2e4.\r\n\ud504\ub85c\uc81d\ud2b8\uc5d0\uc11c IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\ub97c \uc0ac\uc6a9\ud558\ub824\uba74 \ubaa8\ub4e0 Kotlin \uc885\uc18d \uc694\uc18c\ub97c \uc774 \uc0c8\ub85c\uc6b4 \ubc31\uc5d4\ub4dc\uac00 \uc9c0\uc6d0\ub418\ub294 \ubc84\uc804\uc73c\ub85c \uc5c5\ub370\uc774\ud2b8\ud574\uc57c \ud569\ub2c8\ub2e4. Kotlin 1.4-M1\uc6a9\uc73c\ub85c JetBrains\uc5d0\uc11c \uac8c\uc2dc\ud55c Kotlin\/JS \ub300\uc0c1 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\ub294 \uc774\ubbf8 \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\uc640 \ud568\uaed8 \uc0ac\uc6a9\ud558\ub294 \ub370 \ud544\uc694\ud55c \ubaa8\ub4e0 \uc544\ud2f0\ud329\ud2b8\uac00 \ud3ec\ud568\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\ub294 \uacbd\uc6b0 Gradle\uc5d0\uc11c \uc62c\ubc14\ub978 \uc544\ud2f0\ud329\ud2b8\ub97c \uc790\ub3d9\uc73c\ub85c \uc120\ud0dd\ud569\ub2c8\ub2e4(\uc989, IR\ubcc4 \uc88c\ud45c\ub97c \uc9c0\uc815\ud560 \ud544\uc694\uac00 \uc5c6\uc74c). \ub2e8, kotlin-wrappers\uc640 \uac19\uc740 \uc77c\ubd80 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub294 \uae30\ubcf8 \ubc31\uc5d4\ub4dc\uc758 \ud2b9\uc815 \ud2b9\uc131\uc5d0 \uc758\uc874\ud558\uae30 \ub54c\ubb38\uc5d0 \uc0c8 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc \uc0ac\uc6a9 \uc2dc \ub2e4\uc18c \ubb38\uc81c\uac00 \uc788\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc800\ud76c \uc5ed\uc2dc \uc774\ub97c \uc778\uc9c0\ud558\uace0 \uc788\uc73c\uba70 \ud5a5\ud6c4 \uc774 \uae30\ub2a5\uc744 \uac1c\uc120\ud558\uae30 \uc704\ud574 \uc791\uc5c5\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.\r\n\ud604\uc7ac \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc \ubc0f \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\uc640\uc758 \ud638\ud658\uc131\uc744 \uc81c\uacf5\ud558\ub824\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac \uc791\uc131\uc790 \uc778 \uacbd\uc6b0 \uc774 \ube14\ub85c\uadf8 \uae00\uc758 \"both \ubaa8\ub4dc\" \uc139\uc158\uc744 \ucd94\uac00\ub85c \ud655\uc778\ud574\uc8fc\uc138\uc694.\r\n\ub2e4\uc74c \uc139\uc158\uc5d0\uc11c\ub294 \uc0c8 \ucef4\ud30c\uc77c\ub7ec\uc5d0\uc11c \uae30\ub300\ud560 \uc218 \uc788\ub294 \uba87\uac00\uc9c0 \uc774\uc810\uacfc \ucc28\uc774\uc810\uc5d0 \uad00\ud574 \uc790\uc138\ud788 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.\r\n\ucd5c\uc801\ud654\ub41c DCE\r\n\uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\ub294 \uae30\ubcf8 \ubc31\uc5d4\ub4dc\ubcf4\ub2e4 \ud6e8\uc52c \ub354 \uc801\uadf9\uc801\uc778 \ucd5c\uc801\ud654\ub97c \uc218\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc0dd\uc131\ub41c \ucf54\ub4dc\ub294 \uc815\uc801 \ubd84\uc11d\uae30\uc640 \ud568\uaed8 \ub354 \uc798 \uc791\ub3d9\ud558\uba70 Google\uc758 Closure Compiler\ub97c \ud1b5\ud574 \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\uc5d0\uc11c \uc0dd\uc131\ub41c \ucf54\ub4dc\ub97c \uc2e4\ud589\ud558\uace0 \uace0\uae09 \ubaa8\ub4dc \ucd5c\uc801\ud654\ub97c \uc0ac\uc6a9\ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4(\ub2e8, Kotlin\/JS Gradle \ud50c\ub7ec\uadf8\uc778\uc740 \uc774\uc5d0 \ub300\ud55c \ud2b9\uc815 \uc9c0\uc6d0\uc744 \uc81c\uacf5\ud558\uc9c0 \uc54a\uc74c).\r\n\uc5ec\uae30\uc11c \uac00\uc7a5 \ub208\uc5d0 \ub744\ub294 \ubcc0\ud654\ub294 \uc0dd\uc131\ub41c \uc544\ud2f0\ud329\ud2b8\uc758 \ucf54\ub4dc \ud06c\uae30\uc785\ub2c8\ub2e4. \ubd88\ud544\uc694\ud55c \ucf54\ub4dc(dead code) \uc81c\uac70 \ubc29\ubc95\uc774 \uac1c\uc120\ub41c \ub355\uc5d0 \uc544\ud2f0\ud329\ud2b8 \ud06c\uae30\uac00 \ud06c\uac8c \uc904\uc5c8\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \"Hello, World!\" Kotlin\/JS \ud504\ub85c\uadf8\ub7a8\uc758 \ud06c\uae30\ub294 1.7KiB \ubbf8\ub9cc\uc774 \ub429\ub2c8\ub2e4. kotlinx.coroutines\ub97c \uc0ac\uc6a9\ud558\ub294 \uc774 \uc608\uc2dc \ud504\ub85c\uc81d\ud2b8\ucc98\ub7fc \ub354 \ubcf5\uc7a1\ud55c (\ub370\ubaa8) \ud504\ub85c\uc81d\ud2b8\uc778 \uacbd\uc6b0 \ud06c\uae30\uac00 \ub300\ud3ed \ubcc0\ud558\uc600\uc73c\uba70 \uc774\ub294 \ub2e4\uc74c\uc5d0\uc11c \uba85\ud655\ud788 \ud655\uc778\ub429\ub2c8\ub2e4.\r\n\r\n\r\n\r\n\r\n\uae30\ubcf8 \ubc31\uc5d4\ub4dc\r\nIR \ubc31\uc5d4\ub4dc\r\n\r\n\r\n\r\n\r\n\ucef4\ud30c\uc77c \ud6c4\r\n3.9MiB\r\n1.1MiB\r\n\r\n\r\nJS DCE \ud6c4\r\n713KiB\r\n430KiB\r\n\r\n\r\n\ubc88\ub4e4 \ud6c4\r\n329KiB\r\n184KiB\r\n\r\n\r\nZIP \ud6c4\r\n74KiB\r\n40KiB\r\n\r\n\r\n\r\n\uc544\uc9c1 \uc640\ub2ff\uc9c0 \uc54a\uc73c\uc2e0\ub2e4\uba74 \uc9c1\uc811 \uc0ac\uc6a9\ud574 \ubcf4\uc138\uc694. DCE \ubc0f \ubc88\ub4e4 \uc791\uc5c5\uc740 Kotlin 1.4-M1\uc758 \ub450 \ubc31\uc5d4\ub4dc\uc5d0\uc11c \uae30\ubcf8\uc801\uc73c\ub85c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\uc120\uc5b8\uc744 JavaScript\ub85c \ub0b4\ubcf4\ub0b4\uae30\r\nIR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\ub97c \uc0ac\uc6a9\ud560 \ub54c public\uc73c\ub85c \ud45c\uc2dc\ub41c \uc120\uc5b8\uc774 \ub354 \uc774\uc0c1 \uc790\ub3d9\uc73c\ub85c \ub0b4\ubcf4\ub0b4\uae30 \ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4(\uc774\ub984\uc774 \uc5c9\ud0a8 \ubc84\uc804\uc774\ub77c\ub3c4 \ub9c8\ucc2c\uac00\uc9c0). IR \ucef4\ud30c\uc77c\ub7ec\uc758 closed-world \ubaa8\ub378\uc5d0\uc11c\ub294 \ub0b4\ubcf4\ub0b8 \uc120\uc5b8\uc5d0 \ud2b9\ubcc4\ud788 \uc8fc\uc11d\uc774 \ub2ec\ub9b0 \uac83\uc73c\ub85c \uac00\uc815\ud558\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc774\ub294 \uc704\uc5d0\uc11c \uc5b8\uae09\ub41c \uae30\ub2a5\ucc98\ub7fc \ucd5c\uc801\ud654\uc5d0 \ub3c4\uc6c0\uc774 \ub418\ub294 \uc694\uc18c \uc911 \ud558\ub098\uc785\ub2c8\ub2e4.\r\nJavaScript \ub610\ub294 TypeScript \uc678\ubd80\uc5d0\uc11c \ucd5c\uc0c1\uc704 \uc120\uc5b8\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uac8c \ud558\ub824\uba74 @JsExport \uc5b4\ub178\ud14c\uc774\uc158\uc744 \uc0ac\uc6a9\ud558\uc138\uc694. \ub2e4\uc74c \uc608\uc2dc\uc5d0\uc11c\ub294 KotlinGreeter(\ud574\ub2f9 \uba54\uc18c\ub4dc \ud3ec\ud568) \ubc0f farewell()\uc744 JavaScript\uc5d0\uc11c \uc0ac\uc6a9 \uac00\ub2a5\ud558\uac8c \ud558\uba74\uc11c secretGreeting()\uc744 Kotlin \uc804\uc6a9\uc73c\ub85c \uc720\uc9c0\ud569\ub2c8\ub2e4.\r\n\r\npackage blogpost\r\n\r\n@JsExport\r\nclass KotlinGreeter(private val who: String) {\r\n    fun greet() = "Hello, $who!"\r\n}\r\n\r\n@JsExport\r\nfun farewell(who: String) = "Bye, $who!"\r\n\r\nfun secretGreeting(who: String) = "Sup, $who!" \/\/ only from Kotlin!\r\n\r\n\ud14c\uc2a4\ud2b8 \ubc84\uc804: TypeScript \uc815\uc758\r\n\uc57c\uc2ec\ucc28\uac8c \uc120\ubcf4\uc774\ub294 Kotlin\/JS IR \ucef4\ud30c\uc77c\ub7ec\uc758 \ub610 \ub2e4\ub978 \uae30\ub2a5\uc740 Kotlin \ucf54\ub4dc\uc5d0\uc11c TypeScript \uc815\uc758\ub97c \uc0dd\uc131\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc815\uc758\ub294 \uc790\ub3d9 \uc644\uc131 \uae30\ub2a5\uc744 \uc81c\uacf5\ud558\uace0 \uc815\uc801 \ubd84\uc11d\uae30\ub97c \uc9c0\uc6d0\ud558\uba70 JS \ubc0f TS \ud504\ub85c\uc81d\ud2b8\uc5d0 Kotlin \ucf54\ub4dc\ub97c \uc27d\uac8c \ud3ec\ud568\uc2dc\ud0a4\uae30 \uc704\ud574 \ud558\uc774\ube0c\ub9ac\ub4dc \uc571\uc5d0\uc11c \uc791\uc5c5\ud560 \ub54c JavaScript \ub3c4\uad6c \ubc0f IDE\uc5d0\uc11c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.\r\nproduceExecutable()\uc744 \uc0ac\uc6a9\ud558\ub3c4\ub85d \uad6c\uc131\ub41c \ud504\ub85c\uc81d\ud2b8\uc5d0\uc11c @JsExport(\uc704 \ucc38\uc870)\ub85c \ud45c\uc2dc\ub41c \ucd5c\uc0c1\uc704 \uc120\uc5b8\uc758 \uacbd\uc6b0 TypeScript \uc815\uc758\uac00 \uc788\ub294 .d.ts \ud30c\uc77c\uc774 \uc0dd\uc131\ub429\ub2c8\ub2e4. \uc704\uc758 \uc870\uac01\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \ud45c\uc2dc\ub429\ub2c8\ub2e4.\r\n\r\n\/\/ [...]\r\nnamespace blogpost {\r\n    class KotlinGreeter {\r\n        constructor(who: string)\r\n        greet(): string\r\n    }\r\n    function farewell(who: string): string\r\n}\r\n\/\/ [...]\r\n\r\nKotlin 1.4-M1\uc5d0\uc11c \uc774\ub7ec\ud55c \uc120\uc5b8\uc740 \uc6f9 \ud328\ud0a4\uc9c0\ub418\uc9c0 \uc54a\uc740 \ud574\ub2f9 JavaScript \ucf54\ub4dc\uc640 \ud568\uaed8 build\/js\/packages\/<package_name>\/kotlin\uc5d0\uc11c \ucc3e\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e8, \uc774\ub294 \ud14c\uc2a4\ud2b8 \ubc84\uc804\uc77c \ubfd0\uc774\ubbc0\ub85c \ud604\uc7ac \uae30\ubcf8\uc801\uc73c\ub85c distributions \ud3f4\ub354\uc5d0 \ucd94\uac00\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc774 \ub3d9\uc791\uc740 \ud5a5\ud6c4 \ubcc0\uacbd\ub420 \uc608\uc815\uc785\ub2c8\ub2e4.\r\nBoth \ubaa8\ub4dc\r\n\ub77c\uc774\ube0c\ub7ec\ub9ac \uad00\ub9ac\uc790\uac00 \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\ub85c \uc27d\uac8c \uc774\ub3d9\ud560 \uc218 \uc788\ub3c4\ub85d gradle.properties\uc758 kotlin.js.compiler \ud50c\ub798\uadf8\uc5d0 \ub300\ud55c \ucd94\uac00 \uc124\uc815\uc774 \ub3c4\uc785\ub418\uc5c8\uc2b5\ub2c8\ub2e4.\r\n\r\nkotlin.js.compiler=both\r\n\r\nboth \ubaa8\ub4dc\uc5d0\uc11c\ub294 \uc18c\uc2a4\uc5d0\uc11c \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \ube4c\ub4dc\ud560 \ub54c IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\uc640 \uae30\ubcf8 \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\uac00 \ubaa8\ub450 \uc0ac\uc6a9\ub429\ub2c8\ub2e4(\ubaa8\ub4dc \uc774\ub984\uc774 both\uc778 \uc774\uc720). \uc774\ub294 Kotlin IR\uc774 \uc788\ub294 klib \ud30c\uc77c\uacfc \uae30\ubcf8 \ucef4\ud30c\uc77c\ub7ec\uc758 js \ud30c\uc77c\uc774 \ubaa8\ub450 \uc0dd\uc131\ub428\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \ub3d9\uc77c\ud55c Maven \uc88c\ud45c\ub85c \uac8c\uc2dc\ub418\uba74 Gradle\uc740 \uc0ac\uc6a9 \uc0ac\ub840\uc5d0 \ub530\ub77c \uc62c\ubc14\ub978 \uc544\ud2f0\ud329\ud2b8\ub97c \uc790\ub3d9\uc73c\ub85c \uc120\ud0dd\ud569\ub2c8\ub2e4(\uc774\uc804 \ucef4\ud30c\uc77c\ub7ec\uc758 \uacbd\uc6b0 js, \uc0c8 \ucef4\ud30c\uc77c\ub7ec\uc758 \uacbd\uc6b0 klib). \uc989, \uc774\ubbf8 Kotlin 1.4-M1\ub85c \uc5c5\uadf8\ub808\uc774\ub4dc\ub418\uace0 \ub450 \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc \uc911 \ud558\ub098\ub97c \uc0ac\uc6a9\ud558\ub294 \ud504\ub85c\uc81d\ud2b8\uc5d0\uc11c \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0c8\ub85c\uc6b4 IR \ucef4\ud30c\uc77c\ub7ec \ubc31\uc5d4\ub4dc\ub85c \ucef4\ud30c\uc77c\ud558\uace0 \uac8c\uc2dc\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c \ud504\ub85c\uc81d\ud2b8\ub97c 1.4-M1\ub85c \uc5c5\uadf8\ub808\uc774\ub4dc\ud55c \uacbd\uc6b0\uc5d0\ub3c4 \uc5ec\uc804\ud788 \uae30\ubcf8 \ubc31\uc5d4\ub4dc\ub97c \uc0ac\uc6a9\ud558\ub294 \uc0ac\uc6a9\uc790\uc758 \ud658\uacbd\uc744 \ubcc0\ud568 \uc5c6\uc774 \uc720\uc9c0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\uadf8\ub7ec\ub098 \uc885\uc18d \uc694\uc18c \ubc0f \ud604\uc7ac \ud504\ub85c\uc81d\ud2b8\uac00 both \ubaa8\ub4dc\ub85c \ube4c\ub4dc\ub420 \ub54c IDE\uac00 \ub77c\uc774\ube0c\ub7ec\ub9ac \ucc38\uc870\ub97c \uc62c\ubc14\ub974\uac8c \ud574\uc11d\ud558\uc9c0 \ubabb\ud558\ub294 \ubb38\uc81c\uac00 \uc5ec\uc804\ud788 \uc788\uc2b5\ub2c8\ub2e4. \uc800\ud76c\ub3c4 \uc774\ub97c \uc778\uc9c0\ud558\uace0 \uc788\uc73c\uba70 \uace7 \ud574\uacb0\ud558\uaca0\uc2b5\ub2c8\ub2e4.\r\nKotlin\/Native\r\nObjective-C \uc81c\ub124\ub9ad \uae30\ubcf8 \uc9c0\uc6d0\r\nKotlin\uc758 \uc774\uc804 \ubc84\uc804\uc5d0\uc11c\ub294 Objective-C \uc0c1\ud638 \uc6b4\uc6a9\uc131\uc5d0 \uc81c\ub124\ub9ad\uc5d0 \ub300\ud55c \uc2e4\ud5d8\uc801 \uc9c0\uc6d0\uc744 \uc81c\uacf5\ud588\uc2b5\ub2c8\ub2e4. \uc774\ub54c Kotlin \ucf54\ub4dc\uc5d0\uc11c \uc81c\ub124\ub9ad\uc73c\ub85c \ud504\ub808\uc784\uc6cc\ud06c \ud5e4\ub354\ub97c \uc0dd\uc131\ud558\ub824\uba74 -Xobjc-generics \ucef4\ud30c\uc77c\ub7ec \uc635\uc158\uc744 \uc0ac\uc6a9\ud574\uc57c \ud588\uc2b5\ub2c8\ub2e4. \uc774\uc81c 1.4-M1\uc5d0\uc11c\ub294 \uc774 \ub3d9\uc791\uc774 \uae30\ubcf8\uac12\uc774 \ub429\ub2c8\ub2e4. \uacbd\uc6b0\uc5d0 \ub530\ub77c \uc774 \ub54c\ubb38\uc5d0 Kotlin \ud504\ub808\uc784\uc6cc\ud06c\ub97c \ud638\ucd9c\ud558\ub294 \uae30\uc874 Objective-C \ub610\ub294 Swift \ucf54\ub4dc\uac00 \uc190\uc0c1\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc81c\ub124\ub9ad \uc5c6\uc774 \ud504\ub808\uc784\uc6cc\ud06c \ud5e4\ub354\ub97c \uc791\uc131\ud558\ub824\uba74 -Xno-objc-generics \ucef4\ud30c\uc77c\ub7ec \uc635\uc158\uc744 \ucd94\uac00\ud558\uc138\uc694.\r\n\r\nbinaries.framework {\r\n     freeCompilerArgs += "-Xno-objc-generics"\r\n}\r\n\r\n\ubb38\uc11c\uc5d0 \ub098\uc5f4\ub41c \ubaa8\ub4e0 \uc138\ubd80 \uc0ac\ud56d \ubc0f \uc81c\ud55c \uc0ac\ud56d\uc740 \uc5ec\uc804\ud788 \u200b\u200b\uc720\ud6a8\ud569\ub2c8\ub2e4.\r\nObjective-C\/Swift \uc0c1\ud638 \uc6b4\uc6a9\uc131\uc758 \uc608\uc678 \ucc98\ub9ac \ubcc0\uacbd\r\n1.4\uc5d0\uc11c\ub294 \uc608\uc678 \ud574\uc11d \ubc29\uc2dd\uacfc \uad00\ub828\ud558\uc5ec Kotlin\uc5d0\uc11c \uc0dd\uc131\ub41c Swift API\uac00 \uc57d\uac04 \ubcc0\uacbd\ub429\ub2c8\ub2e4. Kotlin\uacfc Swift\uc758 \uc624\ub958 \ucc98\ub9ac \ubc29\uc2dd\uc5d0\ub294 \uadfc\ubcf8\uc801\uc778 \ucc28\uc774\uac00 \uc788\uc2b5\ub2c8\ub2e4. \ubaa8\ub4e0 Kotlin \uc608\uc678\ub294 \ud655\uc778\ub418\uc9c0 \uc54a\ub294 \ubc18\uba74 Swift\ub294 \uc624\ub958\ub9cc \ud655\uc778\ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c Swift \ucf54\ub4dc\uac00 \uc608\uc0c1\ub418\ub294 \uc608\uc678\ub97c \uc778\uc2dd\ud558\uac8c \ud558\ub824\uba74 Kotlin \ud568\uc218\uc5d0 \uc7a0\uc7ac\uc801 \uc608\uc678 \ud074\ub798\uc2a4 \ubaa9\ub85d\uc744 \uba85\uc2dc\ud558\ub294 @Throws \uc5b4\ub178\ud14c\uc774\uc158\uc744 \ud45c\uc2dc\ud574\uc57c \ud569\ub2c8\ub2e4.\r\nSwift \ub610\ub294 Objective-C \ud504\ub808\uc784\uc6cc\ud06c\ub85c \ucef4\ud30c\uc77c\ud560 \ub54c @Throws \uc5b4\ub178\ud14c\uc774\uc158\uc744 \ud3ec\ud568\ud558\uac70\ub098 \uc0c1\uc18d\ud558\ub294 \ud568\uc218\ub294 Objective-C\uc5d0\uc11c NSError* \uc0dd\uc131 \uba54\uc18c\ub4dc\ub85c, Swift\uc5d0\uc11c throws \uba54\uc18c\ub4dc\ub85c \ud45c\uc2dc\ub429\ub2c8\ub2e4.\r\n\uc774\uc804\uc5d0 RuntimeException \ubc0f Error \uc774\uc678\uc758 \uc608\uc678\ub294 NSError\ub85c \uc804\ub2ec\ub418\uc5c8\uc2b5\ub2c8\ub2e4. 1.4-M1\uc5d0\uc11c\ub294 \uc774 \ub3d9\uc791\uc774 \ubcc0\uacbd\ub418\uc5b4, \uc774\uc81c NSError\ub294 \uc608\uc678\uac00 @Throws \uc5b4\ub178\ud14c\uc774\uc158(\ub610\ub294 \ud574\ub2f9 \ud558\uc704 \ud074\ub798\uc2a4)\uc758 \ub9e4\uac1c\ubcc0\uc218\ub85c \uc9c0\uc815\ub41c \ud074\ub798\uc2a4\uc758 \uc778\uc2a4\ud134\uc2a4\uc778 \uacbd\uc6b0\uc5d0\ub9cc \ub358\uc838\uc9d1\ub2c8\ub2e4. Swift\/Objective-C\uc5d0 \ub3c4\ub2ec\ud558\ub294 \uae30\ud0c0 Kotlin \uc608\uc678\ub294 \ucc98\ub9ac\ub418\uc9c0 \uc54a\uc740 \uac83\uc73c\ub85c \uac04\uc8fc\ub418\uc5b4 \ud504\ub85c\uadf8\ub7a8\uc774 \uc885\ub8cc\ub429\ub2c8\ub2e4.\r\n\uc131\ub2a5 \uac1c\uc120 \uc0ac\ud56d\r\nJetBrains\ub294 Kotlin\/Native \ucef4\ud30c\uc77c \ubc0f \uc2e4\ud589\uc758 \uc804\ubc18\uc801\uc778 \uc131\ub2a5\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\uae30 \uc704\ud574 \uacc4\uc18d \ub178\ub825\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. 1.4-M1\uc5d0\uc11c\ub294 \uc77c\ubd80 \ubca4\uce58\ub9c8\ud06c \uae30\uc900 \ucd5c\ub300 2\ubc30 \ub354 \ube60\ub974\uac8c \uc791\ub3d9\ud558\ub294 \uc0c8\ub85c\uc6b4 \uac1d\uccb4 \ud560\ub2f9\uc790\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. \ud604\uc7ac \uc0c8 \ud560\ub2f9\uc790\ub294 \uc2e4\ud5d8\uc801\uc774\uba70 \uae30\ubcf8\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc774 \ud560\ub2f9\uc790\ub85c \uc804\ud658\ud558\ub824\uba74 -Xallocator=mimalloc \ucef4\ud30c\uc77c\ub7ec \uc635\uc158\uc744 \uc0ac\uc6a9\ud558\uba74 \ub429\ub2c8\ub2e4.\r\n\ud638\ud658\uc131\r\nKotlin 1.4\ub294 \uc77c\ubd80 \uc0ac\ub840\uc5d0\uc11c 1.3\uacfc \uc5ed\ud638\ud658\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc0ac\ub840\ub294 \uc5b8\uc5b4 \uc704\uc6d0\ud68c\uc5d0\uc11c \ubaa8\ub450 \uc2e0\uc911\ud558\uac8c \uac80\ud1a0\ud55c \ud6c4 \"\ud638\ud658\uc131 \uac00\uc774\ub4dc\"\uc5d0 \ubaa9\ub85d\uc744 \ub098\uc5f4\ud569\ub2c8\ub2e4(\uc774 \uc591\uc2dd\uacfc \uc720\uc0ac). \ud604\uc7ac \uc774 \ubaa9\ub85d\uc740 YouTrack\uc5d0\uc11c \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\uc624\ubc84\ub85c\ub4dc \ud574\uacb0 \uaddc\uce59\uc774 \uc57d\uac04 \ubcc0\uacbd\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub984\uc740 \ub3d9\uc77c\ud558\uc9c0\ub9cc \uc2dc\uadf8\ub108\ucc98\uac00 \ub2e4\ub978 \uc5ec\ub7ec \ud568\uc218\uac00 \uc788\ub294 \uacbd\uc6b0 Kotlin 1.4\uc5d0\uc11c \ud638\ucd9c\ub418\ub294 \ud568\uc218\uac00 Kotlin 1.3\uc5d0\uc11c \uc120\ud0dd\ub41c \ud568\uc218\uc640 \ub2e4\ub97c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uc774\ub294 \uc77c\ubd80 \ucf54\ub108 \ucf00\uc774\uc2a4\uc5d0\uc11c\ub9cc \ubc1c\uc0dd\ud558\uba70 \uc2e4\uc81c\ub85c\ub294 \uac70\uc758 \ubc1c\uc0dd\ud558\uc9c0 \uc54a\uc744 \uac83\uc73c\ub85c \uc608\uc0c1\ub429\ub2c8\ub2e4. \ub610\ud55c \uc2e4\uc81c\ub85c \uc624\ubc84\ub85c\ub4dc\ub41c \ud568\uc218\ub294 \uc720\uc0ac\ud558\uac8c \uc791\ub3d9\ud558\uace0 \uacb0\uad6d \uc11c\ub85c\ub97c \ud638\ucd9c\ud55c\ub2e4\uace0 \uac00\uc815\ud558\ubbc0\ub85c \uc774\ub7ec\ud55c \ubcc0\uacbd\uc774 \ud504\ub85c\uadf8\ub7a8 \ub3d9\uc791\uc5d0 \uc601\ud5a5\uc744 \ubbf8\uce58\uc9c0 \uc54a\uc744 \uac83\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ub2e4\uc591\ud55c \uc218\uc900\uc758 \uc81c\ub124\ub9ad\uacfc \uc218\ub9ce\uc740 \uc624\ubc84\ub85c\ub4dc\uac00 \uc788\ub294 \uae4c\ub2e4\ub85c\uc6b4 \ucf54\ub4dc\ub97c \uc791\uc131\ud558\ub294 \uacbd\uc6b0 \uc8fc\uc758\ud574 \uc8fc\uc138\uc694. \uc774\ub7ec\ud55c \uc885\ub958\uc758 \ubaa8\ub4e0 \uc0ac\ub840\ub294 \uc704\uc5d0\uc11c \uc5b8\uae09\ud55c \ud638\ud658\uc131 \uac00\uc774\ub4dc\uc5d0 \ub098\uc5f4\ub420 \uc608\uc815\uc785\ub2c8\ub2e4.\r\n\uc0ac\uc804 \ub9b4\ub9ac\uc2a4 \ub178\ud2b8\r\n\r\n  \uc774\uc804 \ubc84\uc804\uacfc\uc758 \ud638\ud658\uc131\uc740 \uc0ac\uc804 \ub9b4\ub9ac\uc2a4 \ubc84\uc804\uc5d0\ub294 \uc801\uc6a9\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uae30\ub2a5 \ubc0f API\ub294 \ud6c4\uc18d \ub9b4\ub9ac\uc2a4\uc5d0\uc11c \ubcc0\uacbd\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ucd5c\uc885 RC\uc5d0 \ub3c4\ub2ec\ud558\uba74 \uc0ac\uc804 \ub9b4\ub9ac\uc2a4 \ubc84\uc804\uc5d0\uc11c \uc0dd\uc131\ub41c \ubaa8\ub4e0 2\uc9c4 \ud30c\uc77c\uc774 \ucef4\ud30c\uc77c\ub7ec\uc5d0\uc11c \uc0ac\uc6a9 \uae08\uc9c0\ub418\uba70 1.4Mx\ub85c \ucef4\ud30c\uc77c\ub41c \ubaa8\ub4e0 \ud30c\uc77c\uc744 \ub2e4\uc2dc \ucef4\ud30c\uc77c\ud574\uc57c \ud569\ub2c8\ub2e4.\r\n\r\n\uccb4\ud5d8 \ubc29\ubc95\r\n\uc5b8\uc81c\ub098\ucc98\ub7fc play.kotl.in\uc5d0\uc11c Kotlin\uc744 \uc628\ub77c\uc778\uc5d0\uc11c \uc0ac\uc6a9\ud574\ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\nIntelliJ IDEA \ubc0f Android Studio\uc5d0\uc11c Kotlin \ud50c\ub7ec\uadf8\uc778\uc744 1.4-M1 \ubc84\uc804\uc73c\ub85c \uc5c5\ub370\uc774\ud2b8\ud558\uc138\uc694. \uc5c5\ub370\uc774\ud2b8 \ubc29\ubc95 \ubcf4\uae30\r\n\ud14c\uc2a4\ud2b8 \ubc84\uc804\uc744 \uc124\uce58\ud558\uae30 \uc804\uc5d0 \uc0dd\uc131\ub41c \uae30\uc874 \ud504\ub85c\uc81d\ud2b8\ub97c \uc791\uc5c5\ud558\ub824\uba74 Gradle \ub610\ub294 Maven\uc5d0\uc11c \ud14c\uc2a4\ud2b8 \ubc84\uc804\uc5d0 \ub300\ud55c \ube4c\ub4dc\ub97c \uad6c\uc131\ud574\uc57c \ud569\ub2c8\ub2e4.\r\n\uba85\ub839\uc904 \ucef4\ud30c\uc77c\ub7ec\ub294 Github \ub9b4\ub9ac\uc2a4 \ud398\uc774\uc9c0\uc5d0\uc11c \ub2e4\uc6b4\ub85c\ub4dc\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\uc774 \ub9b4\ub9ac\uc2a4\uc640 \ud568\uaed8 \uac8c\uc2dc\ub41c \ub2e4\uc74c \ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\r\n\r\nkotlinx.atomicfu \ubc84\uc804: 0.14.2-1.4-M1\r\nkotlinx.coroutines \ubc84\uc804: 1.3.5-1.4-M1\r\nkotlinx.serialization \ubc84\uc804: 0.20.0-1.4-M1\r\nktor \ubc84\uc804: 1.3.2-1.4-M1\r\n\r\n\ub9b4\ub9ac\uc2a4\uc5d0 \uad00\ud55c \uc138\ubd80 \uc815\ubcf4 \ubc0f \ud638\ud658\ub418\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac \ubaa9\ub85d\uc740 \uc5ec\uae30\uc5d0 \ub098\uc640 \uc788\uc2b5\ub2c8\ub2e4.\r\n\uc758\uacac\uc744 \uacf5\uc720\ud574 \uc8fc\uc138\uc694\r\n\ubc84\uadf8\ub97c \ubc1c\uacac\ud558\uc2e0 \uacbd\uc6b0 \uc774\uc288 \ud2b8\ub798\ucee4 YouTrack\uc73c\ub85c \ubcf4\uace0\ud574 \uc8fc\uc2dc\uba74 \ub300\ub2e8\ud788 \uac10\uc0ac\ud558\uaca0\uc2b5\ub2c8\ub2e4. \uc800\ud76c\ub294 \ucd5c\uc885 \ub9b4\ub9ac\uc2a4 \uc804\uc5d0 \ubaa8\ub4e0 \uc911\uc694\ud55c \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub824\uace0 \ub178\ub825\ud558\uace0 \uc788\uc73c\ubbc0\ub85c \ub2e4\uc74c Kotlin \ub9b4\ub9ac\uc2a4\uae4c\uc9c0 \ubb38\uc81c\uac00 \ud574\uacb0\ub418\uae30\ub97c \uae30\ub2e4\ub9ac\uc2e4 \ud544\uc694\uac00 \uc5c6\uc2b5\ub2c8\ub2e4.\r\n\uad81\uae08\ud55c \uc810\uc774 \uc788\uac70\ub098 \ud1a0\ub860\uc5d0 \ucc38\uc5ec\ud558\uace0 \uc2f6\uc740 \uacbd\uc6b0 Kotlin Slack\uc758 #eap \ucc44\ub110\uc5d0 \uc5b8\uc81c\ub4e0\uc9c0 \ucc38\uc5ec\ud558\uc138\uc694(\uc5ec\uae30\uc5d0\uc11c \ucd08\ub300\ubc1b\uae30). \uc774 \ucc44\ub110\uc5d0\uc11c \uc0c8\ub85c\uc6b4 \ud14c\uc2a4\ud2b8 \ubc84\uc804 \ube4c\ub4dc\uc5d0 \ub300\ud55c \uc54c\ub9bc\uc744 \ubc1b\uc744 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.\r\nLet\u2019s Kotlin!\r\n\uc678\ubd80 \uae30\uc5ec\uc790\r\nKoclin-reflect\uc5d0 Proguard \uad6c\uc131\uc744 \ud3ec\ud568\uc2dc\ud0a4\ub294 \ub370 \uae30\uc5ec\ud574\uc8fc\uc2e0 Zac Sweers\uaed8 \ud2b9\ud788 \uac10\uc0ac\uc758 \ub9d0\uc500\uc744 \uc804\ud569\ub2c8\ub2e4.\r\n\uc774 \ub9b4\ub9ac\uc2a4\uc5d0 \ud3ec\ud568\ub41c pull \uc694\uccad\uc744 \uc81c\uacf5\ud574 \uc8fc\uc2e0 \ubaa8\ub4e0 \uc678\ubd80 \uae30\uc5ec\uc790\ubd84\ub4e4\ub3c4 \uace0\ub9d9\uc2b5\ub2c8\ub2e4.\r\n\r\nSteven Sch\u00e4fer\r\nToshiaki Kameyama\r\npyos\r\nMads Ager\r\nMark Punzalan\r\nJuan Chen\r\nKristoffer Andersen\r\nAlfredo Delli Bovi\r\nJinseong Jeon\r\nJonathan Leitschuh\r\nSebastian Schuberth\r\nIvan Gavrilovic\r\nDavid Schreiber-Ranner\r\nMiguel Serra\r\nAlex Chmyr\r\nFleshgrinder\r\nAleksey Kladov\r\nWill Boyd\r\nDominic Fischer\r\nKenji Tomita\r\nSt\u00e9phane Nicolas\r\nTillmann Berg\r\nKevin Bierhoff\r\nTsvetan\r\n\r\n\r\n\uc774 \uac8c\uc2dc\ubb3c\uc740 Sebastian Aigner\uc758 Kotlin 1.4-M1 Released\ub97c \ubc88\uc5ed\ud55c \uae00\uc785\ub2c8\ub2e4.","protected":false},"excerpt":{"rendered":"\uc0c8 \uc8fc\uc694 \ub9b4\ub9ac\uc2a4\uc758 \uccab \ubc88\uc9f8 \ud14c\uc2a4\ud2b8 \ubc84\uc804\uc778 Kotlin 1.4-M1 \uc18c\uc2dd\uc744 \uc804\ud574\ub4dc\ub9bd\ub2c8\ub2e4.\uba87\ub2ec \uc804 \uc800\ud76c\ub294 Kotlin 1.4\uc5d0\uc11c \uae30\ub300\ud560 \uc0ac\ud56d\uc5d0 \uad00\ud574 \uc54c\ub824 \ub4dc\ub838\uc5c8\uc2b5\ub2c8\ub2e4. \uc774\uc81c \ucd9c\uc2dc\uac00 \ub2e4\uac00\uc634\uc5d0 \ub530\ub77c \uc0ac\uc6a9\uc790\uac00 \uc77c\ubd80 \uc0c8\ub85c\uc6b4 \uae30\ub2a5\uc744 \uc9c1\uc811 \uc0ac\uc6a9\ud574 \ubcfc \uc218 \uc788\ub294 \ud14c\uc2a4\ud2b8 \ubc84\uc804\uc744 \uc81c\uacf5\ud558\ub824 \ud569\ub2c8\ub2e4.\uc774 \uae00\uc5d0\uc11c\ub294 1.4-M1\uc5d0 \uc81c\uacf5\ub418\ub294 \ub2e4\uc74c\uc758 \uc0c8\ub85c\uc6b4 \uae30\ub2a5 \ubc0f \uc8fc\uc694 \uac1c\uc120 \uc0ac","protected":false},"author":{"name":"Jessie Cho","link":"https:\/\/blog.jetbrains.com\/ko\/author\/jessie-chojetbrains-com"},"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[4113],"tags":[5318],"cross-post-tag":[],"acf":[],"featured_image":null,"_links":{"self":[{"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/posts\/34043"}],"collection":[{"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/users\/964"},{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/users\/964"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/comments?post=34043"}],"version-history":[{"count":0,"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/posts\/34043\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/media?parent=34043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/categories?post=34043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/tags?post=34043"},{"taxonomy":"cross-post-tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ko\/wp-json\/wp\/v2\/cross-post-tag?post=34043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}