{"id":41195,"date":"2026-03-05T07:09:25","date_gmt":"2026-03-05T07:09:25","guid":{"rendered":"https:\/\/www.railscarma.com\/?p=41195"},"modified":"2026-03-05T07:09:29","modified_gmt":"2026-03-05T07:09:29","slug":"ruby%e3%81%ae%e8%a4%87%e6%95%b0%e8%a1%8c%e3%82%b3%e3%83%a1%e3%83%b3%e3%83%88%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6%e4%be%8b%e3%82%92%e6%8c%99%e3%81%92%e3%81%a6%e8%aa%ac%e6%98%8e","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/ruby%e3%81%ae%e8%a4%87%e6%95%b0%e8%a1%8c%e3%82%b3%e3%83%a1%e3%83%b3%e3%83%88%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6%e4%be%8b%e3%82%92%e6%8c%99%e3%81%92%e3%81%a6%e8%aa%ac%e6%98%8e\/","title":{"rendered":"Ruby\u306e\u30de\u30eb\u30c1\u30e9\u30a4\u30f3\u30b3\u30e1\u30f3\u30c8\u3068\u305d\u306e\u4f8b"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"41195\" class=\"elementor elementor-41195\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1d3daf62 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1d3daf62\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3cc8ca0e\" data-id=\"3cc8ca0e\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-633c514d elementor-widget elementor-widget-text-editor\" data-id=\"633c514d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><\/p>\n<p>\u30a8\u30ec\u30ac\u30f3\u30c8\u3067\u958b\u767a\u8005\u306b\u512a\u3057\u3044\u69cb\u6587\u3067\u77e5\u3089\u308c\u308bRuby\u3067\u306f\u3001\u4ed6\u306e\u591a\u304f\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u6bd4\u8f03\u3057\u3066\u3001\u30b3\u30e1\u30f3\u30c8\u306e\u6271\u3044\u304c\u3084\u3084\u72ec\u7279\u3067\u3059\u30021\u884c\u30b3\u30e1\u30f3\u30c8\uff08#\u3067\u59cb\u307e\u308b\uff09\u306f\u3069\u3053\u306b\u3067\u3082\u3042\u308a\u3001\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\uff08\u307e\u305f\u306f\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\uff09\u306b\u306f\u5c02\u7528\u306e\u69cb\u6587\u304c\u3042\u308a\u3001\u591a\u304f\u306eRuby\u958b\u767a\u8005\u304c\u3053\u306e\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002 <a href=\"https:\/\/www.railscarma.com\/ja\/ruby-on-rails-%e9%96%8b%e7%99%ba%e8%80%85%e3%82%92%e9%9b%87%e3%81%86\/\">Ruby\u958b\u767a\u8005<\/a> \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Ruby \u306e\u30de\u30eb\u30c1\u30e9\u30a4\u30f3\u30b3\u30e1\u30f3\u30c8\u30b7\u30b9\u30c6\u30e0\u306b\u3064\u3044\u3066\u6df1\u304f\u6398\u308a\u4e0b\u3052\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Ruby\u306e\u30de\u30eb\u30c1\u30e9\u30a4\u30f3\u30b3\u30e1\u30f3\u30c8\u30b7\u30b9\u30c6\u30e0\u306b\u3064\u3044\u3066\u3001\u305d\u306e\u4ed5\u7d44\u307f\u3001\u306a\u305c\u3053\u306e\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u308b\u306e\u304b\u3001\u305d\u306e\u7656\u3001\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3001\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3001\u5b9f\u969b\u306e\u4f7f\u7528\u4f8b\u3001\u305d\u3057\u3066\u5b9f\u7528\u7684\u306a\u4f8b\u306a\u3069\u3001\u6df1\u304f\u6398\u308a\u4e0b\u3052\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f <a href=\"https:\/\/docs.ruby-lang.org\/en\/master\/syntax\/comments_rdoc.html\">\u516c\u5f0f\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8<\/a> \u69cb\u6587\uff08=begin \/ =end\uff09\u3068\u3001\u540c\u3058\u52b9\u679c\u3092\u5f97\u308b\u305f\u3081\u306b\u8907\u6570\u306e\u5358\u4e00\u884c\u30b3\u30e1\u30f3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3001\u306f\u308b\u304b\u306b\u4e00\u822c\u7684\u306a\u30a4\u30c7\u30a3\u30aa\u30e0\u3002\u6700\u5f8c\u306b\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u3044\u3064\uff08\u305d\u3057\u3066\u3044\u3064\uff09\u4f7f\u3046\u3079\u304d\u3067\u306a\u3044\u304b\u3092\u6b63\u78ba\u306b\u7406\u89e3\u3067\u304d\u308b\u3060\u308d\u3046\u3002.<\/p>\n<h2><b>1.Ruby\u306e2\u3064\u306e\u30b3\u30e1\u30f3\u30c8\u30bf\u30a4\u30d7\uff1a\u30a4\u30f3\u30e9\u30a4\u30f3\u3068\u30d6\u30ed\u30c3\u30af<\/b><\/h2>\n<p>Ruby\u306e\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff08ruby-lang.org syntax reference\uff09\u306b\u3088\u308b\u3068\u3001Ruby\u306f2\u7a2e\u985e\u306e\u30b3\u30fc\u30c9\u30b3\u30e1\u30f3\u30c8\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\uff1a<\/p>\n<p><\/p>\n<ul class=\"wp-block-list\"><p><\/p>\n<li>\u30a4\u30f3\u30e9\u30a4\u30f3\u30fb\u30b3\u30e1\u30f3\u30c8 - #\u3067\u59cb\u307e\u308a\u3001\u884c\u672b\u307e\u3067\u7d9a\u304f<\/li>\n<p><\/p>\n<li>\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8 - =begin\u3067\u59cb\u307e\u308a\uff08\u4e00\u884c\u3067\uff09\u3001=end\u3067\u7d42\u308f\u308b\uff08\u540c\u3058\u304f\u4e00\u884c\u3067\uff09\u3002<\/li>\n<p><\/p>\n<\/ul>\n<p><\/p>\n<p>\u30a4\u30f3\u30e9\u30a4\u30f3\u30fb\u30b3\u30e1\u30f3\u30c8\u304c\u5727\u5012\u7684\u306b\u591a\u3044\u3002\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308b\uff1a<\/p>\n<p><\/p>\n<ul class=\"wp-block-list\"><p><\/p>\n<li>\u4e00\u4eba\u3067\u4e00\u5217\u306b\u4e26\u3076<\/li>\n<p><\/p>\n<li>\u540c\u3058\u884c\u306e\u30b3\u30fc\u30c9\u306e\u5f8c<\/li>\n<p><\/p>\n<li>\u5185\u5074\u30d6\u30ed\u30c3\u30af\u306e\u304f\u307c\u307f<\/li>\n<p><\/p>\n<\/ul>\n<p><\/p>\n<p>\u30eb\u30d3\u30fc<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code><em># \u3053\u308c\u306f\u72ec\u7acb\u3057\u305f\u30b3\u30e1\u30f3\u30c8\u3067\u3059<\/em>\u3002\n\nname = \"Alice\" <em>#\u30a4\u30f3\u30e9\u30a4\u30f3\u30b3\u30e1\u30f3\u30c8<\/em>\u306e\u30b3\u30fc\u30c9\u5f8c\u3067\u3059\u3002\n\n\u30af\u30e9\u30b9\u30e6\u30fc\u30b6\u30fc\n  <em># \u30af\u30e9\u30b9\u5185\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u30b3\u30e1\u30f3\u30c8<\/em>\n  def initialize(name)\n    name = name\n  end\nend<\/code><\/pre>\n<p><\/p>\n<p>\u4e00\u65b9\u3001\u30d6\u30ed\u30c3\u30af\u30fb\u30b3\u30e1\u30f3\u30c8\u306fRuby\u306e\u771f\u306e\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\u6a5f\u69cb\u3060\u304c\u3001\u53b3\u683c\u306a\u898f\u5247\u304c\u3042\u308a\u3001\u5b9f\u7528\u7684\u306a\u4f7f\u3044\u65b9\u306f\u9650\u3089\u308c\u3066\u3044\u308b\u3002.<\/p>\n<h2><b>2.begin\/=end\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u69cb\u6587<\/b><\/h2>\n<p><span style=\"font-size: 16px;\">\u516c\u5f0f\u306e\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\u69cb\u6587\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308b\uff1a<\/span><\/p>\n<p><\/p>\n<p>\u30eb\u30d3\u30fc<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code><em>=\u958b\u59cb\n<\/em><em>\u3053\u308c\u306f\u8907\u6570\u884c\u306e\u30b3\u30e1\u30f3\u30c8\u30d6\u30ed\u30c3\u30af\u3067\u3059\u3002\n<\/em><em>=begin\u3068=end\u306e\u9593\u306fRuby\u30d1\u30fc\u30b5\u306b\u3088\u3063\u3066\u7121\u8996\u3055\u308c\u307e\u3059\u3002\n<\/em> <em>\u3053\u308c\u306f\u8907\u6570\u884c\u306e\u30b3\u30e1\u30f3\u30c8\u30d6\u30ed\u30c3\u30af\u3067\u3059\u3002\n<em>\u3053\u3053\u306b\u306f\u4f55\u884c\u3067\u3082\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\n<\/em><em>\u5404\u884c\u306e\u5148\u982d\u306b#\u3092\u4ed8\u3051\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\n<\/em>&lt;em\n<em>\u3053\u308c\u306f\u9577\u3044\u8aac\u660e\u3084\u8457\u4f5c\u6a29\u8868\u793a\u306b\u4fbf\u5229\u3067\u3059\u3001\n<\/em><em>\u307e\u305f\u306f\u4e00\u6642\u7684\u306b\u30b3\u30fc\u30c9\u306e\u5927\u304d\u306a\u30bb\u30af\u30b7\u30e7\u30f3\u3092\u7121\u52b9\u306b\u3057\u307e\u3059\u3002\n<\/em><em>=\u7d42\u4e86<\/em>\u3002\n\nputs \"\u3053\u306e\u884c\u306f\u6b63\u5e38\u306b\u5b9f\u884c\u3055\u308c\u307e\u3059\"<\/code><\/pre>\n<p><\/p>\n<p>\u30ad\u30fc\u30fb\u30eb\u30fc\u30eb\uff08\u3053\u308c\u3089\u306f\u30d1\u30fc\u30b5\u30fc\u306b\u3088\u3063\u3066\u5f37\u5236\u3055\u308c\u308b\uff09\uff1a<\/p>\n<p><\/p>\n<ol class=\"wp-block-list\" start=\"1\"><p><\/p>\n<li>=begin\u306f\u884c\u982d\u306b\u5358\u72ec\u3067\u73fe\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\uff08\u5148\u982d\u306e\u7a7a\u767d\u306f\u8a31\u3055\u308c\u306a\u3044\uff09\u3002.<\/li>\n<p><\/p>\n<li>\u307e\u305f\u3001=end\u306f\u884c\u982d\u306b\u5358\u72ec\u3067\u73fe\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\uff08\u5148\u982d\u306e\u7a7a\u767d\u306f\u4e0d\u53ef\uff09\u3002.<\/li>\n<p><\/p>\n<li>\u3069\u3061\u3089\u306e\u30de\u30fc\u30ab\u30fc\u30821\u5217\u76ee\uff08\u5de6\u7aef\uff09\u304b\u3089\u30b9\u30bf\u30fc\u30c8\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002.<\/li>\n<p><\/p>\n<li>\u30de\u30fc\u30ab\u30fc\u3068\u30de\u30fc\u30ab\u30fc\u306e\u9593\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306f\u81ea\u7531\u306b\u30a4\u30f3\u30c7\u30f3\u30c8\u3067\u304d\u308b\u3002.<\/li>\n<p><\/p>\n<li>\u30d6\u30ed\u30c3\u30af\u30fb\u30b3\u30e1\u30f3\u30c8\u306f\u3001\u884c\u982d\u306b\u73fe\u308c\u308b\u6700\u521d\u306e=end\u3067\u7d42\u4e86\u3059\u308b\u3002.<\/li>\n<p><\/p>\n<\/ol>\n<p><\/p>\n<p>\u30eb\u30fc\u30eb#1\u3068#2\u306e\u305f\u3081\u3001\u3053\u306e\u69cb\u6587\u306f\u30e1\u30bd\u30c3\u30c9\u3001\u30af\u30e9\u30b9\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u3001\u6761\u4ef6\u6587\u306a\u3069\u306e\u30a4\u30f3\u30c7\u30f3\u30c8\u3055\u308c\u305f\u30d6\u30ed\u30c3\u30af\u306e\u4e2d\u3067\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002.<\/p>\n<p><\/p>\n<p>\u30eb\u30d3\u30fc<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code>def calculate_total(items)\n  =begin <em># \u2190\u69cb\u6587\u30a8\u30e9\u30fc\uff01<\/em>\u3002\n  begin\u304c\u30a4\u30f3\u30c7\u30f3\u30c8\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u3053\u308c\u306f\u6a5f\u80fd\u3057\u306a\u3044\u3002\n  =end\n  items.sum\n\u7d42\u4e86<\/code><\/pre>\n<p><\/p>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u69cb\u6587\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\uff1a<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code>\u69cb\u6587\u30a8\u30e9\u30fc\u3001\u4e88\u671f\u3057\u306a\u3044 '='\u3001`end'\u3092\u671f\u5f85\n  =begin\n   ^<\/code><\/pre>\n<p><\/p>\n<p>\u3053\u306e\u30a4\u30f3\u30c7\u30f3\u30c8\u5236\u9650\u306f\u3001\u591a\u304f\u306e\u7d4c\u9a13\u8c4a\u5bcc\u306aRuby\u958b\u767a\u8005\u304c\u65e5\u5e38\u7684\u306a\u30b3\u30fc\u30c9\u3067=begin\/=end\u3092\u907f\u3051\u308b\u6700\u5927\u306e\u7406\u7531\u3067\u3042\u308b\u3002.<\/p>\n<h2><b>3.\u5b9f\u7528\u7684\u306a\u30de\u30eb\u30c1\u30e9\u30a4\u30f3\u30fb\u30b3\u30e1\u30f3\u30c8\u8907\u6570\u306e#\u56de\u7dda<\/b><\/h2>\n<p>\u771f\u306e\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u306f\u975e\u5e38\u306b\u5236\u9650\u7684\u306a\u306e\u3067\u3001\u8907\u6570\u884c\u3092\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3057\u305f\u308a\u6587\u66f8\u5316\u3057\u305f\u308a\u3059\u308b\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u6a19\u6e96\u306e\u65b9\u6cd5\u306f\u3001\u5358\u306b\u5404\u884c\u306e\u524d\u306b#\u3092\u4ed8\u3051\u308b\u3060\u3051\u3067\u3042\u308b\uff1a<\/p>\n<p><\/p>\n<p>\u30eb\u30d3\u30fc<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code><em># \u3053\u308c\u306fRuby\u3067\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\u3092\u66f8\u304f\u6700\u3082\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u3067\u3059<\/em>\u3002\n<em># \u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30e1\u30bd\u30c3\u30c9\u5168\u4f53\u3092\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\n<em># def old_broken_method<\/em> \u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3057\u307e\u3059\u3002\n<em># puts \"\u3053\u308c\u306f\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3057\u3066\u3044\u307e\u3057\u305f\u3002\n<em># do_dangerous_stuff!\n<em># crash_the_program<\/em>\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\n<em># end<\/em>\n\n<em># \u3042\u308b\u3044\u306f\u3082\u3063\u3068\u9577\u3044\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u66f8\u304f:<\/em>\n<em># \u518d\u5e30\u3092\u4f7f\u3063\u3066 n \u306e\u968e\u4e57\u3092\u8a08\u7b97\u3059\u308b<\/em>\u3002\n<em># \u8b66\u544a: \u5927\u304d\u306a n (&gt; ~1000) \u3067\u306f\u975e\u5e38\u306b\u9045\u3044<\/em>\u3002\n<em># \u5b9f\u7a3c\u50cd\u30b3\u30fc\u30c9\u3067\u306f\u53cd\u5fa9\u8a08\u7b97\u306e\u65b9\u304c\u3088\u3044<\/em>\u3002\n<em># \u4f8b:<\/em>\n<em># factorial(5) # =&gt; 120<\/em> <em># factorial(5) # =&gt; 120<\/em>\n<em># factorial(0) # =&gt; 1<\/em> <em># factorial(0) # =&gt; 1<\/em> =&gt; 1\ndef factorial(n)\n  n &lt;= 1\u306a\u30891\u3092\u8fd4\u3059\n  n * factorial(n - 1)\n\u7d42\u4e86<\/code><\/pre>\n<p><\/p>\n<p>\u6700\u8fd1\u306e\u30a8\u30c7\u30a3\u30bf\u30fc\u3084IDE\uff08VS Code\u3001RubyMine\u3001Sublime\u3001\u30d7\u30e9\u30b0\u30a4\u30f3\u4ed8\u304dVim\u306a\u3069\uff09\u306f\u3001\u3053\u308c\u3092\u7c21\u5358\u306b\u3067\u304d\u308b\uff1a<\/p>\n<p><\/p>\n<ul class=\"wp-block-list\"><p><\/p>\n<li>\u8907\u6570\u884c\u3092\u30cf\u30a4\u30e9\u30a4\u30c8 \u2192 Ctrl+\/ (macOS\u3067\u306fCmd+\/) \u3092\u62bc\u3059 \u2192 \u5404\u884c\u306b#\u63a5\u982d\u8f9e\u304c\u4ed8\u304f<\/li>\n<p><\/p>\n<li>\u540c\u3058\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8\u3092\u3082\u3046\u4e00\u5ea6\u62bc\u3059 \u2192 \u63a5\u982d\u8f9e\u3092\u524a\u9664\u3059\u308b<\/li>\n<p><\/p>\n<\/ul>\n<p><\/p>\n<p>\u3053\u306e\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u306f\u975e\u5e38\u306b\u9ad8\u901f\u3067\u4fe1\u983c\u6027\u304c\u9ad8\u3044\u306e\u3067\u3001\u307b\u3068\u3093\u3069\u306eRubyist\u306f=begin \/ =end\u306e\u5fc5\u8981\u6027\u3092\u611f\u3058\u306a\u3044\u3002.<\/p>\n<h2><b>4.2\u3064\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u6bd4\u8f03\u3059\u308b<\/b><\/h2>\n<p><\/p>\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<tbody>\n<tr>\n<th>\u7279\u5fb4<\/th>\n<th>\u8907\u6570\u306e#\u30e9\u30a4\u30f3<\/th>\n<th>=\u30d6\u30ed\u30c3\u30af\u958b\u59cb\uff0f\u30d6\u30ed\u30c3\u30af\u7d42\u4e86<\/th>\n<\/tr>\n<tr>\n<td>\u30a4\u30f3\u30c7\u30f3\u30c8\u53ef\u80fd<\/td>\n<td>\u306f\u3044<\/td>\n<td>\u30de\u30fc\u30ab\u30fc\u306f1\u5217\u76ee\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044<\/td>\n<\/tr>\n<tr>\n<td>\u30e1\u30bd\u30c3\u30c9\/\u30af\u30e9\u30b9\u306e\u5185\u90e8\u3067\u52d5\u4f5c\u3059\u308b<\/td>\n<td>\u306f\u3044<\/td>\n<td>\u3044\u3044\u3048<\/td>\n<\/tr>\n<tr>\n<td>\u30a8\u30c7\u30a3\u30bf\u30fc\u306e\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8\u3067\u7c21\u5358\u306b\u5207\u308a\u66ff\u3048\u3089\u308c\u308b<\/td>\n<td>\u306f\u3044\uff08\u307b\u3068\u3093\u3069\u306e\u30a8\u30c7\u30a3\u30bf\u306b\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u307e\u3059\uff09<\/td>\n<td>\u3044\u3044\u3048<\/td>\n<\/tr>\n<tr>\n<td>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u306f\u304d\u308c\u3044\u306b\u898b\u3048\u308b<\/td>\n<td>\u826f\u3044\uff08\u7279\u306b\u30e4\u30fc\u30c9\/RDOC\u30de\u30fc\u30af\u30a2\u30c3\u30d7\u3067\uff09<\/td>\n<td>\u8a31\u5bb9\u7bc4\u56f2\u3060\u304c\u3001\u3042\u307e\u308a\u4e00\u822c\u7684\u3067\u306f\u306a\u3044<\/td>\n<\/tr>\n<tr>\n<td>\u5165\u308c\u5b50\u306b\u3067\u304d\u308b<\/td>\n<td>\u306f\u3044\uff08#\u304c\u5897\u3048\u308b\u3060\u3051\uff09<\/td>\n<td>\u3044\u3044\u3048<\/td>\n<\/tr>\n<tr>\n<td>\u5b9f\u969b\u306eRuby\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b<\/td>\n<td>\u975e\u5e38\u306b\u4e00\u822c\u7684<\/td>\n<td>\u307e\u308c\uff08\u307b\u3068\u3093\u3069\u306f\u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u304b\u975e\u5e38\u306b\u53e4\u3044\u30b3\u30fc\u30c9\u306b\u542b\u307e\u308c\u308b\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u30d1\u30fc\u30b8\u30f3\u30b0\u30fb\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff<\/td>\n<td>\u3054\u304f\u308f\u305a\u304b<\/td>\n<td>\u3054\u304f\u308f\u305a\u304b<\/td>\n<\/tr>\n<tr>\n<td>\u516c\u5f0f\u7279\u96c6<\/td>\n<td>\u306f\u3044\uff08\u30a4\u30f3\u30e9\u30a4\u30f3\u30b3\u30e1\u30f3\u30c8\uff09<\/td>\n<td>\u306f\u3044\uff08\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p><\/p>\n<h2><b>5.begin\uff08\u958b\u59cb\uff09\uff0f\uff1dend\uff08\u7d42\u4e86\uff09\u304c\u307e\u3060\u73fe\u308c\u308b\u7279\u6b8a\u306a\u4f7f\u7528\u4f8b<\/b><\/h2>\n<p>\u4e00\u822c\u7684\u3067\u306a\u3044\u3068\u306f\u3044\u3048\u3001\u30d6\u30ed\u30c3\u30af\u30fb\u30b3\u30e1\u30f3\u30c8\u69cb\u6587\u306f\u6642\u6298\u5f79\u306b\u7acb\u3063\u305f\u308a\u3001\u906d\u9047\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3002.<\/p>\n<p><b>A.\u30d5\u30a1\u30a4\u30eb\u306e\u5148\u982d\u306b\u57cb\u3081\u8fbc\u307e\u308c\u305f\/RDoc\/YARD\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/b><\/p>\n<p>Ruby\u306e\u30b3\u30a2\u30d5\u30a1\u30a4\u30eb\u3084\u53e4\u3044gem\u306e\u591a\u304f\u306f\u3001\u9577\u3044\u30d5\u30a1\u30a4\u30eb\u30ec\u30d9\u30eb\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n<p><\/p>\n<p>\u30eb\u30d3\u30fc<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code><em>=rdoc\u3092\u59cb\u3081\u308b\n&lt;\/em\n<em>=\u6982\u8981\n<\/em>= \u6982\u8981\n<em>\u3053\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u65e5\u4ed8\/\u6642\u523b\u8a08\u7b97\u306e\u305f\u3081\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\n<\/em><em>\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306b\u5bfe\u5fdc\u3057\u3001\u55b6\u696d\u65e5\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002\n<\/em>\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\n<em>=end<\/em>\n\n\u30e2\u30b8\u30e5\u30fc\u30eb BusinessTime\n  <em># ... \u6b8b\u308a\u306e\u30b3\u30fc\u30c9<\/em>\u3002\n\u7d42\u4e86<\/code><\/pre>\n<p><\/p>\n<p>begin rdoc\u30de\u30fc\u30ab\u30fc\u306f\u3001RDoc\/YARD\u30d1\u30fc\u30b5\u30fc\u306b\u3001\u3053\u308c\u304c\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u3042\u308b\u3053\u3068\u3092\u4f1d\u3048\u307e\u3059\uff08\u901a\u5e38\u306e\u30b3\u30fc\u30c9\u30b3\u30e1\u30f3\u30c8\u3067\u306f\u3042\u308a\u307e\u305b\u3093\uff09\u3002\u30c4\u30fc\u30eb\u306b\u3088\u3063\u3066\u306f\u3001=begin pod\u3084=begin markdown\u306a\u3069\u3082\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n<p><b>B.\u958b\u767a\u4e2d\u306e\u6761\u4ef6\u4ed8\u304d\u30d5\u30a1\u30a4\u30eb\u30bb\u30af\u30b7\u30e7\u30f3<\/b><\/p>\n<p>\u958b\u767a\u8005\u304c\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u3092\u4f7f\u3063\u3066\u3001\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u3067\u30bb\u30af\u30b7\u30e7\u30f3\u5168\u4f53\u3092\u7d20\u65e9\u304f\u7121\u52b9\u306b\u3059\u308b\u306e\u3092\u898b\u304b\u3051\u308b\u3053\u3068\u304c\u3042\u308b\uff1a<\/p>\n<p><\/p>\n<p>\u30eb\u30d3\u30fc<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code><em>=\u958b\u59cb\n<\/em><em>'expensive_debug_gem'\u3092\u8981\u6c42\u3059\u308b\u3002\n<\/em><em>'memory_profiler'\u3092\u8981\u6c42\u3059\u308b\u3002\n&lt;\/em\n<em>MemoryProfiler.report\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\n<\/em><em> #\u306e\u975e\u5e38\u306b\u9045\u3044\u30b3\u30fc\u30c9\u306f\u3053\u3053\u3067\u3059\u3002\n<\/em><em>\u7d42\u4e86\n<\/em><em>=end<\/em>\n\n<em># \u901a\u5e38\u306e\u30a2\u30d7\u30ea\u306e\u30b3\u30fc\u30c9\u304c\u7d9a\u304d\u307e\u3059...<\/em> &lt;\/em<\/code><\/pre>\n<p><\/p>\n<p>C. \u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9\u307e\u305f\u306f\u30b3\u30fc\u30c9\u751f\u6210\u975e\u5e38\u306b\u53e4\u3044Ruby 1.8\/1.9\u306e\u30b3\u30fc\u30c9\u30d9\u30fc\u30b9\u3001Rails\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u30b9\u30b1\u30eb\u30c8\u30f3\u3001\u307e\u305f\u306f\u30c4\u30fc\u30eb\u306b\u3088\u3063\u3066\u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3067\u3001=begin \/ =end\u306b\u906d\u9047\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h2><b>6.\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3068\u9593\u9055\u3044<\/b><\/h2>\n<p><b>\u9593\u9055\u30441\uff1a\u30de\u30fc\u30ab\u30fc\u3092\u30a4\u30f3\u30c7\u30f3\u30c8\u3059\u308b<\/b><\/p>\n<p><\/p>\n<p>\u30eb\u30d3\u30fc<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code>  =begin <em># \u2190\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u30a8\u30e9\u30fc<\/em>\u3002\n    \u91cd\u8981\n  =\u7d42\u4e86<\/code><\/pre>\n<p><\/p>\n<p><b>\u9593\u9055\u30442\uff1a\u7d42\u308f\u308a\u306f\u4e00\u4eba\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3053\u3068\u3092\u5fd8\u308c\u3066\u3044\u308b<\/b><\/p>\n<p><\/p>\n<p>\u30eb\u30d3\u30fc<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code><em>=\u958b\u59cb\n<\/em><em>stuff\n<\/em><em>=end<\/em>\u4f55\u3089\u304b\u306e\u6ce8\u610f <em># \u2190\u69cb\u6587\u30a8\u30e9\u30fc\u3001\u30d1\u30fc\u30b5\u30fc\u306f=end\u3092\u63a2\u3057\u7d9a\u3051\u308b<\/em>\u3002<\/code><\/pre>\n<p><\/p>\n<p><b>\u9593\u9055\u30443\uff1a\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u3092\u671f\u5f85\u3059\u308b<\/b><\/p>\n<p><\/p>\n<p>\u30eb\u30d3\u30fc<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code><em>=\u958b\u59cb\n<\/em><em>\u30b3\u30e1\u30f3\u30c8\n<\/em><em>=\u958b\u59cb\n<\/em><em>\u5185\u5074\u30b3\u30e1\u30f3\u30c8 # \u2190\u7121\u8996\u3055\u308c\u3001\u901a\u5e38\u306e\u30c6\u30ad\u30b9\u30c8\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3002\n<\/em><em> =\u7d42\u4e86\n<\/em><em>\u3055\u3089\u306b\u5916\u5074\n<\/em><em>=\u7d42\u308f\u308a<\/em>\u3002<\/code><\/pre>\n<p><\/p>\n<p>\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u306f\u30cd\u30b9\u30c8\u3057\u306a\u3044\u3002.<\/p>\n<p><b>\u9593\u9055\u30444\uff1a\u30e1\u30bd\u30c3\u30c9\u5185\u306eTODO\u306b\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u3092\u4f7f\u3046<\/b><\/p>\n<p>\u958b\u767a\u8005\u306f\u6642\u3005\u3053\u308c\u3092\u8a66\u3057\u3066\u3001\u69cb\u6587\u30a8\u30e9\u30fc\u3092\u898b\u3066\u3059\u3050\u306b\u5f8c\u6094\u3059\u308b\u3002.<\/p>\n<h2><b>7.Ruby\u3067\u306e\u30b3\u30e1\u30f3\u30c8\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff082025-2026\u30b9\u30bf\u30a4\u30eb\uff09<\/b><\/h2>\n<p><\/p>\n<ol class=\"wp-block-list\" start=\"1\"><p><\/p>\n<li>#\u3092\u8907\u6570\u672c\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u597d\u3080\u3002.<\/li>\n<p><\/p>\n<li>\u30a4\u30f3\u30e9\u30a4\u30f3\u306e\u8aac\u660e\u3001\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u306e\u6ce8\u8a18\u3001\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u30b9\u30c6\u30c3\u30d7\u306b\u306f#\u3092\u4f7f\u7528\u3059\u308b\u3002.<\/li>\n<p><\/p>\n<li>\u30e1\u30bd\u30c3\u30c9\/\u30af\u30e9\u30b9\/\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u4e0a\u306bRDoc\/YARD\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092#\u884c\u3092\u4f7f\u3063\u3066\u66f8\u304f\uff08=begin\u3067\u306f\u306a\u3044\uff09\u3002.<\/li>\n<p><\/p>\n<li>\u4e88\u7d04\uff1d\u958b\u59cb\uff0f\u7d42\u4e86\uff1a<br><ul class=\"wp-block-list\"><p><\/p>\n<li>\u30d5\u30a1\u30a4\u30eb\u30ec\u30d9\u30eb\u306e\u8457\u4f5c\u6a29\/\u6cd5\u7684\u901a\u77e5<\/li>\n<p><\/p>\n<li>\u30d5\u30a1\u30a4\u30eb\u958b\u59cb\u6642\u306e\u9577\u3044RDoc\u30de\u30fc\u30af\u30a2\u30c3\u30d7<\/li>\n<p><\/p>\n<li>\u4e00\u6642\u7684\u306a\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u30fb\u30c7\u30d0\u30c3\u30b0\u30fb\u30d6\u30ed\u30c3\u30af<\/li>\n<p><\/p>\n<\/ul>\n<p><\/p>\n<\/li>\n<p><\/p>\n<li>\u30b3\u30e1\u30f3\u30c8\u306f\u5e38\u306b\u6700\u65b0\u306e\u72b6\u614b\u306b\u4fdd\u3064\u3053\u3068\u3002\u53e4\u3044\u30b3\u30e1\u30f3\u30c8\u306f\u30b3\u30e1\u30f3\u30c8\u304c\u306a\u3044\u3088\u308a\u3082\u60aa\u3044\u3002.<\/li>\n<p><\/p>\n<li>TODO\/FIXME\/NOTE\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u6a19\u6e96\u5316\u3059\u308b\u305f\u3081\u306b\u3001Style\/CommentAnnotation\u306e\u3088\u3046\u306a\u30eb\u30fc\u30eb\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n<p><\/p>\n<\/ol>\n<p><\/p>\n<h2><b>8.\u30af\u30a4\u30c3\u30af\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9Ruby\u306e\u30b3\u30e1\u30f3\u30c8\u30b9\u30bf\u30a4\u30eb\u3092\u4e00\u6319\u306b\u7d39\u4ecb<\/b><\/h2>\n<p><\/p>\n<p>\u30eb\u30d3\u30fc<\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code><em>#\u5358\u4e00\u884c\u30b3\u30e1\u30f3\u30c8<\/em>&lt;\/em\n\n<em># \u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8<\/em>\u306b\u3088\u308b\u30de\u30eb\u30c1\u30e9\u30a4\u30f3\n<em># 2\u884c\u76ee<\/em>&lt;\/em\n<em># 3\u884c\u76ee<\/em>&lt;\/em\n\n<em>=\u958b\u59cb\n<\/em><em>\u771f\u306e\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u3002\n<\/em><em>\u591a\u304f\u306e\u884c\u306b\u307e\u305f\u304c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\n<\/em><em>\u5404\u884c\u306b#\u306f\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002\n<\/em><em>=\u7d42\u4e86<\/em>\u3002\n\n<em>=begin rdoc # \u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u30c4\u30fc\u30eb\u306e\u305f\u3081\u306e\u7279\u5225\u306a\u3082\u306e\u3067\u3059\u3002\n<\/em><em>=\u898b\u51fa\u3057\n&lt;\/em\n<em>\u8aac\u660e\u306e\u6bb5\u843d\u3002\n&lt;\/em\n<em>*\u30ea\u30b9\u30c8\u9805\u76ee\n<\/em><em>*\u5225\u306e\n<\/em><em>=\u7d42\u308f\u308a<\/em>\u3002\n\n\u30af\u30e9\u30b9\u306e\u4f8b\n  <em># \u3053\u308c\u306f\u8a31\u53ef\u3055\u308c\u3066\u3044\u307e\u3059\uff08\u30a4\u30f3\u30c7\u30f3\u30c8\u3055\u308c\u305f\u30a4\u30f3\u30e9\u30a4\u30f3\u30b3\u30e1\u30f3\u30c8\uff09<\/em>\u3002\n  \u30c7\u30e2\n    <em># \u3053\u3053\u3067\u306f\u3059\u3079\u3066#\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059<\/em>\u3002\n    <em># \u3053\u3053\u3067=begin\u306f\u3067\u304d\u307e\u305b\u3093<\/em>\u3002\n  \u7d42\u4e86\n\u7d42\u4e86<\/code><\/pre>\n<p><\/p>\n<h2><b>\u7d50\u8ad6<\/b><\/h2>\n<p>Ruby\u306e\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\u306b\u95a2\u3059\u308b\u8a71\u306f\u3001\u3042\u308b\u4e8b\u5b9f\u3092\u53d7\u3051\u5165\u308c\u3055\u3048\u3059\u308c\u3070\u7c21\u5358\u3060\u3002begin\/=end\u69cb\u6587\u306f\u5b58\u5728\u3057\u3001\u516c\u5f0f\u306e\u8a00\u8a9e\u4ed5\u69d8\u3067\u304d\u3061\u3093\u3068\u5b9a\u7fa9\u3055\u308c\u3066\u304a\u308a\u3001\u30cb\u30c3\u30c1\u306a\u4f7f\u3044\u65b9\u3082\u3042\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30e2\u30c0\u30f3\u306aRuby\u306e\u30b3\u30fc\u30c9\uff082025\u5e74\u4ee5\u964d\uff09\u3067\u306f\u3001\u30a4\u30f3\u30c7\u30f3\u30c8\u306e\u5236\u9650\u304c\u3042\u308b\u305f\u3081\u3001\u30e1\u30bd\u30c3\u30c9\u3084\u30af\u30e9\u30b9\u306e\u5185\u90e8\u3067\u898b\u304b\u3051\u308b\u3053\u3068\u306f\u307b\u3068\u3093\u3069\u3042\u308a\u307e\u305b\u3093\u3002\u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9\u3092\u8aad\u3093\u3060\u308a\u3001Ruby\u30b3\u30a2\u306b\u8ca2\u732e\u3057\u305f\u308a\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u751f\u6210\u30c4\u30fc\u30eb\u3092\u4f7f\u3063\u305f\u308a\u3059\u308b\u3068\u304d\u306b\u306f\u3001\u4e21\u65b9\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u3053\u3068\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u65e5\u3005\u306e\u4ed5\u4e8b\u3067\u306f#\u306b\u3053\u3060\u308f\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u672a\u6765\u306e\u81ea\u5206\uff08\u3068\u30c1\u30fc\u30e0\u30e1\u30a4\u30c8\uff09\u304c\u3042\u306a\u305f\u306b\u611f\u8b1d\u3059\u308b\u3067\u3057\u3087\u3046\u3002.<\/p>\n<p><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t  <div class=\"related-post slider\">\r\n        <div class=\"headline\">\u95a2\u9023\u8a18\u4e8b<\/div>\r\n    <div class=\"post-list owl-carousel\">\r\n\r\n            <div class=\"item\">\r\n            <div class=\"thumb post_thumb\">\r\n    <a  title=\"Building Agentic AI Applications with Ruby on Rails\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/building-agentic-ai-applications-with-ruby-on-rails\/?related_post_from=41339\">\r\n\r\n      <img decoding=\"async\" width=\"800\" height=\"300\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/05\/Building-Agentic-AI-Applications-with-Ruby-on-Rails.png\" class=\"attachment-full size-full wp-post-image\" alt=\"Agentic AI Applications with Ruby on Rails\" srcset=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/05\/Building-Agentic-AI-Applications-with-Ruby-on-Rails.png 800w, 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800px\" \/>\r\n\r\n    <\/a>\r\n  <\/div>\r\n\r\n  <a class=\"title post_title\"  title=\"Offliberty Ruby Gem\u3068\u306f\uff1f\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/what-is-offliberty-ruby-gem-and-how-it-works\/?related_post_from=41304\">\r\n        Offliberty Ruby Gem\u3068\u306f\uff1f  <\/a>\r\n\r\n        <\/div>\r\n              <div class=\"item\">\r\n            <div class=\"thumb post_thumb\">\r\n    <a  title=\"Rails\u306elink_to\u30e1\u30bd\u30c3\u30c9\uff1a\u4f8b\u306b\u3088\u308b\u5b8c\u5168\u30ac\u30a4\u30c9\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/rails-link_to-method-the-complete-guide-with-examples\/?related_post_from=41296\">\r\n\r\n      <img decoding=\"async\" width=\"800\" height=\"300\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/04\/Rails-link_to-Method-The-Complete-Guide-with-Examples.png\" class=\"attachment-full size-full wp-post-image\" alt=\"Rails 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href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/ruby-on-rails%e3%81%a7%e3%81%ae%e3%82%b5%e3%83%bc%e3%83%89%e3%83%91%e3%83%bc%e3%83%86%e3%82%a3api%e7%b5%b1%e5%90%88%e3%82%bd%e3%83%aa%e3%83%a5%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3\/?related_post_from=41264\">\r\n        Ruby on Rails\u306b\u304a\u3051\u308b\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3API\u7d71\u5408\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3  <\/a>\r\n\r\n        <\/div>\r\n      \r\n  <\/div>\r\n\r\n  <script>\r\n      <\/script>\r\n  <style>\r\n    .related-post {}\r\n\r\n    .related-post .post-list {\r\n      text-align: left;\r\n          }\r\n\r\n    .related-post .post-list .item {\r\n      margin: 10px;\r\n      padding: 10px;\r\n          }\r\n\r\n    .related-post .headline {\r\n      font-size: 14px !important;\r\n      color: #999999 !important;\r\n          }\r\n\r\n    .related-post .post-list .item .post_thumb {\r\n      max-height: 220px;\r\n      margin: 10px 0px;\r\n      padding: 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While single-line comments (starting with #) are ubiquitous and widely used, multiline (or block) comments have a dedicated syntax that many Ruby developers rarely touch in day-to-day work. This article dives deep into Ruby&#8217;s multiline comment system \u2014 how it works, why it&#8217;s designed this way, its quirks, best practices, common pitfalls, real-world use cases, and plenty of practical examples. We&#8217;ll cover both the official block comment syntax (=begin \/ =end) and the far more common idiom of using multiple single-line comments to achieve the same effect. By the &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/ruby-on-rails%e3%81%a7%e3%81%ae%e3%82%b5%e3%83%bc%e3%83%89%e3%83%91%e3%83%bc%e3%83%86%e3%82%a3api%e7%b5%b1%e5%90%88%e3%82%bd%e3%83%aa%e3%83%a5%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3\/\"> <span class=\"screen-reader-text\">Ruby on Rails\u306b\u304a\u3051\u308b\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3API\u7d71\u5408\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/span> \u3082\u3063\u3068\u8aad\u3080 \"<\/a><\/p>","protected":false},"author":5,"featured_media":41200,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1224],"tags":[],"class_list":["post-41195","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ruby Multiline Comments Explained with Examples - 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