{"id":58264,"date":"2020-07-16T09:06:18","date_gmt":"2020-07-16T09:06:18","guid":{"rendered":"https:\/\/blog.jetbrains.com\/?post_type=kotlin&#038;p=58264"},"modified":"2020-07-21T11:03:34","modified_gmt":"2020-07-21T11:03:34","slug":"kotlin-1-4-m3-is-out-standard-library-changes-ja","status":"publish","type":"kotlin","link":"https:\/\/blog.jetbrains.com\/ja\/kotlin\/2020\/07\/kotlin-1-4-m3-is-out-standard-library-changes-ja\/","title":{"rendered":"Kotlin 1.4-M3 \u516c\u958b: \u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u95a2\u3059\u308b\u5909\u66f4"},"content":{"rendered":"<p>\u5148\u65e5\u3001Kotlin 1.4 \u306e\u6700\u7d42\u30de\u30a4\u30eb\u30b9\u30c8\u30fc\u30f3\u30d7\u30ec\u30d3\u30e5\u30fc <strong>1.4-M3<\/strong> \u3092\u516c\u958b\u3057\u307e\u3057\u305f\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u3053\u306e\u30d7\u30ec\u30d3\u30e5\u30fc\u306e\u516c\u958b\u306b\u969b\u3057\u305f Kotlin \u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3078\u306e\u5909\u66f4\u3092\u8aac\u660e\u3057\u307e\u3059\u3002 M3 \u3067\u306f\u3001\u307b\u304b\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3082\u66f4\u65b0\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u3089\u306b\u3064\u3044\u3066\u306f\u3001Kotlin 1.4 \u306e\u30b9\u30b3\u30fc\u30d7\u3092\u7de0\u3081\u308b\u30ea\u30ea\u30fc\u30b9\u5019\u88dc\u30d0\u30fc\u30b8\u30e7\u30f3\uff081.4-RC\uff09\u3092\u4ee5\u3066\u3001\u8fd1\u65e5\u5225\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/blog.jetbrains.com\/kotlin\/2020\/07\/kotlin-1-4-m3-is-out-standard-library-changes#how-to-try\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-55596\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/07\/Blog_Banners_m3_1500h751.png\" alt=\"\" width=\"1501\" height=\"752\" \/><\/a><\/p>\n<p>1.4-M3 \u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u5909\u66f4\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>JVM \u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u3001<a href=\"https:\/\/blog.jetbrains.com\/kotlin\/ja\/2020\/07\/kotlin-1-4-m3-is-out-standard-library-changes-ja#module-info\"><code>module-info<\/code> \u8a18\u8ff0\u5b50<\/a>\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f<\/li>\n<li><a href=\"https:\/\/blog.jetbrains.com\/https:\/\/blog.jetbrains.com\/kotlin\/ja\/2020\/07\/kotlin-1-4-m3-is-out-standard-library-changes-ja#fun-interfaces-in-stdlib\">\u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/a>\u304c\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f<\/li>\n<li>\u5b9f\u4e16\u754c\u306e\u30b1\u30fc\u30b9\u306b\u5bfe\u5fdc\u3059\u308b<a href=\"https:\/\/blog.jetbrains.com\/kotlin\/ja\/2020\/07\/kotlin-1-4-m3-is-out-standard-library-changes-ja#collection-operations\">\u65b0\u3057\u3044\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u578b\u6f14\u7b97<\/a><\/li>\n<li>\u5171\u901a\u30e9\u30a4\u30d6\u30e9\u30ea\u306e<a href=\"https:\/\/blog.jetbrains.com\/kotlin\/ja\/2020\/07\/kotlin-1-4-m3-is-out-standard-library-changes-ja#common-throws-annotation\"><code>@Throws<\/code> \u6ce8\u91c8<\/a><\/li>\n<li>\u4e00\u90e8\u306e<a href=\"https:\/\/blog.jetbrains.com\/kotlin\/ja\/2020\/07\/kotlin-1-4-m3-is-out-standard-library-changes-ja#equality-in-floating-point-arrays\">\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u914d\u5217<\/a>\u306e\u5ec3\u6b62<\/li>\n<\/ul>\n<p>\u5b8c\u5168\u306a\u5909\u66f4\u30ea\u30b9\u30c8\u306f<a href=\"https:\/\/github.com\/JetBrains\/kotlin\/blob\/1.4-M3\/ChangeLog.md\" target=\"_blank\" rel=\"noopener\">\u5909\u66f4\u30ed\u30b0<\/a>\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002 \u3053\u308c\u307e\u3067\u540c\u69d8\u3001<a href=\"https:\/\/blog.jetbrains.com\/kotlin\/ja\/2020\/07\/kotlin-1-4-m3-is-out-standard-library-changes-ja#external-contributors\">\u793e\u5916\u8ca2\u732e\u8005\u306e\u7686\u69d8<\/a>\u304b\u3089\u306e\u3054\u5354\u529b\u306b\u6df1\u304f\u611f\u8b1d\u3044\u305f\u3057\u307e\u3059\u3002<\/p>\n<p>\u305c\u3072<a href=\"https:\/\/blog.jetbrains.com\/kotlin\/2020\/07\/kotlin-1-4-m3-is-out-standard-library-changes#how-to-try\">\u30d7\u30ec\u30d3\u30e5\u30fc\u3092\u304a\u8a66\u3057<\/a>\u306e\u4e0a\u3001<a href=\"https:\/\/blog.jetbrains.com\/kotlin\/ja\/2020\/07\/kotlin-1-4-m3-is-out-standard-library-changes-ja#share-your-feedback\">\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u304a\u9001\u308a\u304f\u3060\u3055\u3044<\/a>\u3002<\/p>\n<p><!--\u8a73\u7d30--><\/p>\n<h2 id=\"module-info\">\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u306b module-info \u8a18\u8ff0\u5b50\u3092\u8ffd\u52a0<\/h2>\n<p>Jigsaw \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u304a\u304b\u3052\u3067\u3001Java 9 \u3088\u308a\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 <a href=\"https:\/\/docs.oracle.com\/en\/java\/javase\/11\/tools\/jlink.html\" target=\"_blank\" rel=\"noopener\"><strong>jlink<\/strong> \u30c4\u30fc\u30eb<\/a>\u3092\u4f7f\u7528\u3057\u3066\u3001\u30a2\u30d7\u30ea\u306b\u5fc5\u8981\u306a\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u307f\u3092\u542b\u3080\u30ab\u30b9\u30bf\u30e0 Java \u30e9\u30f3\u30bf\u30a4\u30e0\u30a4\u30e1\u30fc\u30b8\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u524d\u304b\u3089 <code>jlink<\/code> \u3092 Kotlin \u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u3068\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3057\u305f\u304c\u3001\u3053\u308c\u306b\u306f \u201cmodular\u201d \u5206\u985e\u5b50\u3092\u6301\u3064\u500b\u5225\u306e\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u5168\u4f53\u306e\u660e\u78ba\u3055\u306b\u6b20\u3051\u3066\u3044\u307e\u3057\u305f\u3002 \u30e1\u30a4\u30f3\u306e\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u306b\u30e2\u30b8\u30e5\u30fc\u30eb\u8a18\u8ff0\u5b50\u3092\u542b\u3081\u3089\u308c\u306a\u304b\u3063\u305f\u539f\u56e0\u306f\u3001Android \u30c4\u30fc\u30eb\u306b\u304a\u3051\u308b\u8ab2\u984c\u306b\u3042\u308a\u307e\u3057\u305f\u304c\u3001\u3053\u306e\u8ab2\u984c\u306f\u4fee\u6b63\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Kotlin 1.4 \u3067\u306f\u3001<code>module-info.java<\/code> \u30e2\u30b8\u30e5\u30fc\u30eb\u60c5\u5831\u306e\u8ffd\u52a0\u306b\u3088\u308a\u3001\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u306b\u8a2d\u5b9a\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u305f\u3081\u3001<code>jlink<\/code> \u3068\u306e\u4f7f\u7528\u304c\u7c21\u5358\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002 Android \u3067\u306f\u3001Android Gradle \u30d7\u30e9\u30b0\u30a4\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3 3.2 \u4ee5\u964d\u3092\u5fc5\u305a\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002module-info \u3092\u6301\u3064 jar \u3092\u6b63\u3057\u304f\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2 id=\"fun-interfaces-in-stdlib\">\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e fun interface<\/h2>\n<p>Kotlin 1.4 \u3067\u306f\u3001<a href=\"https:\/\/blog.jetbrains.com\/ja\/2020\/01\/16\/2731\/\">Kotlin \u30af\u30e9\u30b9\u306e SAM \u5909\u63db<\/a>\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u307e\u3059\u3002 \u5358\u4e00\u306e\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u306e\u307f\u3092\u6301\u3064\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092 <code>fun interface<\/code> \u3068\u3057\u3066\u30de\u30fc\u30af\u3057\u3001\u305d\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u671f\u5f85\u3055\u308c\u308b\u5834\u5408\u306b\u5f15\u6570\u3068\u3057\u3066\u30e9\u30e0\u30c0\u5f0f\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u306f\u3001\u6b21\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c <code>fun interface<\/code> \u3068\u3057\u3066\u5ba3\u8a00\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li><code>Comparator<\/code><\/li>\n<li><code>ReadOnlyProperty<\/code><\/li>\n<li><code>PropertyDelegateProvider<\/code>\uff08<a href=\"https:\/\/blog.jetbrains.com\/kotlin\/2020\/05\/1-4-m2-standard-library\/#property-delegation-improvements\">1.4-M2<\/a> \u3067\u5c0e\u5165\uff09<\/li>\n<\/ul>\n<p>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u4f5c\u6210\u306b\u306f\u3001\u30e9\u30e0\u30c0\u5f0f\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u53d6\u308b SAM-constructor \u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002 \u30b3\u30fc\u30c9\u304c\u5927\u5e45\u306b\u5358\u7d14\u5316\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/07\/fun_interface-1.png\" data-gif-src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/07\/fun_interface.gif\"><\/p>\n<h2 id=\"collection-operations\">\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u578b\u6f14\u7b97<\/h2>\n<ul>\n<li>\u65b0\u3057\u3044 <code>sumOf<\/code> \u95a2\u6570\u306f\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u3059\u3079\u3066\u306e\u8981\u7d20\u306b\u304a\u3044\u3066\u30bb\u30ec\u30af\u30bf\u30fc\u95a2\u6570\u3092\u53d6\u308a\u3001\u305d\u306e\u5024\u306e\u5408\u8a08\u3092\u8fd4\u3057\u307e\u3059\u3002 \u65e2\u5b58\u306e <code>sumBy<\/code> \u3068 <code>sumByDouble<\/code> \u95a2\u6570\u306b\u975e\u5e38\u306b\u3088\u304f\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001 \u4e3b\u306a\u9055\u3044\u306f\u3001\u65b0\u3057\u3044 <code>sumOf<\/code> \u95a2\u6570\u306f\u3001\u623b\u308a\u5024\u306e\u578b\u304c\u591a\u69d8\u306a\u30bb\u30ec\u30af\u30bf\u30fc\u3092\u53d6\u308b\u305f\u3081\u3001\u7570\u306a\u308b\u578b\u306e\u5408\u8a08\u3092\u540c\u3058\u3088\u3046\u306b\u51e6\u7406\u3067\u304d\u308b\u3068\u3044\u3046\u70b9\u306b\u3042\u308a\u307e\u3059\u3002 sumOf \u3067\u306f\u3001<code>Int<\/code>\u3001<code>Long<\/code>\u3001<code>Double<\/code>\u3001<code>UInt<\/code>\u3001<code>ULong<\/code> \u306e\u578b\u306e\u5408\u8a08\u3092\u751f\u6210\u3067\u304d\u307e\u3059\u3002 JVM \u3067\u306f\u3001<code>BigInteger<\/code> \u3068 <code>BigDecimal<\/code> \u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\n<pre class=\"kotlin-code\" data-version=\"1.4-M3\" theme=\"idea\" indent=\"4\" style=\"visibility: hidden; padding: 36px 0;\">\r\ndata class OrderItem(val name: String, val price: Double, val count: Int)fun main() {\r\n\/\/sampleStart\r\nval order = listOf(\r\nOrderItem(&quot;Cake&quot;, price = 10.0, count = 1),\r\nOrderItem(&quot;Coffee&quot;, price = 2.5, count = 3),\r\nOrderItem(&quot;Tea&quot;, price = 1.5, count = 2))val total = order.sumOf { it.price * it.count} \/\/ Double\r\nval count = order.sumOf { it.count } \/\/ Int\r\n\/\/sampleEnd\r\nprintln(&quot;You&#039;ve ordered $count items that cost $total in total&quot;)\r\n}\r\n<\/pre>\n<\/li>\n<li><code>min<\/code> \u95a2\u6570\u3068 <code>max<\/code> \u95a2\u6570\u306e\u540d\u524d\u306f\u3001\u305d\u308c\u305e\u308c <code>minOrNull<\/code> \u3068 <code>maxOrNull<\/code> \u306b\u5909\u66f4\u3055\u308c\u307e\u3057\u305f\u3002 1.0 \u3067\u5c0e\u5165\u3055\u308c\u3066\u4ee5\u6765\u3001<code>min<\/code> \u3068 <code>max<\/code> \u306f\u7a7a\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u5bfe\u3057 <code>null<\/code> \u3092\u8fd4\u3057\u3066\u304d\u307e\u3057\u305f\u3002 \u3053\u308c\u306f\u3001Kotlin \u306e Collections API \u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u547d\u540d\u898f\u5247\u3068\u7570\u306a\u308a\u307e\u3059\u3002<code>*OrNull<\/code> \u30b5\u30d5\u30a3\u30c3\u30af\u30b9\u306e\u306a\u3044\u95a2\u6570\u306f\u3001\u30ec\u30b7\u30fc\u30d0\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u7a7a\u3067\u3042\u308b\u5834\u5408\u306b\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002 \u4ee3\u308f\u308a\u306b <code>null<\/code> \u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u3001<code>firstOrNull<\/code> \u306e\u3088\u3046\u306b\u3001\u3053\u306e\u95a2\u6570\u306e <code>*OrNull<\/code> \u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u305d\u3053\u3067\u3001<code>min<\/code> \u3068 <code>max<\/code> \u306e\u52d5\u4f5c\u3092\u5f90\u3005\u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002 1.4-M3 \u3067\u306f\u3001 <code>min<\/code> \u3068 <code>max<\/code> \u306e\u985e\u7fa9\u8a9e\u3068\u3057\u3066 <code>minOrNull<\/code> \u3068 <code>maxOrNull<\/code> \u3092\u8ffd\u52a0\u3057\u3001 null \u3067\u306f\u306a\u3044\u578b\u306e\u5024\u3092\u623b\u3059 <code>min<\/code> \u3068 <code>max<\/code> \u3068\u3057\u3066\u5c0e\u5165\u3057\u306a\u304a\u3059\u3053\u3068\u3092\u524d\u63d0\u306b\u5ec3\u6b62\u30b5\u30a4\u30af\u30eb\u3092\u958b\u59cb\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n<li>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u9805\u76ee\u306b\u5bfe\u3059\u308b\u3042\u308b\u30bb\u30ec\u30af\u30bf\u30fc\u95a2\u6570\u306e\u6700\u5c0f\u5024\u307e\u305f\u306f\u6700\u5927\u5024\u3092\u8fd4\u3059 <code>minOf<\/code> \u95a2\u6570\u3068 <code>maxOf<\/code> \u95a2\u6570\u3092\u5c0e\u5165\u3057\u307e\u3057\u305f\u3002 \u3053\u308c\u3089\u306e\u95a2\u6570\u306f\u3001<code>map { selector }.max()!!<\/code> \u307e\u305f\u306f<code>maxBy { selector }!!.selector<\/code>\uff08\u307e\u305f\u306f <code>min<\/code> \u3068 <code>minBy<\/code>\uff09\u3092\u8a18\u8ff0\u3059\u308b\u306e\u306b\u5fc5\u8981\u3060\u3063\u305f\u30b1\u30fc\u30b9\u3092\u30ab\u30d0\u30fc\u3057\u307e\u3059\u3002\n<pre class=\"kotlin-code\" data-version=\"1.4-M3\" theme=\"idea\" indent=\"4\" style=\"visibility: hidden; padding: 36px 0;\">\r\ndata class OrderItem(val name: String, val price: Double, val count: Int)fun main() {\r\n\/\/sampleStart\r\nval order = listOf(\r\nOrderItem(&quot;Cake&quot;, price = 10.0, count = 1),\r\nOrderItem(&quot;Coffee&quot;, price = 2.5, count = 3),\r\nOrderItem(&quot;Tea&quot;, price = 1.5, count = 2))val highestPrice = order.maxOf { it.price }\r\n\/\/sampleEnd\r\nprintln(&quot;The most expensive item in the order costs $highestPrice&quot;)\r\n}\r\n<\/pre>\n<p>\u65e2\u5b58\u306e API \u3068\u306e\u4e00\u8cab\u6027\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u3001<code>minOfWith<\/code> \u3068 <code>maxOfWith<\/code> \u3082\u8ffd\u52a0\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306f\u3001<code>Comparator<\/code> \u3092\u5f15\u6570\u3068\u3057\u3066\u53d6\u308a\u307e\u3059\u3002<br \/>\n4 \u3064\u3059\u3079\u3066\u306e\u65b0\u3057\u3044\u95a2\u6570\u306f\u3001\u4e0a\u8a18\u3067\u8aac\u660e\u3057\u305f null \u4ee5\u5916\u306e\u65b9\u6cd5\u306b\u5f93\u3044\u3001\u7a7a\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3067\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u3053\u306e\u5834\u5408\u306b <code>null<\/code> \u3092\u8fd4\u3059 <code>*orNull<\/code> \u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><code>flatMap<\/code> \u3068 <code>flatMapTo<\/code> \u306e\u65b0\u3057\u3044\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3067\u306f\u3001\u30ec\u30b7\u30fc\u30d0\u306e\u578b\u3068\u4e00\u81f4\u3057\u306a\u3044\u623b\u308a\u5024\u306e\u578b\u3067\u5909\u63db\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\n<ul>\n<li><code>Iterable<\/code>\u3001<code>Array<\/code>\u3001\u304a\u3088\u3073 <code>Map<\/code> \u3067 <code>Sequence<\/code> \u306b\u5909\u63db<\/li>\n<li><code>Sequence<\/code> \u3067 <code>Iterable<\/code> \u306b\u5909\u63db<\/li>\n<\/ul>\n<pre class=\"kotlin-code\" data-version=\"1.4-M3\" theme=\"idea\" indent=\"4\" style=\"visibility: hidden; padding: 36px 0;\">\r\nfun main() {\r\n\/\/sampleStart\r\nval list = listOf(&quot;kot&quot;, &quot;lin&quot;)\r\nval lettersList = list.flatMap { it.asSequence() }\r\nval lettersSeq = list.asSequence().flatMap { it.toList() }\r\n\/\/sampleEnd\r\nprintln(lettersList)\r\nprintln(lettersSeq.toList())\r\n}\r\n<\/pre>\n<\/li>\n<li>\u65b0\u3057\u3044 <code>flatMapIndexed<\/code> \u95a2\u6570\u306f\u3001<code>flatMap<\/code> \u306b\u5bfe\u5fdc\u3059\u308b\u95a2\u6570\u3068\u3057\u3066\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002 \u3059\u3067\u306b\u3054\u5b58\u77e5\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u51e6\u7406\u3059\u308b\u95a2\u6570\u306e\u76ee\u7684\u3067 <code>Indexed<\/code> \u3059\u308b\u3068\u3001\u9069\u7528\u3055\u308c\u308b\u6f14\u7b97\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3068\u3057\u3066\u8981\u7d20\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u542b\u307e\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\n<pre class=\"kotlin-code\" data-version=\"1.4-M3\" theme=\"idea\" indent=\"4\" style=\"visibility: hidden; padding: 36px 0;\">\r\nfun main() {\r\n\/\/sampleStart\r\nval list = listOf(&quot;hello&quot;, &quot;kot&quot;, &quot;lin&quot;, &quot;world&quot;)\r\nval kotlin = list.flatMapIndexed { index, item -&gt;\r\nif (index in 1..2) item.toList() else emptyList()\r\n}\r\n\/\/sampleEnd\r\nprintln(kotlin)\r\n}\r\n<\/pre>\n<\/li>\n<\/ul>\n<h2 id=\"common-throws-annotation\">\u5171\u901a\u306e @Throws \u6ce8\u91c8<\/h2>\n<p>Kotlin \u306f<a href=\"https:\/\/kotlinlang.org\/docs\/reference\/exceptions.html#checked-exceptions\" target=\"_blank\" rel=\"noopener\">\u4f8b\u5916\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u305b\u3093<\/a>\u304c\u3001Java \u3084 Swift \u3068\u3044\u3063\u305f\u4f8b\u5916\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046\u8a00\u8a9e\u3068\u306e\u4e92\u63db\u6027\u3092\u5f97\u308b\u305f\u3081\u306b\u3001<a href=\"https:\/\/kotlinlang.org\/api\/latest\/jvm\/stdlib\/kotlin.jvm\/-throws\/\" target=\"_blank\" rel=\"noopener\"><code> @Throws<\/code> \u6ce8\u91c8<\/a>\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 \u4ee5\u524d\u306f\u3001JVM \u7528\uff08<code>kotlin.jvm.Throws<\/code>\uff09\u3068 Native \u7528\uff08<code>kotlin.native.Throws<\/code>\uff09\u306e\u305d\u308c\u305e\u308c\u306b\u5bfe\u3057\u3001\u3053\u306e\u540d\u524d\u306e\u6ce8\u91c8\u3092\u5225\u3005\u306b\u4f7f\u7528\u3057\u3066\u3044\u307e\u3057\u305f\u3002 1.4-M3 \u304b\u3089\u306f\u3001<code> @Throws<\/code> \u6ce8\u91c8\u306f\u3001\u5171\u901a\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4e00\u90e8\u3068\u3057\u3066\u3001<code>kotlin<\/code> \u30d1\u30c3\u30b1\u30fc\u30b8\uff08<code>kotlin.Throws<\/code>\uff09\u3067\u76f4\u63a5\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3 id=\"throws-in suspending-functions-in-swift-and-objective-c\">Swift \u304a\u3088\u3073 Objective-C \u306e\u30b5\u30b9\u30da\u30f3\u30c9\u95a2\u6570\u306e @Throws<\/h3>\n<p>1.4-M1 \u3067\u306f\u3001<a href=\"https:\/\/blog.jetbrains.com\/ja\/2020\/04\/23\/3001\/\">Objective-C\/Swift \u76f8\u4e92\u904b\u7528\u6a5f\u80fd\u306b\u304a\u3051\u308b\u4f8b\u5916\u51e6\u7406\u306b\u95a2\u3059\u308b\u5909\u66f4<\/a>\u3092\u767a\u8868\u3057\u3001\u4f8b\u5916\u304c\u3001<code> @Throws<\/code> \u6ce8\u91c8\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u6307\u5b9a\u3055\u308c\u308b\u30af\u30e9\u30b9\uff08\u307e\u305f\u306f\u305d\u306e\u30b5\u30d6\u30af\u30e9\u30b9\uff09\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3042\u308b\u5834\u5408\u306b\u306e\u307f <code>NSError<\/code> \u304c\u30b9\u30ed\u30fc\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u307e\u305f 1.4-M2 \u3067\u306f\u3001<a href=\"https:\/\/blog.jetbrains.com\/ja\/2020\/06\/12\/kotlin-1-4-m2-released\/\">Swift \u3068 Objective-C \u306b\u304a\u3051\u308b Kotlin \u306e\u30b5\u30b9\u30da\u30f3\u30c9\u95a2\u6570\u306e\u57fa\u672c\u30b5\u30dd\u30fc\u30c8<\/a>\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002 \u305d\u3057\u3066 1.4-M3 \u3067\u306f\u3001<code> @Throws<\/code> \u3067\u6ce8\u91c8\u4ed8\u3051\u3055\u308c\u305f\u30b5\u30b9\u30da\u30f3\u30c9\u95a2\u6570\u306e\u632f\u308b\u821e\u3044\u306b\u5c0f\u3055\u306a\u5909\u66f4\u304c\u52a0\u3048\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><code> @Throws<\/code> \u3067\u6ce8\u91c8\u4ed8\u3051\u3055\u308c\u305f <code>suspend fun<\/code> \u304c\u3042\u308b\u5834\u5408\u3001\u305d\u306e <code> @Throws<\/code> \u6ce8\u91c8\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066 <code>CancellationException::class<\/code> \u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/li>\n<li><code>suspend fun<\/code> \u306b <code> @Throws<\/code> \u6ce8\u91c8\u304c\u306a\u3044\u5834\u5408\u3001Swift \u304b\u3089\u305d\u308c\u3092\u547c\u3073\u51fa\u3059\u3068\u3001\u660e\u793a\u7684\u306b <code> @Throws(CancellationException::class)<\/code> \u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2 id=\"equality-in-floating-point-arrays\">\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u914d\u5217\u306e\u7b49\u5024\u6027<\/h2>\n<p>\u30b3\u30f3\u30c6\u30ca\u578b\u306b\u4f7f\u7528\u3067\u304d\u308b\u624b\u3054\u308d\u306a\u62e1\u5f35\u95a2\u6570 <code>contains<\/code>\u3001<code>indexOf<\/code>\u3001\u304a\u3088\u3073<code>lastIndexOf<\/code> \u3092\u77e5\u3063\u3066\u3044\u308b\u65b9\u306f\u305f\u304f\u3055\u3093\u3044\u308b\u3068\u601d\u3044\u307e\u3059\u3002 \u3057\u3070\u3089\u304f\u524d\u306e\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u914d\u5217\uff08<code>FloatArray<\/code> \u304a\u3088\u3073 <code>DoubleArray<\/code>\uff09\u306b\u304a\u3051\u308b\u3053\u308c\u3089\u306e\u95a2\u6570\u306e\u632f\u308b\u821e\u3044\u306f\u8cdb\u5426\u4e21\u8ad6\u3067\u3042\u308a\u3001\u8aa4\u3063\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u304b\u306d\u306a\u3044\u3068\u5224\u5b9a\u3057\u307e\u3057\u305f\u3002<br \/>\n\u3082\u3046\u5c11\u3057\u5177\u4f53\u7684\u306b\u8a00\u3046\u3068\u3001\u3053\u308c\u3089\u306e\u95a2\u6570\u306f\u3001\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u8a08\u7b97\u3067\u4e00\u822c\u7684\u306a <a href=\"https:\/\/en.wikipedia.org\/wiki\/IEEE_754\" target=\"_blank\" rel=\"noopener\">IEEE 754<\/a> \u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002 \u3053\u306e\u6a19\u6e96\u306f\u3001\u30b3\u30fc\u30ca\u30fc\u30b1\u30fc\u30b9\u306b\u304a\u3051\u308b\u7b49\u5024\u6027\u306b\u95a2\u3057\u3001\u6b21\u306e\u898f\u5247\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><code>NaN<\/code> <strong> \u306f <\/strong> <code>NaN<\/code> \u3068\u540c\u7b49\u3067\u306f\u306a\u3044<\/li>\n<li><code>-0.0<\/code> <strong>\u306f <\/strong> <code>0.0<\/code> \u3068\u540c\u7b49\u3067\u3042\u308b<\/li>\n<\/ul>\n<p>\u3053\u3046\u3044\u3063\u305f\u898f\u5247\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u4e88\u6e2c\u3067\u304d\u306a\u3044\u7d50\u679c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"kotlin-code\" data-version=\"1.4-M3\" theme=\"idea\" indent=\"4\" style=\"visibility: hidden; padding: 36px 0;\">\r\nfun main() {\r\n\/\/sampleStart\r\nval darray = doubleArrayOf(Double.NaN, 0.0)\r\nprintln (darray.contains(darray[0])) \/\/ false!\r\n\/\/sampleEnd\r\n}\r\n<\/pre>\n<p>\u307e\u305f\u3001<em>total order<\/em> \u7b49\u5024\u6027\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u540c\u4e00\u306e\u95a2\u6570\u304c\u30ea\u30b9\u30c8\u306b\u304a\u3044\u3066\u52d5\u4f5c\u3059\u308b\u632f\u308b\u821e\u3044\u3082\u4e00\u5b9a\u3057\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"kotlin-code\" data-version=\"1.4-M3\" theme=\"idea\" indent=\"4\" style=\"visibility: hidden; padding: 36px 0;\">\r\nfun main() {\r\n\/\/sampleStart\r\nval listOfDouble: List = listOf(0.0, Double.NaN)\r\nval listFromArray: List = doubleArrayOf(0.0, Double.NaN).asList()\r\n\r\nprintln(listOfDouble.contains(Double.NaN)) \/\/ true\r\nprintln(listFromArray.contains(Double.NaN)) \/\/ \u4ee5\u524d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f false\r\n\/\/sampleEnd\r\n}\r\n<\/pre>\n<p>1.4-M3 \u3067\u306f\u3001<code>FloatArray<\/code> \u3068 <code>DoubleArray<\/code> \u306e <code>contains<\/code>\u3001<code>indexOf<\/code>\u3001\u304a\u3088\u3073 <code>lastIndexOf<\/code> \u62e1\u5f35\u95a2\u6570\u306e\u4f7f\u7528\u5ec3\u6b62\u30b5\u30a4\u30af\u30eb\u304c\u59cb\u307e\u308a\u307e\u3059\u3002 \u3053\u308c\u3089\u3092\u4f7f\u7528\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u95a2\u6570\u306e\u4f7f\u7528\u7b87\u6240\u3092\u7f6e\u304d\u63db\u3048\u308b\u6307\u793a\u3092\u51fa\u3059\u8b66\u544a\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<br \/>\n\u4eca\u5f8c\u306e\u30ea\u30ea\u30fc\u30b9\u306b\u304a\u3044\u3066\u306f\u3001\u4f7f\u7528\u5ec3\u6b62\u30ec\u30d9\u30eb\u3092 <code>ERROR<\/code> \u306b\u3057\u3001\u30d1\u30d6\u30ea\u30c3\u30af API \u304b\u3089\u9664\u53bb\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/p>\n<h2 id=\"converting-from-ktype-to-java-type\">KType \u304b\u3089 Java Type \u3078\u306e\u5909\u63db<\/h2>\n<p>Kolin 1.3.40 \u3067\u306f\u3001\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b<a href=\"https:\/\/blog.jetbrains.com\/kotlin\/2019\/06\/kotlin-1-3-40-released\/#type-of\">\u4fbf\u5229\u306a <code>typeOf<\/code> \u95a2\u6570\u3092\u8ffd\u52a0<\/a>\u3057\u307e\u3057\u305f\u3002 \u3053\u306e\u95a2\u6570\u306f\u3001\u5177\u4f53\u5316\u3055\u308c\u305f\u578b <code>T<\/code>\u306e\u5b9f\u884c\u6642\u306e\u8868\u73fe\u3092 <a href=\"https:\/\/kotlinlang.org\/api\/latest\/jvm\/stdlib\/kotlin.reflect\/-k-type\/\" target=\"_blank\" rel=\"noopener\"><code>KType<\/code><\/a> \u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u3057\u3066\u8fd4\u3057\u307e\u3059\u3002 \u3057\u304b\u3057\u3001\u591a\u304f\u306e\u5b9f\u7528\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u306f\u3001<code>KType<\/code> \u3067\u306f\u306a\u304f\u3001Java reflection <a href=\"https:\/\/docs.oracle.com\/javase\/8\/docs\/api\/java\/lang\/reflect\/Type.html\" target=\"_blank\" rel=\"noopener\"><code>java.lang.reflect.Type<\/code><\/a> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u5fc5\u8981\u306a\u5909\u63db\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u306f\u3059\u3067\u306b\u53ef\u80fd\u3067\u3057\u305f\u304c\u3001\u3053\u308c\u306b\u306f\u3001\u5b8c\u5168\u306a <code>kotlin-reflect<\/code> \u4f9d\u5b58\u95a2\u4fc2\u304c\u5fc5\u8981\u3067\u3057\u305f\u3002 \u305d\u3053\u3067\u3001<code>KType<\/code> \u304b\u3089 Java <code>Type<\/code> \u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u3068\u3057\u3066\u3001Java <code>Type<\/code> \u3092\u8fd4\u3059 <code>KType.javaType<\/code> \u62e1\u5f35\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u8ffd\u52a0\u3057\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"kotlin-code\" data-version=\"1.4-M3\" theme=\"idea\" indent=\"4\" style=\"visibility: hidden; padding: 36px 0;\">\r\nimport kotlin.reflect.javaType\r\nimport kotlin.reflect.typeOf\r\n\r\n@OptIn(ExperimentalStdlibApi::class)\r\ninline fun accessReifiedTypeArg() {\r\nval kType = typeOf()\r\nprintln(&quot;Kotlin type: $kType&quot;)\r\nprintln(&quot;Java type: ${kType.javaType}&quot;)\r\n}\r\n\r\n@OptIn(ExperimentalStdlibApi::class)\r\nfun main() {\r\naccessReifiedTypeArg()\r\n\/\/ Kotlin type: kotlin.String\r\n\/\/ Java type: class java.lang.String\r\n\r\naccessReifiedTypeArg&lt;List&gt;()\r\n\/\/ Kotlin type: kotlin.collections.List\r\n\/\/ Java type: java.util.List\r\n}\r\n<\/pre>\n<p>\u73fe\u5728\u306e\u3068\u3053\u308d\u3001\u53d6\u5f97\u3057\u305f Java <code>Type<\/code> \u306f\u4e00\u90e8\u306e\u30b3\u30fc\u30ca\u30fc\u30b1\u30fc\u30b9\uff08\u6ce8\u91c8\u4ed8\u304d\u306e\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u3084 declaration-site \u306e\u5206\u6563\u306a\u3069\uff09\u3067\u306f\u6b63\u3057\u304f\u52d5\u4f5c\u3057\u306a\u3044\u305f\u3081\u3001<code>KType.javaType<\/code> \u306f\u5b9f\u9a13\u7684\u6a5f\u80fd\u30b9\u30c6\u30fc\u30bf\u30b9\u306e\u307e\u307e\u3068\u306a\u308a\u307e\u3059\u3002 \u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u30b1\u30fc\u30b9\u306b\u95a2\u3059\u308b\u8a73\u7d30\u306f\u3001\u3053\u3061\u3089\u306e<a href=\"https:\/\/youtrack.jetbrains.com\/issue\/KT-32241#focus=streamItem-27-4200156.0-0\" target=\"_blank\" rel=\"noopener\">\u8ab2\u984c<\/a>\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>\u4e92\u63db\u6027<\/h2>\n<p>\u4e00\u90e8\u306e\u30b3\u30fc\u30ca\u30fc\u30b1\u30fc\u30b9\u306b\u304a\u3044\u3066\u3001Kotlin 1.4\u306b\u306f1.3\u3068\u306e\u4e0b\u4f4d\u4e92\u63db\u6027\u306f\u3042\u308a\u307e\u305b\u3093\u3002 Kotlin\u8a00\u8a9e\u59d4\u54e1\u4f1a\u306f\u305d\u3046\u3044\u3063\u305f\u30b1\u30fc\u30b9\u3092\u6ce8\u610f\u6df1\u304f\u30ec\u30d3\u30e5\u30fc\u3057\u3001\u300c\u4e92\u63db\u6027\u30ac\u30a4\u30c9\u300d\uff08<a href=\"https:\/\/kotlinlang.org\/docs\/reference\/compatibility-guide-13.html\" target=\"_blank\" rel=\"noopener\">\u3053\u308c<\/a>\u306b\u4f3c\u305f\u69d8\u5f0f\uff09\u3068\u3057\u3066\u63b2\u8f09\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002 \u73fe\u6642\u70b9\u3067\u306f\u3001<a href=\"https:\/\/youtrack.jetbrains.com\/issues\/KT?q=Tag:%20language-committee-approved%20Target%20versions:%201.4-M3,%201.4-M2,%201.4-M1,%201.4.0\" target=\"_blank\" rel=\"noopener\">YouTrack<\/a> \u3067\u3053\u306e\u30ea\u30b9\u30c8\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u30d7\u30ec\u30ea\u30ea\u30fc\u30b9\u30ce\u30fc\u30c8<\/h3>\n<blockquote><p>\u4e0b\u4f4d\u4e92\u63db\u6027\u4fdd\u8a3c\u306f\u3001\u30d7\u30ec\u30ea\u30ea\u30fc\u30b9\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u306f\u9069\u7528\u3055\u308c\u307e\u305b\u3093\u3002 \u6a5f\u80fd\u3084 API \u306f\u3001\u5f8c\u7d9a\u306e\u30ea\u30ea\u30fc\u30b9\u3067\u5909\u66f4\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002 \u6700\u7d42RC\u306b\u9054\u3059\u308b\u3068\u3001\u30d7\u30ec\u30ea\u30ea\u30fc\u30b9\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u751f\u6210\u3057\u305f\u3059\u3079\u3066\u306e\u30d0\u30a4\u30ca\u30ea\u306f\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u3088\u3063\u3066\u4f7f\u7528\u7981\u6b62\u3068\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u30011.4-Mx\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u305f\u3059\u3079\u3066\u306e\u3082\u306e\u3092\u518d\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p><\/blockquote>\n<h2 id=\"how-to-try\">\u65b0\u6a5f\u80fd\u3092\u8a66\u3059\u306b\u306f<\/h2>\n<p>\u3044\u3064\u3082\u306e\u3088\u3046\u306b\u3001<a href=\"http:\/\/play.kotl.in\/\" target=\"_blank\" rel=\"noopener\">play.kotl.in<\/a>\u3067<strong>Kotlin\u3092\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u8a66\u3059<\/strong>\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><strong>IntelliJ IDEA<\/strong> \u3068 <strong>Android Studio<\/strong> \u5185\u3067\u3001Kotlin \u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30d0\u30fc\u30b8\u30e7\u30f31.4-M3 \u306b\u66f4\u65b0\u3067\u304d\u307e\u3059\u3002 <a href=\"https:\/\/kotlinlang.org\/eap\/install-eap-plugin.html\" target=\"_blank\" rel=\"noopener\">\u305d\u306e\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u3053\u308c\u3092\u53c2\u7167<\/a>\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u30d7\u30ec\u30ea\u30ea\u30fc\u30b9\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u524d\u306b\u4f5c\u6210\u3055\u308c\u305f\u65e2\u5b58\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001Gradle\u307e\u305f\u306fMaven\u3067<a href=\"https:\/\/kotlinlang.org\/eap\/configure-build-for-eap.html\" target=\"_blank\" rel=\"noopener\">\u30d7\u30ec\u30d3\u30e5\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u7528\u306b\u30d3\u30eb\u30c9\u3092\u69cb\u6210<\/a>\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><strong>\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30b3\u30f3\u30d1\u30a4\u30e9<\/strong>\u306f\u3001<a href=\"https:\/\/github.com\/JetBrains\/kotlin\/releases\/tag\/v1.4-M3\" target=\"_blank\" rel=\"noopener\">GitHub\u30ea\u30ea\u30fc\u30b9\u30da\u30fc\u30b8<\/a>\u304b\u3089\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30ea\u30ea\u30fc\u30b9\u3068\u3068\u3082\u306b\u516c\u958b\u3055\u308c\u305f\u6b21\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306e<strong>\u30e9\u30a4\u30d6\u30e9\u30ea<\/strong>\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/github.com\/Kotlin\/kotlinx.atomicfu\" target=\"_blank\" rel=\"noopener\">kotlinx.atomicfu<\/a> \u30d0\u30fc\u30b8\u30e7\u30f3: <a href=\"https:\/\/bintray.com\/kotlin\/kotlinx\/kotlinx.atomicfu\/0.14.3-1.4-M3\" target=\"_blank\" rel=\"noopener\">0.14.3-1.4-M3<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/Kotlin\/kotlinx.coroutines\" target=\"_blank\" rel=\"noopener\">kotlinx.coroutines<\/a> \u30d0\u30fc\u30b8\u30e7\u30f3: <a href=\"https:\/\/bintray.com\/kotlin\/kotlinx\/kotlinx.coroutines\/1.3.7-1.4-M3\" target=\"_blank\" rel=\"noopener\">1.3.7-1.4-M3<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/Kotlin\/kotlinx.serialization\" target=\"_blank\" rel=\"noopener\">kotlinx.serialization<\/a> \u30d0\u30fc\u30b8\u30e7\u30f3: <a href=\"https:\/\/bintray.com\/kotlin\/kotlinx\/kotlinx.serialization.runtime\/0.20.0-1.4-M3\" target=\"_blank\" rel=\"noopener\">0.20.0-1.4-M3<\/a><\/li>\n<li><a href=\"https:\/\/ktor.io\/\" target=\"_blank\" rel=\"noopener\">ktor<\/a> \u30d0\u30fc\u30b8\u30e7\u30f3: <a href=\"https:\/\/bintray.com\/kotlin\/ktor\/ktor\/1.3.2-1.4-M3\" target=\"_blank\" rel=\"noopener\">1.3.2-1.4-M3<\/a><\/li>\n<\/ul>\n<p>\u30ea\u30ea\u30fc\u30b9\u306e\u8a73\u7d30\u3068\u4e92\u63db\u6027\u306e\u3042\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4e00\u89a7\u306f\u3001<a href=\"https:\/\/kotlinlang.org\/eap\/#build-details\" target=\"_blank\" rel=\"noopener\">\u3053\u3053<\/a>\u304b\u3089\u5165\u624b\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2 id=\"share-your-feedback\">\u3054\u610f\u898b\u3092\u304a\u5bc4\u305b\u304f\u3060\u3055\u3044<\/h2>\n<p><a href=\"https:\/\/youtrack.jetbrains.com\/issues\/KT\" target=\"_blank\" rel=\"noopener\">\u8ab2\u984c\u30c8\u30e9\u30c3\u30ab\u30fc<\/a>\u306b\u305f\u304f\u3055\u3093\u306e\u30d0\u30b0\u30ec\u30dd\u30fc\u30c8\u3092\u304a\u5bc4\u305b\u3044\u305f\u3060\u304d\u3001\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\u3002\u6700\u7d42\u30ea\u30ea\u30fc\u30b9\u307e\u3067\u306b\u3001\u6700\u3082\u91cd\u8981\u306a\u8ab2\u984c\u3059\u3079\u3066\u3092\u4fee\u6b63\u3067\u304d\u308b\u3088\u3046\u306b\u52aa\u3081\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u305c\u3072 <a href=\"https:\/\/app.slack.com\/client\/T09229ZC6\/C0KLZSCHF\" target=\"_blank\" rel=\"noopener\">Kotlin Slack<\/a> \u306e <em><a href=\"https:\/\/app.slack.com\/client\/T09229ZC6\/C0KLZSCHF\" target=\"_blank\" rel=\"noopener\">#eap \u30c1\u30e3\u30f3\u30cd\u30eb<\/a><\/em> \u306b\u3054\u53c2\u52a0\u304f\u3060\u3055\u3044\uff08\u62db\u5f85\u72b6\u306f<a href=\"http:\/\/slack.kotlinlang.org\/\" target=\"_blank\" rel=\"noopener\">\u3053\u3061\u3089<\/a>\u304b\u3089\u5165\u624b\u3067\u304d\u307e\u3059\uff09\u3002 \u3053\u306e\u30c1\u30e3\u30f3\u30cd\u30eb\u3067\u306f\u3001\u8cea\u554f\u3001\u30c7\u30a3\u30b9\u30ab\u30c3\u30b7\u30e7\u30f3\u3078\u306e\u53c2\u52a0\u3001\u65b0\u3057\u3044\u30d7\u30ec\u30d3\u30e5\u30fc\u30d3\u30eb\u30c9\u306b\u3064\u3044\u3066\u77e5\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>Kotlin\u3092\u4f7f\u3063\u3066\u307f\u3088\u3046!<\/p>\n<h2 id=\"external-contributors\">\u3054\u5354\u529b\u3044\u305f\u3060\u3044\u305f\u5916\u90e8\u8ca2\u732e\u8005<\/h2>\n<p>\u3053\u306e\u30ea\u30ea\u30fc\u30b9\u306b\u542b\u3081\u3089\u308c\u305f Pull \u30ea\u30af\u30a8\u30b9\u30c8\u306f\u3001\u6b21\u306e\u5916\u90e8\u8ca2\u732e\u8005\u304b\u3089\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002\u3054\u5354\u529b\u3044\u305f\u3060\u304d\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/github.com\/t-kameyama\" target=\"_blank\" rel=\"noopener\">Toshiaki Kameyama<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/sfs\" target=\"_blank\" rel=\"noopener\">Steven Sch\u00e4fer<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/jsjeon\" target=\"_blank\" rel=\"noopener\">Jinseong Jeon<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/pyos\" target=\"_blank\" rel=\"noopener\">pyos<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/punzki\" target=\"_blank\" rel=\"noopener\">Mark Punzalan<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/rapturemain\" target=\"_blank\" rel=\"noopener\">rapturemain<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/tihonovcore\" target=\"_blank\" rel=\"noopener\">Vitaly Tihonov<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/madsager\" target=\"_blank\" rel=\"noopener\">Mads Ager<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/subroh0508\" target=\"_blank\" rel=\"noopener\">Subroh Nishikori<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/juan-chen\" target=\"_blank\" rel=\"noopener\">Juan Chen<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/gcx11\" target=\"_blank\" rel=\"noopener\">gcx11<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/rbares\" target=\"_blank\" rel=\"noopener\">Robert Bares<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/tunedal\" target=\"_blank\" rel=\"noopener\">Henrik Tunedal<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/lunakoly\" target=\"_blank\" rel=\"noopener\">Nick<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/Dmitry-Borodin\" target=\"_blank\" rel=\"noopener\">Dmitry Borodin<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/efemoney\" target=\"_blank\" rel=\"noopener\">Efeturi Money<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/kevinmost\" target=\"_blank\" rel=\"noopener\">Kevin Most<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/anstkras\" target=\"_blank\" rel=\"noopener\">Anastasiya Krasnoryadtseva<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/kandersen\" target=\"_blank\" rel=\"noopener\">Kristoffer Andersen<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/mpetrov\" target=\"_blank\" rel=\"noopener\">Martin Petrov<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/gharrma\" target=\"_blank\" rel=\"noopener\">Matthew Gharrity<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/mikesamuel\" target=\"_blank\" rel=\"noopener\">Mike Samuel<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/McCreeMainer\" target=\"_blank\" rel=\"noopener\">Mikhail Likholetov<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/segunfamisa\" target=\"_blank\" rel=\"noopener\">Segun Famisa<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/kozaxinan\" target=\"_blank\" rel=\"noopener\">Sinan Kozak<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/vadimsemenov\" target=\"_blank\" rel=\"noopener\">Vadim Semenov<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/valery1707\" target=\"_blank\" rel=\"noopener\">Valeriy Vyrva<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/turansky\" target=\"_blank\" rel=\"noopener\">Victor Turansky<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/Monchi\" target=\"_blank\" rel=\"noopener\">Yuku Kotani<\/a><\/li>\n<\/ul>\n","protected":false},"author":811,"featured_media":55600,"comment_status":"open","ping_status":"closed","template":"","categories":[826,909],"tags":[],"cross-post-tag":[],"acf":[],"_links":{"self":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/kotlin\/58264"}],"collection":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/kotlin"}],"about":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/types\/kotlin"}],"author":[{"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=58264"}],"version-history":[{"count":0,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/kotlin\/58264\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/media\/55600"}],"wp:attachment":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/media?parent=58264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/categories?post=58264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/tags?post=58264"},{"taxonomy":"cross-post-tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/cross-post-tag?post=58264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}