{"id":717,"date":"2012-11-27T01:56:24","date_gmt":"2012-11-26T16:56:24","guid":{"rendered":"http:\/\/www.techscore.com\/blog\/?p=717"},"modified":"2018-11-14T16:33:59","modified_gmt":"2018-11-14T07:33:59","slug":"scala-%e6%89%8b%e7%bf%92%e3%81%84","status":"publish","type":"post","link":"https:\/\/www.techscore.com\/blog\/2012\/11\/27\/scala-%e6%89%8b%e7%bf%92%e3%81%84\/","title":{"rendered":"Scala \u624b\u7fd2\u3044"},"content":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001\u9234\u6728\u3067\u3059\u3002<\/p>\n<p>Scala \u3084\u3063\u3066\u307f\u3088\u3046\u304b\u306a\u3001\u3068\u3044\u3046\u65b9\u3078\u306e\u30a8\u30f3\u30c8\u30ea\u3067\u3059\u3002<\/p>\n<p>\u30b3\u30fc\u30c9\u3068\u5b9f\u884c\u7d50\u679c\u3092\u591a\u3081\u306b\u8f09\u305b\u307e\u3057\u305f\u306e\u3067\u3001\u305c\u3072\u304a\u624b\u5143\u3067\u5b9f\u884c\u3057\u306a\u304c\u3089\u8aad\u307f\u9032\u3081\u3066\u3044\u305f\u3060\u3051\u305f\u3089\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h2>Scala \u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h2>\n<p><a title=\"The Scala Programming Language\" href=\"http:\/\/www.scala-lang.org\" target=\"_blank\">Scala \u306e\u516c\u5f0f\u30b5\u30a4\u30c8<\/a>\u304b\u3089 Scala \u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u73fe\u6642\u70b9\u3067\u306e\u5b89\u5b9a\u7248\u306e\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u306f 2.9.2 \u3067\u3059\u3002<\/p>\n<p>\u5c55\u958b\u3057\u3066\u30d1\u30b9\u3092\u901a\u3059\u306a\u3069\u3059\u308c\u3070\u6e96\u5099\u5b8c\u4e86\u3067\u3059\uff01<\/p>\n<h2>Hello Scala!<\/h2>\n<p>\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u306f\u300cHello Scala!\u300d\u3068\u8868\u793a\u3059\u308b Scala \u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">println(\"Hello Scala!\")<\/pre>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>println \u30e1\u30bd\u30c3\u30c9\u3067\u6a19\u6e96\u51fa\u529b\u306b\u51fa\u529b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<li>Java \u3068\u540c\u3058\u304f\u3001\u6587\u5b57\u5217\u306f\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\uff08\"\uff09\u3067\u56f2\u307f\u307e\u3059\u3002<\/li>\n<li>Java \u3068\u7570\u306a\u308a\u3001\u6587\u672b\u306e\u30bb\u30df\u30b3\u30ed\u30f3\uff08;\uff09\u306f\u4e0d\u8981\u3067\u3059\u3002<\/li>\n<\/ul>\n<h2>Scala \u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c<\/h2>\n<p>Scala \u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001\u30a4\u30f3\u30bf\u30d7\u30ea\u30bf\u3068\u3057\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u3082\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<br \/>\nscala \u30b3\u30de\u30f3\u30c9\u306f Scala \u306e\u30a4\u30f3\u30bf\u30d7\u30ea\u30bf\u3001scalac \u30b3\u30de\u30f3\u30c9\u306f Scala \u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u3059\u3002<\/p>\n<h3>scala \u30b3\u30de\u30f3\u30c9\u3067\u5bfe\u8a71\u7684\u306b\u5b9f\u884c\u3059\u308b\u65b9\u6cd5<\/h3>\n<p>scala \u30b3\u30de\u30f3\u30c9\u3092\u5f15\u6570\u7121\u3057\u3067\u5b9f\u884c\u3059\u308b\u3068\u3001\u5bfe\u8a71\u7684\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5165\u529b\u30fb\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3044\u308f\u3086\u308b REPL\uff08Read-Eval-Print Loop\uff09\u3067\u3059\u3002<\/p>\n<p>REPL \u3067\u306f\u5165\u529b\u3057\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u3059\u3050\u306b\u8a55\u4fa1\u30fb\u5b9f\u884c\u30fb\u7d50\u679c\u306e\u5370\u5b57\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>\u624b\u8efd\u306b\u5b9f\u884c\u7d50\u679c\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3001\u975e\u5e38\u306b\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">$ scala\r\nWelcome to Scala version 2.9.2 (OpenJDK Server VM, Java 1.6.0_24).\r\nType in expressions to have them evaluated.\r\nType :help for more information.\r\n\r\nscala&gt; println(\"Hello Scala!\")\r\nHello Scala!<\/pre>\n<h3>\u00a0scala \u30b3\u30de\u30f3\u30c9\u306e -e \u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5<\/h3>\n<p>scala \u30b3\u30de\u30f3\u30c9\u306e -e \u30aa\u30d7\u30b7\u30e7\u30f3\u3067 Scala \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30ef\u30f3\u30e9\u30a4\u30ca\u30fc\u5411\u3051\u306e\u5b9f\u884c\u65b9\u6cd5\u3068\u8a00\u3048\u307e\u3059\u3002<\/p>\n<p>Scala \u3067\u30ef\u30f3\u30e9\u30a4\u30ca\u30fc\u3092\u66f8\u304f\u3053\u3068\u306f\u5c11\u306a\u3044\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u4f55\u304b\u306e\u62cd\u5b50\u3067\u4f7f\u3046\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"lang:default decode:true\">$ scala -e 'println(\"Hello Scala!\")'\r\nHello Scala!<\/pre>\n<h3>\u00a0scala \u30b3\u30de\u30f3\u30c9\u3067\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\u3057\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u65b9\u6cd5<\/h3>\n<p>\u4e8b\u524d\u306b Scala \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\u3057\u3066\u304a\u304d\u3001\u305d\u308c\u3092 scala \u30b3\u30de\u30f3\u30c9\u3067\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30f3\u30d1\u30a4\u30eb\u306f\u884c\u308f\u308c\u305a\u3001\u30a4\u30f3\u30bf\u30d7\u30ea\u30bf\u3068\u3057\u3066\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001\u300cHello.scala\u300d\u3068\u3044\u3046\u540d\u524d\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3001\u4ee5\u4e0b\u306e\u5185\u5bb9\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">println(\"Hello Scala!\")<\/pre>\n<p>\u305d\u3057\u3066\u3001scala \u30b3\u30de\u30f3\u30c9\u3067\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">$ scala Hello.scala\r\nHello Scala!<\/pre>\n<h3>\u00a0scalac \u30b3\u30de\u30f3\u30c9\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3001scala \u30b3\u30de\u30f3\u30c9\u3067\u5b9f\u884c\u3059\u308b\u65b9\u6cd5<\/h3>\n<p>\u307e\u305a\u3001\u300cHello.scala\u300d\u3068\u3044\u3046\u540d\u524d\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3001\u4ee5\u4e0b\u306e\u5185\u5bb9\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">object Hello {\r\n\u00a0\u00a0\u00a0 def main(args: Array[String]) = {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 println(\"Hello Scala!\")\r\n\u00a0\u00a0\u00a0 }\r\n}<\/pre>\n<p>\u6b21\u306b\u3001scalac \u30b3\u30de\u30f3\u30c9\u3067\u3001\u4f5c\u6210\u3057\u305f\u300cHello.scala\u300d\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">$ scalac Hello.scala<\/pre>\n<p>\u30b3\u30f3\u30d1\u30a4\u30eb\u306b\u6210\u529f\u3059\u308b\u3068\u3001\u300cHello$.class\u300d\u3068\u300cHello.class\u300d\u304c\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>scala \u30b3\u30de\u30f3\u30c9\u3067\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">$ scala Hello\r\nHello Scala!<\/pre>\n<p>Scala \u306e\u30d5\u30a1\u30a4\u30eb\u306f Java \u306e\u30af\u30e9\u30b9\u30d5\u30a1\u30a4\u30eb\u306a\u306e\u3067\u3001java \u30b3\u30de\u30f3\u30c9\u3067\u5b9f\u884c\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u306f Scala \u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30af\u30e9\u30b9\u30d1\u30b9\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">$ java -cp $SCALA_HOME\/lib\/scala-library.jar:. Hello\r\nHello Scala!<\/pre>\n<h2>\u00a0\u30b3\u30e1\u30f3\u30c8<\/h2>\n<h3>\u5358\u4e00\u884c\u30b3\u30e1\u30f3\u30c8<\/h3>\n<p>\u5358\u4e00\u884c\u30b3\u30e1\u30f3\u30c8\u306f \/\/ \u304b\u3089\u59cb\u3081\u307e\u3059\u3002\u884c\u672b\u307e\u3067\u304c\u30b3\u30e1\u30f3\u30c8\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">\/\/ \u5358\u4e00\u884c\u30b3\u30e1\u30f3\u30c8<\/pre>\n<h3>\u00a0\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8<\/h3>\n<p>\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\u306f \/* \u3067\u958b\u59cb\u3057\u3001*\/ \u3067\u7d42\u4e86\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">\/*\r\n\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\r\n*\/\r\n\r\n\/*\r\n\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\r\n    \/*\r\n    \u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\u306f\u30cd\u30b9\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\r\n    *\/\r\n*\/<\/pre>\n<h2>\u00a0\u5909\u6570<\/h2>\n<h3>\u5ba3\u8a00<\/h3>\n<p>\u5909\u6570\u306f val \u307e\u305f\u306f var \u3067\u5ba3\u8a00\u3057\u307e\u3059\u3002Scala \u306e\u6301\u3064\u578b\u63a8\u8ad6\u306b\u3088\u308a\u3001\u5909\u6570\u306e\u578b\u3092\u660e\u793a\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; val x = 1\r\nx: Int = 1\r\n\r\nscala&gt; var y = 2\r\ny: Int = 2<\/pre>\n<p>\u5909\u6570\u306e\u578b\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; val z:Int = 3\r\nz: Int = 3<\/pre>\n<h3>\u00a0\u518d\u4ee3\u5165\uff08mutable \/ immutable\uff09<\/h3>\n<p>val \u3067\u5ba3\u8a00\u3057\u305f\u5909\u6570\u306f\u518d\u4ee3\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; x = 10\r\n&lt;console&gt;:8: error: reassignment to val\r\n       x = 10\r\n         ^<\/pre>\n<p>var \u3067\u5ba3\u8a00\u3055\u308c\u305f\u5909\u6570\u306b\u306f\u518d\u4ee3\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; y = 20\r\ny: Int = 20<\/pre>\n<p>\u901a\u5e38\u306f val \u3092\u4f7f\u7528\u3057\u3001\u518d\u4ee3\u5165\u304c\u5fc5\u8981\u306a\u5834\u5408\u306e\u307f var \u3092\u4f7f\u3046\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h2>\u30ea\u30c6\u30e9\u30eb<\/h2>\n<h3>\u30ea\u30c6\u30e9\u30eb\u306e\u7a2e\u985e<\/h3>\n<p>\u30ea\u30c6\u30e9\u30eb\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u6574\u6570<\/li>\n<li>\u4e0d\u52d5\u5c0f\u6570\u70b9\u6570<\/li>\n<li>\u8ad6\u7406\u5024<\/li>\n<li>\u6587\u5b57<\/li>\n<li>\u6587\u5b57\u5217<\/li>\n<li>\u30b7\u30f3\u30dc\u30eb<\/li>\n<li>XML<\/li>\n<\/ul>\n<h3>\u6574\u6570<\/h3>\n<p>Int \u578b\u306e\u30ea\u30c6\u30e9\u30eb\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">\/\/ 10 \u9032\u6570\u8868\u8a18\r\n0\r\n123\r\n\r\n\/\/ 16 \u9032\u6570\u8868\u8a18\r\n0xff\r\n0xFF\r\n\r\n\/\/ 8 \u9032\u6570\u8868\u8a18\r\n010<\/pre>\n<p>Long \u578b\u306e\u30ea\u30c6\u30e9\u30eb\u306f\u672b\u5c3e\u306b l \u307e\u305f\u306f L \u3092\u4ed8\u52a0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">\/\/ 10 \u9032\u6570\u8868\u8a18\r\n0l\r\n123L\r\n\r\n\/\/ 16 \u9032\u6570\u8868\u8a18 (10 \u9032\u6570\u3067 255)\r\n0xffl\r\n0xffL\r\n0xFFl\r\n0xFFL\r\n\r\n\/\/ 8 \u9032\u6570\u8868\u8a18 (10 \u9032\u6570\u3067 8)\r\n010l\r\n010L<\/pre>\n<h3>\u00a0\u4e0d\u52d5\u5c0f\u6570\u70b9\u6570<\/h3>\n<p>Double \u578b\u306e\u30ea\u30c6\u30e9\u30eb\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">1.0\r\n1.0d\r\n1.0D<\/pre>\n<p>Float \u578b\u306e\u30ea\u30c6\u30e9\u30eb\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">1.0f\r\n1.0F<\/pre>\n<p>\u4e0d\u52d5\u5c0f\u6570\u70b9\u6570\u306f\u6307\u6570\u8868\u8a18\u3067\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">\/\/ 314 * 0.01\r\n314e-2\r\n\r\n\/\/ 1 * 0.01\r\n1e-2\r\n\r\n\/\/ 1 * 0.1\r\n1e-1\r\n\r\n\/\/ 1 * 1\r\n1e0\r\n\r\n\/\/ 1 * 10\r\n1e1\r\n\r\n\/\/ 1 * 100\r\n1e2<\/pre>\n<h3>\u00a0\u8ad6\u7406\u5024<\/h3>\n<p>Boolean \u578b\u306e\u30ea\u30c6\u30e9\u30eb\u306f true \u307e\u305f\u306f false \u3067\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">\/\/ \u771f\r\ntrue\r\n\r\n\/\/ \u507d\r\nfalse<\/pre>\n<h3>\u00a0\u6587\u5b57<\/h3>\n<p>Char \u578b\u306e\u30ea\u30c6\u30e9\u30eb\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">\/\/ \u901a\u5e38\u6587\u5b57\r\n'a'\r\n'\u3042'\r\n\r\n\/\/ \u7279\u6b8a\u6587\u5b57\r\n'\\n'\r\n\r\n\/\/ Unicode \u8868\u8a18\r\n'\\u0061'<\/pre>\n<h3>\u00a0\u6587\u5b57\u5217<\/h3>\n<p>String \u578b\u306e\u30ea\u30c6\u30e9\u30eb\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">\/\/ \u5358\u4e00\u884c\u6587\u5b57\u5217\r\n\"Hello Scala\"\r\n\"Scalable\\nLanguage\"\r\n\r\n\/\/ \u8907\u6570\u884c\u6587\u5b57\u5217\r\n\"\"\"Scalable\r\nLanguage\"\"\"<\/pre>\n<h3>\u00a0\u30b7\u30f3\u30dc\u30eb<\/h3>\n<p>Symbol \u578b\u306e\u30ea\u30c6\u30e9\u30eb\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">'x\r\n'name<\/pre>\n<h3>\u00a0XML<\/h3>\n<p>XML \u30ea\u30c6\u30e9\u30eb\uff08scala.xml.Elem \u578b\u306e\u30ea\u30c6\u30e9\u30eb\uff09\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">&lt;language&gt;\r\n    &lt;name&gt;Scala&lt;\/name&gt;\r\n    &lt;version&gt;2.9.0&lt;\/version&gt;\r\n&lt;\/language&gt;<\/pre>\n<p>XML \u30ea\u30c6\u30e9\u30eb\u306b\u306f\u5909\u6570\u306e\u5024\u3092\u57cb\u3081\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; val name = \"Scala\"\r\nname: java.lang.String = Scala\r\n\r\nscala&gt; &lt;language&gt;\r\n     |     &lt;name&gt;{name}&lt;\/name&gt;\r\n     |     &lt;version&gt;2.9.0&lt;\/version&gt;\r\n     | &lt;\/language&gt;\r\nres0: scala.xml.Elem =\r\n&lt;language&gt;\r\n    &lt;name&gt;Scala&lt;\/name&gt;\r\n    &lt;version&gt;2.9.0&lt;\/version&gt;\r\n&lt;\/language&gt;<\/pre>\n<h2>\u00a0\u30b3\u30ec\u30af\u30b7\u30e7\u30f3<\/h2>\n<h3>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u7a2e\u985e<\/h3>\n<p>\u4ee5\u4e0b\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li>Range (\u7bc4\u56f2)<\/li>\n<li>List (\u30ea\u30b9\u30c8)<\/li>\n<li>Array (\u914d\u5217)<\/li>\n<li>Tuple (\u30bf\u30d7\u30eb)<\/li>\n<li>Map (\u30de\u30c3\u30d7)<\/li>\n<li>Option (\u30aa\u30d7\u30b7\u30e7\u30f3)<\/li>\n<\/ul>\n<h3>Range<\/h3>\n<p>Range \u306f\u7bc4\u56f2\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; 1 to 3\r\nres0: scala.collection.immutable.Range.Inclusive = Range(1, 2, 3)<\/pre>\n<p>Range \u306f\u9045\u5ef6\u578b\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3067\u3059\u3002\u9045\u5ef6\u578b\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u542b\u307e\u308c\u308b\u8981\u7d20\u306f\u3001\u5b9f\u969b\u306b\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u307e\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3055\u308c\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; (1 to 2147483647).take(3)\r\nres0: scala.collection.immutable.Range = Range(1, 2, 3)<\/pre>\n<p>\u300c(1 to 2147483647)\u300d\u306f 1 \u304b\u3089 2147483647 \u307e\u3067\u306e\u7bc4\u56f2\u3092\u8868\u3057\u307e\u3059\u304c\u3001\u300c(1 to 2147483647).take(3)\u300d\u3067\u306f\u5148\u982d\u306e 3 \u8981\u7d20\u306e\u307f\u3092\u53d6\u308a\u51fa\u3057\u3066\u3044\u307e\u3059\u30021 \u304b\u3089 2147483647 \u307e\u3067\u306e\u6574\u6570\u304c\u30e1\u30e2\u30ea\u4e0a\u306b\u4e57\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h3>List<\/h3>\n<p>\u30ea\u30b9\u30c8\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; List(1, 2, 3)\r\nres0: List[Int] = List(1, 2, 3)<\/pre>\n<h3>\u00a0Array<\/h3>\n<p>\u914d\u5217\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; Array(1, 2, 3)\r\nres0: Array[Int] = Array(1, 2, 3)<\/pre>\n<h3>\u00a0Tuple<\/h3>\n<p>\u30bf\u30d7\u30eb\u3068\u306f\u3001\u30c7\u30fc\u30bf\u578b\u306b\u95a2\u4fc2\u306a\u304f\u3001\u3044\u304f\u3064\u304b\u306e\u5024\u306e\u7d44\u3092\u8868\u3059\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; (1, 2, 3)\r\nres0: (Int, Int, Int) = (1,2,3)<\/pre>\n<h2>\u00a0\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u64cd\u4f5c<\/h2>\n<h3>foreach<\/h3>\n<p>foreach \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u6307\u5b9a\u3057\u305f\u30e1\u30bd\u30c3\u30c9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; (1 to 10).foreach(println)\r\n1\r\n2\r\n3\r\n4\r\n5\r\n6\r\n7\r\n8\r\n9\r\n10<\/pre>\n<h3>\u00a0filter<\/h3>\n<p>filter \u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304b\u3089\u7279\u5b9a\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; (1 to 10).filter(x =&gt; x % 2 == 0).foreach(println)\r\n2\r\n4\r\n6\r\n8\r\n10<\/pre>\n<h3>filterNot<\/h3>\n<p>filterNot \u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304b\u3089\u7279\u5b9a\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u3092\u9664\u5916\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; (1 to 10).filterNot(x =&gt; x % 2 == 0).foreach(println)\r\n1\r\n3\r\n5\r\n7\r\n9<\/pre>\n<h3>\u00a0map<\/h3>\n<p>map \u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5404\u8981\u7d20\u306b\u6307\u5b9a\u3057\u305f\u95a2\u6570\u3092\u9069\u7528\u3057\u305f\u7d50\u679c\u3092\u4fdd\u6301\u3059\u308b\u65b0\u3057\u3044\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; (1 to 10).map(x =&gt; x * x).foreach(println)\r\n1\r\n4\r\n9\r\n16\r\n25\r\n36\r\n49\r\n64\r\n81\r\n100<\/pre>\n<h3>\u00a0foldLeft<\/h3>\n<p>foldLeft \u306f\u7573\u307f\u8fbc\u307f\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\u30011 \u304b\u3089 10 \u307e\u3067\u306e\u6574\u6570\u306e\u5408\u8a08\u306f\u6c42\u3081\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">scala&gt; println((1 to 10).foldLeft(0)((x, y) =&gt; x + y))\r\n55<\/pre>\n<h2>\u00a0Fizz-Buzz \u554f\u984c<\/h2>\n<p>Scala\u3067Fizz-Buzz\u3092\u66f8\u304f\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">scala&gt; (1 to 100).map(x =&gt; x match {\r\n    case x if x % 15 == 0 =&gt; \"FizzBuzz\"\r\n    case x if x %  5 == 0 =&gt; \"Buzz\"\r\n    case x if x %  3 == 0 =&gt; \"Fizz\"\r\n    case x                =&gt; x\r\n}).foreach(println _)\r\n1\r\n2\r\nFizz\r\n4\r\nBuzz\r\nFizz\r\n7\r\n8\r\nFizz\r\nBuzz\r\n...(\u4e2d\u7565)...\r\nFizzBuzz\r\n91\r\n92\r\nFizz\r\n94\r\nBuzz\r\nFizz\r\n97\r\n98\r\nFizz\r\nBuzz<\/pre>\n<h2>Enjoy Scala!<\/h2>\n<p>\u99c6\u3051\u8db3\u3067\u3057\u305f\u304c\u3001Scala\u306e\u96f0\u56f2\u6c17\u3092\u611f\u3058\u3066\u3044\u305f\u3060\u3051\u305f\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f\u3001Enjoy Scala!<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001\u9234\u6728\u3067\u3059\u3002<\/p>\n<p>Scala \u3084\u3063\u3066\u307f\u3088\u3046\u304b\u306a\u3001\u3068\u3044\u3046\u65b9\u3078\u306e\u30a8\u30f3\u30c8\u30ea\u3067\u3059\u3002<\/p>\n<p>\u30b3\u30fc\u30c9\u3068\u5b9f\u884c\u7d50\u679c\u3092\u591a\u3081\u306b\u8f09\u305b\u307e\u3057\u305f\u306e\u3067\u3001\u305c\u3072\u304a\u624b\u5143\u3067\u5b9f\u884c\u3057\u306a\u304c\u3089\u8aad\u307f\u9032\u3081\u3066\u3044\u305f\u3060\u3051\u305f\u3089\u3068\u601d\u3044\u307e\u3059\u3002<br \/><a href=\"https:\/\/www.techscore.com\/blog\/2012\/11\/27\/scala-%e6%89%8b%e7%bf%92%e3%81%84\/\">\u7d9a\u304d\u3092\u8aad\u3080...<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[55],"_links":{"self":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/717"}],"collection":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/comments?post=717"}],"version-history":[{"count":1,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/717\/revisions"}],"predecessor-version":[{"id":18016,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/717\/revisions\/18016"}],"wp:attachment":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/media?parent=717"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/categories?post=717"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/tags?post=717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}