{"id":35230,"date":"2020-04-23T13:31:46","date_gmt":"2020-04-23T04:31:46","guid":{"rendered":"https:\/\/blog.jetbrains.com\/jp\/?p=2998"},"modified":"2020-04-23T15:26:41","modified_gmt":"2020-04-23T06:26:41","slug":"2998","status":"publish","type":"post","link":"https:\/\/blog.jetbrains.com\/ja\/2020\/04\/23\/2998\/","title":{"rendered":"Kotlin 1.3.70\u30ea\u30ea\u30fc\u30b9\u306e\u7d39\u4ecb"},"content":{"rendered":"2020\u5e743\u67083\u65e5\u306b\u516c\u958b\u3055\u308c\u305fKotlin 1.3.70\u30ea\u30ea\u30fc\u30b9\u30d6\u30ed\u30b0\u30dd\u30b9\u30c8\u306e\u7ffb\u8a33\u3067\u3059\u3002\r\n\r\n\r\n\r\n\u3053\u306e\u5897\u5206\u30ea\u30ea\u30fc\u30b9\u3067\u306f\u3001\u91cd\u8981\u306a\u65b0\u6a5f\u80fd\u306f\u63d0\u4f9b\u3057\u3066\u3044\u307e\u305b\u3093\u3002 \u305f\u3060\u3057\u3001\u65e2\u5b58\u6a5f\u80fd\u306e\u6539\u5584\u3068\u554f\u984c\u4fee\u6b63\u306b\u6700\u5584\u3092\u5c3d\u304f\u3057\u3001\u3055\u3089\u306b\u306f\u5b9f\u9a13\u7684\u6a5f\u80fd\u3082\u8ffd\u52a0\u3057\u3066\u7686\u3055\u3093\u306b\u304a\u8a66\u3057\u9802\u3051\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002 Kotlin 1.3.70\u306e\u30cf\u30a4\u30e9\u30a4\u30c8\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002\r\n\r\n\t\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306eKotlin\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u65b0\u3057\u3044\u95a2\u6570\u3068\u30af\u30e9\u30b9\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002\r\n\t*.gradle.kts\u306e\u30b5\u30dd\u30fc\u30c8\u3001\u30c6\u30b9\u30c8\u3001\u30c7\u30d0\u30c3\u30b0\u3001\u88dc\u5b8c\u306e\u6539\u5584\u306a\u3069\u3001IntelliJ Kotlin\u30d7\u30e9\u30b0\u30a4\u30f3\u306b\u3055\u307e\u3056\u307e\u306a\u6539\u5584\u3092\u5b9f\u65bd\u3057\u307e\u3057\u305f\u3002\r\n\tKotlin\/JVM\u30b3\u30f3\u30d1\u30a4\u30e9\u304cJava 8\u4ee5\u964d\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u5bfe\u3057\u3066\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u5185\u306b\u578b\u306e\u6ce8\u91c8\u3092\u751f\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\t\u30d0\u30f3\u30c9\u30eb\u306e\u6700\u9069\u5316\u3001npm\u306e\u4f9d\u5b58\u95a2\u4fc2\u5ba3\u8a00\u3001\u304a\u3088\u3073\u5f85\u3061\u671b\u307e\u308c\u3066\u3044\u305fKotlin\/JS\u306e\u65b0\u3057\u3044\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u5bfe\u5fdc\u3057\u307e\u3057\u305f\u3002\r\n\tKotlin\/Native\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u3068\u30c7\u30d0\u30c3\u30b0\u304c\u9ad8\u901f\u5316\u3055\u308c\u307e\u3057\u305f\u3002\r\n\tIDE\u304a\u3088\u3073\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3067\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u4f5c\u6210\u5bfe\u5fdc\u304c\u5f37\u5316\u3055\u308c\u307e\u3057\u305f\u3002\r\n\r\n\u5b8c\u5168\u306a\u5909\u66f4\u30ea\u30b9\u30c8\u306f\u5909\u66f4\u30ed\u30b0\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002 \u6bce\u5ea6\u306e\u3053\u3068\u306a\u304c\u3089\u3001\u5916\u90e8\u8ca2\u732e\u8005\u306e\u7686\u3055\u3093\u306b\u611f\u8b1d\u3044\u305f\u3057\u307e\u3059\u3002\r\n\r\n\u305d\u308c\u3067\u306f\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01\r\n\r\n \r\n\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u5909\u66f4\r\n\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u8ffd\u52a0\u3055\u308c\u305f\u65b0\u3057\u3044\u95a2\u6570\u306f\u3059\u3079\u3066\u5b9f\u9a13\u7684\u306a\u72b6\u614b\uff08experimental state\uff09\u3067\u3042\u308b\u3053\u3068\u306b\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002\r\n\u5171\u901a\u30e9\u30a4\u30d6\u30e9\u30ea\u306eStringBuilder\u3092\u62e1\u5f35\r\nStringBuilder\u306f\u3059\u3067\u306bkotlin.text\u30d1\u30c3\u30b1\u30fc\u30b8\u5185\u306e\u5171\u901a\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u5b58\u5728\u3057\u307e\u3059\u3002 \u3057\u304b\u3057\u3001\u591a\u304f\u306e\u91cd\u8981\u306a\u30e1\u30f3\u30d0\u30fc\u306f\u5b58\u5728\u3057\u306a\u3044\u304b\u3001JVM\u3067\u3057\u304b\u5229\u7528\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002 \u4eca\u56de\u3001\u5168JVM\u306eStringBuilder\u6a5f\u80fd\u304c\u3001\u5404\u7a2e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u5bfe\u5fdc\u3059\u308b\u5b9f\u88c5\u3068\u5171\u306b\u5171\u901a\u306eexpect class\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002 \u3064\u307e\u308a\u3001\u5fc5\u8981\u306a\u30e1\u30f3\u30d0\u30fc\u3059\u3079\u3066\u304c\u305d\u3053\u306b\u3042\u308b\u305f\u3081\u3001\u4e00\u822c\u7684\u306a\u30b3\u30fc\u30c9\u304b\u3089StringBuilder\u3092\u52b9\u7387\u3088\u304f\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\r\nKClass\u306e\u64cd\u4f5c\r\nKClass\u306e\u57fa\u672c\u7684\u304b\u3064\u4fbf\u5229\u306a\u30e1\u30f3\u30d0\u30fc\u306e\u4e00\u90e8\u304c\u3001JVM\u306ekotlin-reflect\u4f9d\u5b58\u95a2\u4fc2\u3092\u5fc5\u8981\u3068\u3057\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002\r\nimport kotlin.reflect.cast\r\n\r\n@OptIn(ExperimentalStdlibApi::class)\r\nfun main() {\r\n    val kClass = String::class\r\n    println(kClass.simpleName) \/\/ String\r\n    println(kClass.qualifiedName) \/\/ kotlin.String\r\n\r\n    println(kClass.isInstance(\"abc\")) \/\/ true\r\n    println(kClass.isInstance(10)) \/\/ false\r\n    println(kClass.cast(\"abc\")) \/\/ abc\r\n}\r\n\r\n\u4ee5\u524d\u306fKotlin\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5b9f\u88c5\u3092\u63d0\u4f9b\u3057\u3001\u305d\u308c\u3092\u52d5\u4f5c\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002 \u4eca\u56de\u306e\u30ea\u30ea\u30fc\u30b9\u306b\u3088\u308a\u3001\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u306a\u304f\u5358\u7d14\u306a\u30e1\u30f3\u30d0\u30fc\u3092\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\u5b9f\u9a13\u7684\u6ce8\u91c8\uff08@Experimental\u304a\u3088\u3073@UseExperimental\uff09\u306e\u540d\u524d\u5909\u66f4\r\n\u3054\u5b58\u3058\u306e\u3068\u304a\u308a\u3001Kotlin\u306b\u306f\u5b9f\u9a13\u7684\u6a5f\u80fd\u3092\u4f7f\u7528\u3059\u308b\u4ed5\u7d44\u307f\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u307e\u3059\u3002 \u3053\u306e\u3088\u3046\u306a\u4ed5\u7d44\u307f\u306b\u306f\u3001\u5b9f\u9a13\u7684\u5ba3\u8a00\u307e\u305f\u306f\u4ed6\u306e\u5b9f\u9a13\u7684\u5ba3\u8a00\u3092\u4f7f\u7528\u3059\u308b\u5ba3\u8a00\u3092\u30de\u30fc\u30af\u3059\u308b\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u6ce8\u91c8\u304c\u542b\u307e\u308c\u307e\u3059\u3002 \u65e7\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u3001@UseExperimental\u3068@Experimental\u304c\u6ce8\u91c8\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\r\n\r\nAPI\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u540c\u610f\u304c\u5fc5\u8981\u306a\u306e\u306f\u5b9f\u9a13\u7684\u306a\u72b6\u614b\u306b\u3042\u308b\u3082\u306e\u3060\u3051\u3068\u306f\u9650\u3089\u306a\u3044\u305f\u3081\u3001\u3053\u306e\u4ed5\u7d44\u307f\u306e\u7bc4\u56f2\u3092\u5e83\u3052\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002 \u4f8b\u3048\u3070\u3001API\u306b\u306f\u5185\u90e8\u3067\u306e\u307f\u5229\u7528\u53ef\u80fd\u306a\u3082\u306e\u3084\u3001\u5236\u9650\u304c\u3042\u308b\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002 \u3053\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3092\u53cd\u6620\u3059\u308b\u305f\u3081\u3001\u6ce8\u91c8\u306e\u540d\u524d\u3092\u5909\u66f4\u3057\u307e\u3057\u305f\u3002\u7d50\u679c\u7684\u306b\u540d\u524d@OptIn\u3068@RequiresOptIn\u304c@UseExperimental\u3068@Experimental\u3092\u7f6e\u304d\u63db\u3048\u307e\u3057\u305f\u3002 \u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u5f15\u6570\u300c-Xuse-experimental\u300d\u304c\u300c-Xopt-in\u300d\u306b\u540d\u524d\u5909\u66f4\u3055\u308c\u307e\u3057\u305f\u3002 \u300c-Xexperimental\u300d\u306f\u4f7f\u7528\u983b\u5ea6\u304c\u975e\u5e38\u306b\u4f4e\u304f\u3001\u975e\u5e38\u306b\u8907\u96d1\u5316\u3057\u3066\u3044\u308b\u306e\u3067\u5ec3\u6b62\u3057\u307e\u3057\u305f\u3002 \u53e4\u3044\u5ba3\u8a00\u3067\u3042\u308b@Experimental\u3068@UseExperimental\u306f\u5f15\u304d\u7d9a\u304d1.3.70\u3067\u3082\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u30011.4\u3067\u306f\u5ec3\u6b62\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\u3002\r\n\u5b9f\u9a13\u7684\u306a\u6642\u9593\u6e2c\u5b9aAPI\u306e\u540d\u524d\u5909\u66f4\r\n\u4eca\u56de\u884c\u3063\u305f\u3082\u3046\u4e00\u3064\u306e\u540d\u524d\u5909\u66f4\u306f\u3001Duration and Time measurement API\uff08\u671f\u9593\u3068\u6642\u9593\u6e2c\u5b9aAPI\uff09\u306b\u95a2\u3059\u308b\u3082\u306e\u3067\u3059\u3002 \u305d\u308c\u306b\u5fdc\u3058\u3066Clock\u3068ClockMark\u304cTimeSource\u3068TimeMark\u306b\u540d\u524d\u5909\u66f4\u3055\u308c\u307e\u3057\u305f\u3002 \u4ee5\u524d\u306e\u540d\u524d\u306f\u975e\u63a8\u5968\u306e\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u3068\u3057\u3066\u4fdd\u5b58\u3055\u308c\u3066\u3044\u307e\u3059\u3002\r\n\u4e21\u7aef\u30ad\u30e5\u30fc\u306e\u5b9f\u88c5\uff1aArrayDeque\r\n\u4e21\u7aef\u30ad\u30e5\u30fc\u306e\u5b9f\u88c5\u3067\u3042\u308bkotlin.collections.ArrayDeque\u30af\u30e9\u30b9\u3092Kotlin\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u8ffd\u52a0\u3057\u307e\u3057\u305f\uff01 \u3053\u306e\u5b9f\u88c5\u306f\u3053\u308c\u307e\u3067\u9577\u3089\u304f\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u304b\u3089\u6c42\u3081\u3089\u308c\u3066\u3044\u305f\u3082\u306e\u3067\u3059\u3002 Java\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306ejava.util.ArrayDeque\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3057\u305f\u304c\u3001Kotlin\/JS\u3084Kotlin\/Native\u3001\u305d\u3057\u3066\u4f55\u3088\u308a\u3082\u4e00\u822c\u7684\u306a\u30b3\u30fc\u30c9\u3067\u4f7f\u7528\u3067\u304d\u308b\u4e00\u822c\u7684\u306a\u5b9f\u88c5\u306f\u5b58\u5728\u3057\u307e\u305b\u3093\u3067\u3057\u305f\u3002 \u4eca\u56de\u306e\u30ea\u30ea\u30fc\u30b9\u3067\u306f\u3001\u5b9f\u9a13\u7684\u3067\u306f\u3042\u308a\u307e\u3059\u304c\u3053\u306e\u3088\u3046\u306a\u5b9f\u88c5\u3092\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\r\n\u4e21\u7aef\u30ad\u30e5\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u4e00\u5b9a\u306e\u511f\u5374\u6642\u9593\u5185\u306b\u30ad\u30e5\u30fc\u306e\u5148\u982d\u3068\u672b\u5c3e\u306e\u4e21\u65b9\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u30fb\u524a\u9664\u3067\u304d\u307e\u3059\u3002\r\n@OptIn(ExperimentalStdlibApi::class)\r\nfun main() {\r\n    val deque = ArrayDeque(listOf(1, 2, 3))\r\n\r\n    deque.addFirst(0)\r\n    deque.addLast(4)\r\n    println(deque) \/\/ [0, 1, 2, 3, 4]\r\n\r\n    println(deque.first()) \/\/ 0\r\n    println(deque.last()) \/\/ 4\r\n\r\n    deque.removeFirst()\r\n    deque.removeLast()\r\n    println(deque) \/\/ [1, 2, 3]\r\n}\r\n\r\n\u30b3\u30fc\u30c9\u5185\u306b\u30ad\u30e5\u30fc\u3084\u30b9\u30bf\u30c3\u30af\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u4e21\u7aef\u30ad\u30e5\u30fc\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\r\n\r\nkotlin.collections.ArrayDeque\u306e\u5b9f\u88c5\u306f\u88cf\u5074\u3067\u52d5\u7684\u914d\u5217\u3092\u4f7f\u7528\u3057\u3066\u304a\u308a\u3001\u305d\u306e\u5185\u5bb9\u3092\u5faa\u74b0\u30d0\u30c3\u30d5\u30a1\u3067\u3042\u308bArray\u306b\u4fdd\u5b58\u3057\u3001\u3053\u306eArray\u304c\u3044\u3063\u3071\u3044\u306b\u306a\u3063\u305f\u3068\u304d\u3060\u3051\u5927\u304d\u3055\u3092\u5909\u66f4\u3057\u307e\u3059\u3002\r\n\r\nArrayDeque\u306e\u5b9f\u88c5\u306f\u6982\u5ff5\u4e0a\u3001java.util.ArrayDeque\u306e\u5b9f\u88c5\u306b\u975e\u5e38\u306b\u3088\u304f\u4f3c\u3066\u3044\u307e\u3059\u3002 \u305f\u3060\u3057\u3001\u3053\u308c\u3089\u306f\u5225\u306e\u5b9f\u88c5\u3067\u3042\u308a\u3001Kotlin\/JVM\u306b\u3053\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3068\u65b0\u3057\u3044\u5b9f\u88c5\u304c\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u3053\u308c\u306f\u4ed6\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3068\u306e\u52d5\u4f5c\u3068\u306f\u7570\u306a\u308a\u3001ArrayList\u3092\u4f5c\u6210\u3057\u3066\u305d\u308c\u3092JVM\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u3068\u3001java.util.ArrayList\u30af\u30e9\u30b9\u304c\u5185\u90e8\u7684\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002 Collection\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308bJava\u306eArrayDeque\u3068\u306f\u7570\u306a\u308a\u3001Kotlin\u306eArrayDeque\u306fMutableList\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002 \u3064\u307e\u308a\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3067\u3059\u3079\u3066\u306e\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306fJava\u306eArrayDeque\u3067\u306f\u4e0d\u53ef\u80fd\u3067\u3059\u3002\r\n\r\n\u7d3a\u85cd\u306fArrayDeque\u30af\u30e9\u30b9\u3092\u5b9f\u9a13\u7684\u306a\u72b6\u614b\u3067\u30ea\u30ea\u30fc\u30b9\u3057\u3066\u3044\u307e\u3059\u3002\u7686\u3055\u3093\u306e\u3054\u610f\u898b\u3092\u304a\u5f85\u3061\u3057\u3066\u3044\u307e\u3059\uff01\r\n\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30d3\u30eb\u30c0\u30fc\r\n\u3082\u3046\u4e00\u3064\u306e\u91cd\u8981\u306a\u65b0\u6a5f\u80fd\u306f\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u7528\u306e\u30d3\u30eb\u30c0\u30fc\u95a2\u6570\uff08buildList\u3001buildSet\u3001buildMap\uff09\u3067\u3059\u3002 \u4f5c\u6210\u30d5\u30a7\u30fc\u30ba\u3067\u3053\u306e\u3088\u3046\u306a\u30d3\u30eb\u30c0\u30fc\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u4fbf\u5229\u306b\u64cd\u4f5c\u3057\u3001\u8aad\u307f\u8fbc\u307f\u5c02\u7528\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u7d50\u679c\u3068\u3057\u3066\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\r\n@OptIn(ExperimentalStdlibApi::class)\r\nfun main() {\r\n    val needsZero = true\r\n    val initial = listOf(2, 6, 41)\r\n\r\n    val ints = buildList { \/\/ this: MutableList\r\n        if (needsZero) {\r\n            add(0)\r\n        }\r\n        initial.mapTo(this) { it + 1 }\r\n    }\r\n    println(ints) \/\/ [0, 3, 7, 42]\r\n}\r\n\r\n\u3053\u308c\u3089\u306e\u30d3\u30eb\u30c0\u30fc\u95a2\u6570\u306fbuildString\u3068\u540c\u69d8\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u3002 buildList\u306f\u30ec\u30b7\u30fc\u30d0\u3092\u542b\u3080\u30e9\u30e0\u30c0\u3092\u5f15\u6570\u306b\u53d6\u308a\u307e\u3059\u3002 \u30e9\u30e0\u30c0\u5185\u306e\u6697\u9ed9\u7684\u306a \u201cthis\u201d \u30ec\u30b7\u30fc\u30d0\u306f\u578bMutableList\u3092\u6301\u3061\u307e\u3059\u304c\u3001buildList\u306f\u8aad\u307f\u8fbc\u307f\u5c02\u7528\u306eList\u3092\u7d50\u679c\u3068\u3057\u3066\u8fd4\u3057\u307e\u3059\u3002\r\n\r\n\u6761\u4ef6\u306e\u4f7f\u7528\u3001\u8907\u6570\u306e\u521d\u671f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5909\u66f4\u3001\u7d50\u679c\u306e\u30de\u30fc\u30b8\u3068\u3044\u3063\u305f\u8907\u96d1\u306a\u64cd\u4f5c\u3092\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3001\u30d3\u30eb\u30c0\u30fc\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u5f80\u3005\u306b\u3057\u3066\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u70b9\u3067\u3088\u308a\u52b9\u7387\u304c\u4e0a\u304c\u308a\u307e\u3059\u3002 \u73fe\u5728\u3001\u3053\u308c\u3089\u306e\u95a2\u6570\u3082\u5b9f\u9a13\u7684\u306a\u72b6\u614b\u3067\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u3066\u3044\u307e\u3059\u3002\r\nreduceOrNull()\u304a\u3088\u3073randomOrNull()\u5bfe\u7167\u95a2\u6570\r\nKotlin\u306b\u306fstring.toInt()\u3068string.toIntOrNull()\u306e\u3088\u3046\u306b\u3001\u7247\u65b9\u304c\u6f14\u7b97\u4e0d\u53ef\u80fd\u306a\u5834\u5408\u306b\u306f\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3057\u3001\u3082\u3046\u7247\u65b9\u306fnull\u3092\u8fd4\u3059\u95a2\u6570\u306e\u30da\u30a2\u3092\u6301\u305f\u305b\u308b\u3068\u3044\u3046\u898f\u5247\u304c\u3042\u308b\u3053\u3068\u3092\u3054\u5b58\u3058\u304b\u3068\u601d\u3044\u307e\u3059\u3002 \u540c\u3058\u898f\u5247\u306b\u5f93\u3063\u3066\u3001\u65b0\u3057\u3044randomOrNull()\u304a\u3088\u3073reduceOrNull()\u306e\u30da\u30a2\u3068\u306a\u308b\u95a2\u6570\u3092\u8ffd\u52a0\u3057\u307e\u3057\u305f\u3002\r\n@OptIn(ExperimentalStdlibApi::class)\r\nfun main() {\r\n    val list = listOf(1, 2, 3)\r\n    println(list.randomOrNull()) \/\/ 2\r\n    println(list.reduceOrNull { a, b -> a + b }) \/\/ 6\r\n\r\n    val emptyList = emptyList<Int>()\r\n    println(emptyList.randomOrNull()) \/\/ null\r\n    println(emptyList.reduceOrNull { a, b -> a + b }) \/\/ null\r\n}\r\n\r\nrandom()\u00a0\u304a\u3088\u3073\u00a0reduce()\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u7a7a\u306e\u5834\u5408\u306b\u4f8b\u5916\u304c\u767a\u751f\u3057\u307e\u3059\u3002\r\nscan() \u95a2\u6570\r\n\u30ea\u30b9\u30c8\u3068\u30b7\u30fc\u30b1\u30f3\u30b9\u3092\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u65b0\u3057\u3044\u95a2\u6570\u30bb\u30c3\u30c8\u3092\u8ffd\u52a0\u3057\u3066\u3044\u307e\u3059\u3002 \u3053\u308c\u3089\u306f\u300c\u30b9\u30ad\u30e3\u30cb\u30f3\u30b0\u300d\u306e\u6982\u5ff5\u3092\u8868\u3059\u3082\u306e\u3067\u3001\u540c\u69d8\u306e\u95a2\u6570\u306f\u3059\u3067\u306b\u5225\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3084\u8a00\u8a9e\u306b\u5b58\u5728\u3057\u307e\u3059\u3002\r\n\r\nscan() \u306f fold() \u3068\u5bc6\u63a5\u306b\u95a2\u9023\u3057\u3066\u3044\u307e\u3059\u3002 scan() \u3068 fold() \u306f\u3069\u3061\u3089\u3082\u5024\u306e\u30b7\u30fc\u30b1\u30f3\u30b9\u306b\u6240\u5b9a\u306e\u4e8c\u9805\u6f14\u7b97\u3092\u9069\u7528\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u3001scan() \u304c\u4e2d\u9593\u7d50\u679c\u306e\u30b7\u30fc\u30b1\u30f3\u30b9\u5168\u4f53\u3092\u8fd4\u3059\u306e\u306b\u5bfe\u3057\u3066 fold() \u306f\u6700\u7d42\u7d50\u679c\u306e\u307f\u3092\u8fd4\u3059\u3068\u3044\u3046\u70b9\u304c\u7570\u306a\u308a\u307e\u3059\u3002\r\n@OptIn(ExperimentalStdlibApi::class)\r\nfun main() {\r\n    val ints = (1..4).asSequence()\r\n    println(ints.fold(0) { acc, elem -> acc + elem }) \/\/ 10\r\n\r\n    val sequence = ints.scan(0) { acc, elem -> acc + elem }\r\n    println(sequence.toList()) \/\/ [0, 1, 3, 6, 10]\r\n}\r\n\r\nfold\u306e\u3088\u3046\u306b\u3001scan\u306f\u6700\u521d\u306e\u30a2\u30ad\u30e5\u30e0\u30ec\u30fc\u30bf\u5024\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\r\n\r\n\r\n\r\n\u7d50\u679c\u306e\u578b\u304c\u8981\u7d20\u306e\u578b\u3068\u540c\u3058\u3067\u6700\u521d\u306e\u8981\u7d20\u3092\u521d\u671f\u5024\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u308b\u5834\u5408\u3001reduce() \u304a\u3088\u3073 scanReduce() \u95a2\u6570\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\r\n\r\n\r\n\r\n\u30b7\u30fc\u30b1\u30f3\u30b9\u3067 scan() \u3068 scanReduce() \u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\u306f\u7d50\u679c\u3068\u3057\u3066\u30b7\u30fc\u30b1\u30f3\u30b9\u304c\u8fd4\u3055\u308c\u307e\u3059\u304c\u3001\u672c\u8cea\u7684\u306b\u306f\u9045\u5ef6\u3057\u307e\u3059\u3002 \u3064\u307e\u308a\u3001\u30b9\u30ad\u30e3\u30f3\u30d7\u30ed\u30bb\u30b9\u306f\u7d50\u679c\u30b7\u30fc\u30b1\u30f3\u30b9\u304b\u3089\u30c7\u30fc\u30bf\u3092\u8981\u6c42\u3057\u305f\u3068\u304d\u3060\u3051\u3001\u5177\u4f53\u7684\u306b\u306ftoList()\u3084max()\u306e\u3088\u3046\u306a\u7d42\u7aef\u64cd\u4f5c\uff08\u5225\u306e\u30b7\u30fc\u30b1\u30f3\u30b9\u4ee5\u5916\u306e\u4f55\u304b\u3092\u8fd4\u3059\u3082\u306e\uff09\u3092\u547c\u3073\u51fa\u3057\u305f\u3068\u304d\u3060\u3051\u958b\u59cb\u3057\u307e\u3059\u3002 \u30ea\u30b9\u30c8\u3067 scan() \u3068 scanReduce() \u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\u306f\u30ea\u30b9\u30c8\u304c\u7d50\u679c\u3068\u3057\u3066\u8fd4\u3055\u308c\u307e\u3059\u3002\r\n\r\n\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u3053\u3061\u3089\u306eKEEP\u3092\u304a\u8aad\u307f\u304f\u3060\u3055\u3044\u3002\r\nIntelliJ IDEA\u306e\u5bfe\u5fdc\r\n\u3053\u306e\u30ea\u30ea\u30fc\u30b9\u3067\u306f\u3001IntelliJ IDEA\u306eKotlin\u5bfe\u5fdc\u306b\u95a2\u3059\u308b\u8907\u6570\u306e\u6539\u5584\u304c\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002 \u305d\u306e\u4e2d\u3067\u3082\u7279\u306b\u91cd\u8981\u306a\u3082\u306e\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\r\n*.gradle.kts \u5bfe\u5fdc\r\n1.3.70\u3067\u306fIntelliJ IDEA\u306eGradle Kotlin DSL\u30b9\u30af\u30ea\u30d7\u30c8\uff08*.gradle.kts\u30d5\u30a1\u30a4\u30eb\uff09\u5bfe\u5fdc\u3092\u6539\u5584\u3057\u307e\u3057\u305f\u3002 \u305d\u306e\u7d50\u679c\u3001\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u306eKotlin\u30d7\u30e9\u30b0\u30a4\u30f3\u3067\u306f\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u30cf\u30a4\u30e9\u30a4\u30c8\u3001\u88dc\u5b8c\u3001\u691c\u7d22\u3001\u304a\u3088\u3073Kotlin\u30d3\u30eb\u30c9\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u51e6\u7406\u306b\u95a2\u3059\u308b\u305d\u306e\u4ed6\u8981\u7d20\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u6539\u5584\u3055\u308c\u307e\u3057\u305f\u3002 \u8a73\u7d30\u306a\u6539\u5584\u306e\u30ec\u30d3\u30e5\u30fc\u306f\u3001\u3053\u3061\u3089\u306e\u30d6\u30ed\u30b0\u6295\u7a3f\u306b\u8a18\u8f09\u3057\u3066\u3044\u307e\u3059\u3002\r\n\u3059\u3079\u3066\u306e\u5909\u66f4\u3084\u6539\u5584\u306b\u3088\u308b\u30e1\u30ea\u30c3\u30c8\u3092\u53d7\u3051\u308b\u306b\u306f\u3001IntelliJ IDEA 2019.2\u4ee5\u964d\u3068Gradle 6.0\u4ee5\u964d\u3092\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\n\u30b3\u30fc\u30c9\u88dc\u5b8c\r\n1.3.70\u3067\u306f\u3001IntelliJ IDEA\u306eKotlin\u30b3\u30fc\u30c9\u88dc\u5b8c\u3092\u5927\u5e45\u306b\u6539\u5584\u3057\u3066\u3044\u307e\u3059\u3002 \u3053\u306e\u30ea\u30ea\u30fc\u30b9\u3067\u306f\u3001\u62e1\u5f35\u95a2\u6570\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ec\u30d9\u30eb\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u306a\u3069\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u3067\u5ba3\u8a00\u3055\u308c\u305f\u95a2\u6570\u306e\u307b\u304b\u3001\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u3067\u5ba3\u8a00\u3055\u308c\u305f\u95a2\u6570\u3082\u88dc\u5b8c\u5019\u88dc\u306b\u542b\u307e\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\r\n\r\n\r\n\u307e\u305f\u3001\u88dc\u5b8c\u30ea\u30b9\u30c8\u3092\u4e26\u3079\u66ff\u3048\u308b\u6a5f\u68b0\u5b66\u7fd2\u30e2\u30c7\u30eb\u3082\u6539\u5584\u3057\u3001\u6700\u3082\u95a2\u9023\u6027\u306e\u9ad8\u3044\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u4e00\u756a\u4e0a\u306b\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u3002\r\n\u65b0\u3057\u3044\u30ab\u30e9\u30fc\u30b9\u30ad\u30fc\u30e0\r\n\u30a8\u30c7\u30a3\u30bf\u3067Kotlin\u30b3\u30fc\u30c9\u306e\u5916\u89b3\u3092\u304a\u597d\u307f\u306b\u5408\u308f\u305b\u3066\u5909\u66f4\u3067\u304d\u308b\u3088\u3046\u3001\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u53ef\u80fd\u306a\u65b0\u3057\u3044\u30ab\u30e9\u30fc\u30b9\u30ad\u30fc\u30e0\u3092\u8ffd\u52a0\u3057\u307e\u3057\u305f\u3002 \u5177\u4f53\u7684\u306b\u306f\u3001suspend\u306e\u95a2\u6570\u547c\u3073\u51fa\u3057\u3068\u30d7\u30ed\u30d1\u30c6\u30a3\u5ba3\u8a00\u306b\u72ec\u81ea\u306e\u30ab\u30e9\u30fc\u30b9\u30ad\u30fc\u30e0\u3092\u8a2d\u5b9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\r\n\u30c7\u30d0\u30c3\u30b0\u306e\u6539\u5584\r\n\u65e7\u30d0\u30fc\u30b8\u30e7\u30f3\u306eKotlin\/Native\u30c7\u30d0\u30c3\u30b0\u306b\u306f\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u306e\u7a2e\u985e\u304c\u8907\u6570\u5b58\u5728\u3057\u3066\u3044\u305f\u305f\u3081\u3001\u3069\u306e\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u3092\u4f7f\u7528\u3059\u3079\u304d\u304b\u3068\u3044\u3063\u305f\u3068\u3044\u3063\u305f\u8ff7\u3044\u304c\u751f\u3058\u308b\u539f\u56e0\u3068\u306a\u3063\u3066\u3044\u307e\u3057\u305f\u3002 \u4e00\u7a2e\u985e\u306e\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u300cKotlin Line Breakpoint\u300d\u3092JVM\u3068Native\u306e\u5404\u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\nKotlin\/JS\u3068Kotlin\/Native\u306e\u30c6\u30b9\u30c8\r\nKotlin\/JS\u3068Kotlin\/Native\u306e\u30c6\u30b9\u30c8\u7d50\u679c\u304c\u3001Kotlin\/JVM\u306e\u30c6\u30b9\u30c8\u3068\u540c\u69d8\u306bIntelliJ IDEA\u306e\u53f3\u5074\u306b\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u3055\u3089\u306b\u3001Kotlin\/JS\u306e\u30c6\u30b9\u30c8\u30d5\u30a3\u30eb\u30bf\u3092\u4fee\u6b63\u3057\u3066\u500b\u5225\u30c6\u30b9\u30c8\u3092\u5b9f\u884c\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u3002\u307e\u305f\u3001iOS\u30b7\u30df\u30e5\u30ec\u30fc\u30bf\u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u3068\u3059\u308bKotlin\/Native\u30c6\u30b9\u30c8\u3092\u3064\u3044\u306b\u300cPlay\u300d\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u76f4\u63a5\u8d77\u52d5\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u3002\r\n\r\n\r\n\r\n\u3055\u3089\u306b\u3001IntelliJ IDEA Ultimate\u3067\u306f\u30c6\u30b9\u30c8\u5ba3\u8a00\u8fd1\u304f\u306e\u30a2\u30a4\u30b3\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066Kotlin\/JS\u306e\u30c7\u30d0\u30c3\u30b0\u3092\u8d77\u52d5\u3067\u304d\u307e\u3059\u3002\r\n\r\n\r\n\r\n\u307e\u305f\u306f\u3001Gradle\u30c4\u30fc\u30eb\u30a6\u30a3\u30f3\u30c9\u30a6\u3067nodeRun\u3001nodeTest\u3001browserTest\u306e\u3044\u305a\u308c\u304b\u306e\u30bf\u30b9\u30af\u3092\u624b\u52d5\u3067\u9078\u629e\u3057\u3066\u30c7\u30d0\u30c3\u30b0\u3092\u8d77\u52d5\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002 browserRun\u306e\u5834\u5408\u306f\u3001Attach to Node.js\/Chrome\u5b9f\u884c\u69cb\u6210\u3092\u4f7f\u7528\u3057\u3066\u958b\u767a\u30b5\u30fc\u30d0\u30fc\u3092\u8d77\u52d5\u3057\u305f\u5f8c\u306b\u30c7\u30d0\u30c3\u30ac\u3092\u63a5\u7d9a\u3067\u304d\u307e\u3059\u3002\r\n\u305d\u306e\u4ed6\u306e\u6ce8\u76ee\u3059\u3079\u304d\u6539\u5584\r\n\u4ed6\u306b\u3082IntelliJ IDEA\u306eKotlin\u5bfe\u5fdc\u306b\u95a2\u3059\u308b\u6539\u5584\u304c\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002 \u3053\u3053\u3067\u306f\u8a00\u53ca\u3059\u308b\u4fa1\u5024\u306e\u3042\u308b\u3082\u306e\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\r\n\r\n\t\u30d5\u30a1\u30a4\u30eb\u89e3\u6790\u3068\u30b3\u30d4\u30fc\u30da\u30fc\u30b9\u30c8\u64cd\u4f5c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6539\u5584\u3057\u307e\u3057\u305f\u3002\r\n\t\u7121\u610f\u5473\u306a\u5358\u9805\u6f14\u7b97\u5b50\u306b\u5bfe\u5fdc\u3057\u305f\u65b0\u3057\u3044\u30a4\u30f3\u30b9\u30da\u30af\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3057\u307e\u3057\u305f\u3002 \u3053\u306e\u30a4\u30f3\u30b9\u30da\u30af\u30b7\u30e7\u30f3\u306f\u9577\u3044\u5f0f\u3092\u8907\u6570\u884c\u306b\u5206\u5272\u3059\u308b\u969b\u306b\u8868\u793a\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\r\n\r\n\t\u547c\u3073\u51fa\u3057\u30c1\u30a7\u30fc\u30f3\u3001\u6539\u884c\u3001\u30b9\u30da\u30fc\u30b9\u3001\u30b3\u30e1\u30f3\u30c8\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u542b\u3080\u3055\u307e\u3056\u307e\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u6539\u5584\u3057\u307e\u3057\u305f\u3002\r\n\r\nKotlin\/JVM\r\nKotlin\u306fJVM\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\uff08\u30bf\u30fc\u30b2\u30c3\u30c8\u30d0\u30fc\u30b8\u30e7\u30f31.8\u4ee5\u964d\uff09\u3067\u578b\u306e\u6ce8\u91c8\uff08type annotation\uff09\u3092\u751f\u6210\u3057\u3001\u305d\u308c\u3092\u5b9f\u884c\u6642\u306b\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u3053\u306e\u6a5f\u80fd\u306f\u4e00\u90e8\u306e\u65e2\u5b58Java\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u306f\u308b\u304b\u306b\u4f7f\u3044\u3084\u3059\u304f\u3057\u3001\u65b0\u3057\u3044\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4f5c\u6210\u8005\u3092\u3088\u308a\u5f37\u529b\u306b\u652f\u63f4\u3059\u308b\u305f\u3081\u3001\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u304b\u3089\u9577\u3089\u304f\u8981\u671b\u304c\u3042\u304c\u3063\u3066\u3044\u307e\u3057\u305f\u3002\r\n\r\n\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\u3001String \u578b\u306e @Foo \u6ce8\u91c8\u3092\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u306b\u51fa\u529b\u3057\u3066\u30e9\u30a4\u30d6\u30e9\u30ea\u30b3\u30fc\u30c9\u3067\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\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\u578b\u306e\u6ce8\u91c8\u3092\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u306b\u51fa\u529b\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u306b\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\u3002\r\n\r\n\t\u5ba3\u8a00\u3057\u305f\u6ce8\u91c8\u306b\u9069\u5207\u306a\u6ce8\u91c8\u5bfe\u8c61\uff08Java\u306eElementType.TYPE_USE\u307e\u305f\u306fKotlin\u306eAnnotationTarget.TYPE\uff09\u3068\u4fdd\u5b58\u8a2d\u5b9a\uff08AnnotationRetention.RUNTIME\uff09\u304c\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\n\t\u6ce8\u91c8\u30af\u30e9\u30b9\u306e\u5ba3\u8a00\u3068\u305d\u306e\u6ce8\u91c8\u3092\u4f7f\u7528\u3059\u308b\u30b3\u30fc\u30c9\uff08\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u30af\u30e9\u30b9A\uff09\u306e\u4e21\u65b9\u3092JVM\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u30bf\u30fc\u30b2\u30c3\u30c8\u30d0\u30fc\u30b8\u30e7\u30f31.8\u4ee5\u4e0a\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u307e\u3059\u3002 \u3053\u308c\u306f -jvm-target=1.8 \u30b3\u30f3\u30d1\u30a4\u30e9\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002\r\n\t-Xemit-jvm-type-annotations 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Foo>\u3001Array<@Ann Foo>\u306a\u3069\uff09\u3002\r\n\r\n\u4eca\u5f8c\u3001\u5171\u5909\uff08covariant\uff09\u304a\u3088\u3073\u53cd\u5909\uff08contravariant\uff09\u306a\u578b\u6295\u5f71\u3068\u5185\u90e8\u578b\uff08inner type\uff09\uff08Smth<@Ann Outer.Inner>\u306a\u3069\uff09\u306e\u6ce8\u91c8\u306b\u5bfe\u3059\u308b\u578b\u6ce8\u91c8\u306e\u751f\u6210\u306b\u5bfe\u5fdc\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002 \u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30b1\u30fc\u30b9\u306f\u3059\u3067\u306b\u307b\u3068\u3093\u3069\u306e\u5b9f\u969b\u306e\u30b7\u30ca\u30ea\u30aa\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u304c\u3001\u3088\u308a\u8907\u96d1\u306a\u30b1\u30fc\u30b9\u3067\u578b\u6ce8\u91c8\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u304a\u77e5\u3089\u305b\u304f\u3060\u3055\u3044\u3002\r\nKotlin\/JS\r\nKotlin 1.3.70\u3067\u306f\u3001JavaScript\u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u30d0\u30f3\u30c9\u30eb\u30b5\u30a4\u30ba\u306e\u70b9\u3067\u8907\u6570\u306e\u5927\u5e45\u306a\u6700\u9069\u5316\u304c\u884c\u308f\u308c\u3001\u4f9d\u5b58\u30d5\u30a1\u30a4\u30eb\u3001\u30ea\u30bd\u30fc\u30b9\u3001\u304a\u3088\u3073\u30c6\u30b9\u30c8\u306e\u51e6\u7406\u65b9\u6cd5\u95a2\u3057\u3066\u4f5c\u696d\u54c1\u8cea\u3092\u6539\u5584\u3059\u308b\u3044\u304f\u3064\u304b\u306e\u5909\u66f4\u304c\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002 \u307e\u305f\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u5168\u9762\u7684\u306b\u6539\u8a02\u3057\u307e\u3057\u305f\u3002\r\n\u30d0\u30f3\u30c9\u30eb\u306e\u6700\u9069\u5316\r\nKotlin 1.3.70\u304b\u3089\u306fDCE\uff08Dead Code Elimination\u3001\u30c7\u30c3\u30c9\u30b3\u30fc\u30c9\u524a\u9664\uff09\u304c org.jetbrains.kotlin.js Gradle \u30d7\u30e9\u30b0\u30a4\u30f3\u304b\u3089\u7c21\u5358\u306b\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u624b\u52d5\u3067\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002 \u307e\u305f\u3001JS\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u6700\u9069\u5316\u3068\u5b9f\u884c\u3092\u5236\u5fa1\u3059\u308b\u306e\u306b\u4f7f\u7528\u3067\u304d\u308b\u65b0\u3057\u3044\u30bf\u30b9\u30af\u4e00\u5f0f\u304c\u5b9f\u88c5\u3055\u308c\u307e\u3057\u305f\u3002\r\n\r\n\u958b\u767a\u4e2d\u306fbrowserDevelopmentRun\u3092\u4f7f\u7528\u3057\u3066\u30d0\u30f3\u30c9\u30eb\u3055\u308c\u305f\u958b\u767a\u30b5\u30fc\u30d0\u30fc\u3067\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u884c\u3092\u958b\u59cb\u3057\u3001browserDevelopmentWebpack\u3092\u4f7f\u7528\u3057\u3066build\/distributions\u30d5\u30a9\u30eb\u30c0\u5185\u306b\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d0\u30f3\u30c9\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002 \u6700\u9069\u5316\u3092\u4e00\u5207\u5b9f\u884c\u3057\u306a\u3044\u5834\u5408\u306f\u3088\u308a\u9ad8\u901f\u306b\u30d3\u30eb\u30c9\u3055\u308c\u307e\u3059\u304c\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u304c\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002\r\n\r\n\u672c\u756a\u306e\u6e96\u5099\u3092\u3059\u308b\u969b\u306f\u3001browserProductionRun\u3092\u4f7f\u7528\u3057\u3066\u6700\u9069\u5316\u3055\u308c\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u884c\u3092\u958b\u59cb\u3057\u3001browserProductionWebpack\u3092\u4f7f\u7528\u3057\u3066\u672c\u756a\u3067\u306e\u30c7\u30d7\u30ed\u30a4\u306b\u9069\u3057\u305f\u6700\u9069\u5316\u3055\u308c\u305f\u30d0\u30f3\u30c9\u30eb\u3092\u751f\u6210\u3057\u307e\u3059\u3002 \u672c\u756a\u30d3\u30eb\u30c9\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u306b\u306f\u82e5\u5e72\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u304c\u3001\u6700\u7d42\u7684\u306b\u306f\u958b\u767a\u30d3\u30eb\u30c9\u3088\u308a\u3082\u5927\u5e45\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u30d0\u30f3\u30c9\u30eb\u306b\u306a\u308a\u307e\u3059\u3002\r\n\r\n\r\n\r\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\r\n\u958b\u767a\u30d3\u30eb\u30c9\uff08gzip\uff09\r\n\u672c\u756a\u30d3\u30eb\u30c9\uff08gzip\uff09\r\n\r\n\r\n\r\n\r\n\u201cHello, World\u201d\r\n963 KiB\r\n14 KiB\r\n\r\n\r\nKotlin\/React Example\uff08\u201cCodeQuiz\u201d\uff09\r\n4.1 MiB\r\n345 KiB\r\n\r\n\r\n\r\n\u4ee5\u524d\u306eGradle\u30bf\u30b9\u30af\u3067\u3042\u308bbrowserRun\uff08\u73fe\u5728\u306fbrowserDevelopmentRun\u306e\u30a8\u30a4\u30ea\u30a2\u30b9\uff09\u3068browserWebpack\uff08\u73fe\u5728\u306fbrowserProductionWebpack\u306e\u30a8\u30a4\u30ea\u30a2\u30b9\uff09\u306f\u5f15\u304d\u7d9a\u304d\u4f7f\u7528\u3067\u304d\u307e\u3059\u304c\u3001\u30d3\u30eb\u30c9\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u3044\u305a\u308c\u304b\u306b\u65b0\u305f\u306b\u8ffd\u52a0\u3055\u308c\u305f\u540c\u7b49\u306e\u30bf\u30b9\u30af\u3068\u7f6e\u304d\u63db\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\r\n\r\n\u3053\u308c\u3089\u306eGradle\u30bf\u30b9\u30af\u306f\u3001multiplatform \u307e\u305f\u306f kotlin.js Gradle\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u4f7f\u7528\u3059\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5229\u7528\u3067\u304d\u307e\u3059\u3002 kotlin.js\u306e\u5834\u5408\u3001\u3088\u308a\u77ed\u3044\u5f62\u5f0f\u306e\u30bf\u30b9\u30af\u30a8\u30a4\u30ea\u30a2\u30b9\uff08browserDevelopmentRun\u7528\u306erun\u3068browserProductionWebpack\u7528\u306ebuild\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\r\n\r\nKotlin\/JS\u306e\u30c7\u30c3\u30c9\u30b3\u30fc\u30c9\u524a\u9664\u3068\u305d\u306e\u5fae\u8abf\u6574\u65b9\u6cd5\u306b\u95a2\u3059\u308b\u8a73\u7d30\u3092\u77e5\u308b\u306b\u306f\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\n\u30ea\u30bd\u30fc\u30b9\u306e\u81ea\u52d5\u30b3\u30d4\u30fc\r\ndistributions\u30d5\u30a9\u30eb\u30c0\u306b\u30d0\u30f3\u30c9\u30eb\u3092\u4f5c\u6210\u3059\u308b\u30d3\u30eb\u30c9\u30bf\u30b9\u30af\uff08browserProductionWebpack\u306a\u3069\uff09\u304cresources\u30d5\u30a9\u30eb\u30c0\u304b\u3089\u5168\u30a2\u30bb\u30c3\u30c8\u3092\u30b3\u30d4\u30fc\u3059\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u305f\u3081\u3001\u30c7\u30d7\u30ed\u30a4\u53ef\u80fd\u306a\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u4e00\u5f0f\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u753b\u50cf\u3001\u30b9\u30bf\u30a4\u30eb\u30b7\u30fc\u30c8\u305d\u306e\u4ed6\u3092\u624b\u52d5\u3067\u30b3\u30d4\u30fc\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002\r\n\u3088\u308a\u30b9\u30e0\u30fc\u30ba\u306anpm\u306e\u4f9d\u5b58\u95a2\u4fc2\u5ba3\u8a00\u5bfe\u5fdc\r\nKotlin\/JS Gradle\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u4f7f\u7528\u3059\u308b\u969b\u3001npm\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u30e1\u30a4\u30f3\u306e\u30bd\u30fc\u30b9\u30bb\u30c3\u30c8\u306b\u624b\u52d5\u3067\u8ffd\u52a0\u3059\u308b\u4ee3\u308f\u308a\u306b\u6700\u4e0a\u4f4d\u306e\u4f9d\u5b58\u95a2\u4fc2\u30d6\u30ed\u30c3\u30af\u5185\u3067\u5ba3\u8a00\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u3064\u307e\u308a\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b9\u30cb\u30da\u30c3\u30c8\u304c\u6709\u52b9\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\ndependencies {\r\n    implementation(npm(\"react\", \"16.12.0\"))\r\n}\r\n\r\nGradle\u7d4c\u7531\u306e\u5b9f\u9a13\u7684\u306a\u30c6\u30b9\u30c8\u306e\u30c7\u30d0\u30c3\u30b0\r\nIntelliJ IDEA\u304b\u3089Kotlin\/JS\u30d6\u30e9\u30a6\u30b6\u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u3068\u3059\u308b\u30c6\u30b9\u30c8\u3092\u76f4\u63a5\u30c7\u30d0\u30c3\u30b0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u4e0d\u5408\u683c\u306b\u306a\u3063\u305f\u30c6\u30b9\u30c8\u3092\u30c7\u30d0\u30c3\u30b0\u3059\u308b\u306b\u306f\u3001IDE\u3067\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u3092\u8a2d\u5b9a\u3057\u3001\u30c7\u30d0\u30c3\u30b0\u30e2\u30fc\u30c9\u3067check Gradle\u30bf\u30b9\u30af\u3092\u958b\u59cb\u3059\u308b\u304b\u3001\u30ac\u30bf\u30fc\u30a2\u30a4\u30b3\u30f3\u3092\u4f7f\u7528\u3057\u3066\u30c6\u30b9\u30c8\u30bb\u30c3\u30c8\u3092\u30c7\u30d0\u30c3\u30b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002 Gradle\u306f\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u7528\u306e\u30c6\u30b9\u30c8\u30bf\u30b9\u30af\u3092\u5b9f\u884c\u3057\u3001\u30c7\u30d0\u30c3\u30ac\u306f\u5408\u6210\u306e\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u3067\u505c\u6b62\u3057\u307e\u3059\u3002 Gradle\u304c\u30b3\u30f3\u30bd\u30fc\u30eb\u306bbrowserTest\u30bf\u30b9\u30af\u3092\u8868\u793a\u3059\u308b\u3068\u3059\u3050\u306b\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u306b\u30d2\u30c3\u30c8\u3057\u307e\u3059\u3002\r\n> Task :browserTest\r\n\r\n\u3053\u306e\u6642\u70b9\u3067\u30c7\u30d0\u30c3\u30ac\u306e\u300c:browserTest\u300d\u30bb\u30c3\u30b7\u30e7\u30f3\u306b\u5207\u308a\u66ff\u3048\u3001\u300cDebugger\u300d\u3068\u3044\u3046\u30e9\u30d9\u30eb\u306e\u30bf\u30d6\u3092\u9078\u629e\u3057\u307e\u3059\u3002 \u300cResume Program\u300d\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u30c6\u30b9\u30c8\u306e\u5b9f\u884c\u304c\u958b\u59cb\u3057\u307e\u3059\u3002\r\n\r\n\r\n\r\n\u73fe\u5728\u3001\u3053\u306e\u624b\u9806\u306fIntelliJ IDEA\u306e\u30c7\u30d0\u30c3\u30ac\u3068JS\u30a8\u30f3\u30b8\u30f3\u3068\u306e\u540c\u671f\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u3067\u3059\u3002 \u79c1\u305f\u3061\u306f\u3053\u306e\u30c7\u30d0\u30c3\u30b0\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u958b\u59cb\u624b\u9806\u304c\u591a\u3059\u304e\u308b\u3053\u3068\u3092\u8a8d\u8b58\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u4eca\u5f8c\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3088\u308a\u30b9\u30e0\u30fc\u30ba\u306b\u30c7\u30d0\u30c3\u30b0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u307e\u3067\u304a\u5f85\u3061\u304f\u3060\u3055\u3044\uff01\r\n\r\n\u307e\u305f\u3001\u6b8b\u3063\u3066\u3044\u308b\u8ab2\u984c\u306e\u3044\u304f\u3064\u304b\u3092\u89e3\u6c7a\u3057\u305f\u5f8c\u306bNode.js\u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u3068\u3059\u308bKotlin\u30b3\u30fc\u30c9\u306e\u30c7\u30d0\u30c3\u30b0\u306b\u3064\u3044\u3066\u3082\u540c\u69d8\u306e\u5bfe\u5fdc\u3092\u884c\u3046\u4e88\u5b9a\u3067\u3059\u3002\r\n\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u6539\u5584\r\nKotlin 1.3.70\u3067\u306f\u3001JavaScript\u30bf\u30fc\u30b2\u30c3\u30c8\u5411\u3051\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3068\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u306b\u5f85\u3061\u671b\u307e\u308c\u3066\u3044\u305f\u5909\u66f4\u3092\u52a0\u3048\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001Kotlin\/JS\u306b\u4f7f\u3044\u59cb\u3081\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u3092\u9858\u3063\u3066\u3044\u307e\u3059\u3002 \u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u6700\u65b0\u306e\u5185\u5bb9\u306b\u66f4\u65b0\u3057\u3001\u53e4\u3044\u5185\u5bb9\u3092\u524a\u9664\u3057\u307e\u3057\u305f\u3002 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\u30cf\u30f3\u30ba\u30aa\u30f3\u30b3\u30fc\u30b9\u300cReact\u3068Kotlin\/JS\u3092\u4f7f\u7528\u3057\u305f\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u69cb\u7bc9\u300d\u3082\u66f4\u65b0\u3055\u308c\u3001Gradle\u7528\u306eKotlin\/JS\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u4f7f\u3044\u65b9\u3092\u5b66\u7fd2\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\r\n\u3053\u308c\u3089\u306e\u5909\u66f4\u306b\u3088\u3063\u3066\u3001Kotlin\/JS\u3092\u7279\u306b\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u958b\u767a\u306b\u8a66\u3057\u305f\u3044\u3068\u304a\u8003\u3048\u306e\u65b9\u304c\u7c21\u5358\u306b\u4f5c\u696d\u3092\u958b\u59cb\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u3092\u9858\u3063\u3066\u3044\u307e\u3059\u3002 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1.3.70\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5272\u308a\u5f53\u3066\u306e\u6642\u9593\u3092\u82e5\u5e72\u524a\u6e1b\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u30011\u3064\u306e\u30b9\u30bf\u30c3\u30af\u306b\u3088\u308a\u591a\u304f\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308a\uff08\u30d2\u30fc\u30d7\u5272\u308a\u5f53\u3066\u3088\u308a\u3082\u9ad8\u901f\uff09\u3001\u4e00\u90e8\u306e\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u4f5c\u6210\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 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\u3053\u308c\u306b\u3088\u3063\u3066\u3001\u4eba\u6c17\u306eApple\u88fd\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\uff08Accelerate\u3068SpriteKit\uff09\u306a\u3069\u3001\u3088\u308a\u591a\u304f\u306e\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3API\u3092Kotlin\/Native\u304b\u3089\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\u30b9\u30af\u30ea\u30d7\u30c8\u4f5c\u6210\r\n\u30d0\u30fc\u30b8\u30e7\u30f31.3.70\u3067\u306fIntelliJ IDEA\u3068Kotlin\u306e\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3067Kotlin\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u3088\u308a\u4f7f\u3044\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u3001\u8907\u6570\u306e\u6539\u5584\u304c\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002\r\n\u307e\u305f\u3001Kotlin\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u4f5c\u6210\u3092\u3088\u304f\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u3001\u30b5\u30f3\u30d7\u30eb\u4ed8\u304d\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002 \u3053\u306e\u30b5\u30f3\u30d7\u30eb\u306b\u306f\u6a19\u6e96\u30b9\u30af\u30ea\u30d7\u30c8\uff08*.main.kts\uff09\u306e\u4f8b\u3084\u3001\u30b9\u30af\u30ea\u30d7\u30c8API\u306e\u4f7f\u7528\u4f8b\u3068\u30ab\u30b9\u30bf\u30e0\u30b9\u30af\u30ea\u30d7\u30c8\u5b9a\u7fa9\u306e\u4f8b\u304c\u53ce\u9332\u3055\u308c\u3066\u3044\u307e\u3059\u3002 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70\"\r\n\r\n\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u65b9\u6cd5\r\n\u3044\u3064\u3082\u306e\u3088\u3046\u306b\u3001play.kotl.in\u3067Kotlin\u3092\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u8a66\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\r\n\r\n\tGradle\u3068Maven\u306e\u5834\u5408\uff1a\u30b3\u30f3\u30d1\u30a4\u30e9\u3068\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b1.3.70\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 Gradle\u3068Maven\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002\r\n\tIntelliJ IDEA\u3068Android Studio\u306e\u5834\u5408\uff1aKotlin\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30d0\u30fc\u30b8\u30e7\u30f31.3.70\u306b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3057\u307e\u3059\u3002 Tools | Kotlin | Configure Kotlin Plugin Updates \u3092\u4f7f\u7528\u3057\u3066\u300cCheck again\u300d\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002\r\n\tEclipse\u306e\u5834\u5408\uff1aMarketplace\u3092\u4f7f\u7528\u3057\u3066\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002\r\n\t\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u3001Github\u30ea\u30ea\u30fc\u30b9\u30da\u30fc\u30b8\u304b\u3089\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u307e\u3059\u3002\r\n\r\n\u3053\u306e\u65b0\u30ea\u30ea\u30fc\u30b9\u3067\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001Slack\u306e\u30d5\u30a9\u30fc\u30e9\u30e0\uff08\u3053\u3061\u3089\u3067\u62db\u5f85\u3092\u53d7\u3051\u3066\u304f\u3060\u3055\u3044\uff09\u3067\u652f\u63f4\u3092\u4f9d\u983c\u3059\u308b\u304b\u3001\u8ab2\u984c\u30c8\u30e9\u30c3\u30ab\u30fc\u3067\u8ab2\u984c\u3092\u5831\u544a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\n\r\nLet's Kotlin!\r\n\u5916\u90e8\u8ca2\u732e\u8005\r\n\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u7528\u306e\u30d3\u30eb\u30c0\u30fc\u95a2\u6570\u5bfe\u5fdc\u3092\u884c\u3063\u305fFleshgrinder\u6c0f\u3068\u3001reduceOrNull()\u95a2\u6570\u3092\u8ffd\u52a0\u3057\u305fadellibovi\u6c0f\u306b\u611f\u8b1d\u3044\u305f\u3057\u307e\u3059\u3002\r\n\r\n\u307e\u305f\u3001\u3053\u306e\u30ea\u30ea\u30fc\u30b9\u306b\u542b\u307e\u308c\u3066\u3044\u305f\u30d7\u30eb\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u6240\u6709\u8005\u3067\u3042\u308b\u3059\u3079\u3066\u306e\u5916\u90e8\u8ca2\u732e\u8005\u306b\u3082\u611f\u8b1d\u3044\u305f\u3057\u307e\u3059\u3002\r\n\r\n\tpyos\r\n\tSteven Sch\u00e4fer\r\n\tToshiaki Kameyama\r\n\tMark Punzalan\r\n\tMads Ager\r\n\tKristoffer Andersen\r\n\tIvan Gavrilovic\r\n\tJiaxiang Chen\r\n\tKevin Bierhoff\r\n\tAlfredo Delli Bovi\r\n\tTillmann Berg\r\n\tVictor Turansky\r\n\tAlexander Shustanov\r\n\tLeonardo Colman Lopes\r\n\tJuan Chen\r\n\tJordan Demeulenaere\r\n\tJim Sproc\r\n\tBurak Eregar\r\n\tDmitriy Jarosh\r\n\tDat Trieu\r\n\tDmitry Borodin\r\n\tEfeturi Money\r\n\tMiguel Serra\r\n\tFleshgrinder\r\n\tJens Klingenberg\r\n\tLouis CAD\r\n\r\n[\u539f\u6587]\u00a0Original post\u00a0in English is written by\u00a0Pavel Semyonov","protected":false},"excerpt":{"rendered":"2020\u5e743\u67083\u65e5\u306b\u516c\u958b\u3055\u308c\u305fKotlin 1.3.70\u30ea\u30ea\u30fc\u30b9\u30d6\u30ed\u30b0\u30dd\u30b9\u30c8\u306e\u7ffb\u8a33\u3067\u3059\u3002\u3053\u306e\u5897\u5206\u30ea\u30ea\u30fc\u30b9\u3067\u306f\u3001\u91cd\u8981\u306a\u65b0\u6a5f\u80fd\u306f\u63d0\u4f9b\u3057\u3066\u3044\u307e\u305b\u3093\u3002 \u305f\u3060\u3057\u3001\u65e2\u5b58\u6a5f\u80fd\u306e\u6539\u5584\u3068\u554f\u984c\u4fee\u6b63\u306b\u6700\u5584\u3092\u5c3d\u304f\u3057\u3001\u3055\u3089\u306b\u306f\u5b9f\u9a13\u7684\u6a5f\u80fd\u3082\u8ffd\u52a0\u3057\u3066\u7686\u3055\u3093\u306b\u304a\u8a66\u3057\u9802\u3051\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002 Kotlin 1.3.70\u306e\u30cf\u30a4\u30e9\u30a4\u30c8\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002\t\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306eKotlin\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u65b0\u3057\u3044\u95a2\u6570\u3068\u30af\u30e9","protected":false},"author":{"name":"Elizaveta Semakova","link":"https:\/\/blog.jetbrains.com\/ja\/author\/elizavetasemakova"},"featured_media":35231,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[],"tags":[],"cross-post-tag":[],"acf":[],"featured_image":"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/04\/jp-Kotlin-1.3.70.png","_links":{"self":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/posts\/35230"}],"collection":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/users\/811"},{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/users\/811"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/comments?post=35230"}],"version-history":[{"count":0,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/posts\/35230\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/media\/35231"}],"wp:attachment":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/media?parent=35230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/categories?post=35230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/tags?post=35230"},{"taxonomy":"cross-post-tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/cross-post-tag?post=35230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}