{"id":39656,"date":"2025-07-03T06:28:04","date_gmt":"2025-07-03T06:28:04","guid":{"rendered":"https:\/\/www.railscarma.com\/?p=39656"},"modified":"2025-07-03T06:28:07","modified_gmt":"2025-07-03T06:28:07","slug":"%e3%83%ab%e3%83%93%e3%83%bc%e3%83%a9%e3%83%a0%e3%83%80%e5%85%a5%e9%96%80","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/%e3%83%ab%e3%83%93%e3%83%bc%e3%83%a9%e3%83%a0%e3%83%80%e5%85%a5%e9%96%80\/","title":{"rendered":"Ruby \u30e9\u30e0\u30c0\u3092\u7c21\u5358\u306b: \u521d\u5fc3\u8005\u30ac\u30a4\u30c9"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"39656\" class=\"elementor elementor-39656\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2e5903b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2e5903b\" 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-bbf43b7\" data-id=\"bbf43b7\" 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-c525814 elementor-widget elementor-widget-text-editor\" data-id=\"c525814\" 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>Ruby\u306f\u3001\u305d\u306e\u30a8\u30ec\u30ac\u30f3\u30c8\u3055\u3068\u67d4\u8edf\u6027\u3067\u77e5\u3089\u308c\u3001Ruby on Rails\u306e\u3088\u3046\u306a\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3092\u901a\u3057\u3066\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306aWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u52d5\u304b\u3059\u3001\u611b\u3055\u308c\u3066\u3044\u308b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3059\u3002\u3082\u3057\u3042\u306a\u305f\u304cRuby\u306e\u4e16\u754c\u306b\u98db\u3073\u8fbc\u3093\u3060\u3070\u304b\u308a\u306e\u521d\u5fc3\u8005\u306a\u3089\u3001\u3042\u308b\u3044\u306f\u3053\u308c\u304b\u3089Ruby\u306e\u4e16\u754c\u306b\u98db\u3073\u8fbc\u3082\u3046\u3068\u3057\u3066\u3044\u308b\u306e\u306a\u3089 <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\/\">Rails\u958b\u767a\u8005<\/a>\u30e9\u30e0\u30c0\u306e\u3088\u3046\u306a\u6a5f\u80fd\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u30af\u30ea\u30fc\u30f3\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u30e9\u30e0\u30c0\u306f\u6577\u5c45\u304c\u9ad8\u304f\u805e\u3053\u3048\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u52d5\u7684API\u306e\u69cb\u7bc9\u3001\u30e6\u30fc\u30b6\u30fc\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u4f5c\u6210\u3001\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u30ed\u30b8\u30c3\u30af\u306e\u5408\u7406\u5316\u306a\u3069\u3001\u30e9\u30e0\u30c0\u3092\u7c21\u5358\u306b\u8aac\u660e\u3057\u307e\u3059\u3002\u30e9\u30e0\u30c0\u3092\u4f7f\u3048\u3070\u3001Rails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u5f37\u5316\u3059\u308b\u30e2\u30b8\u30e5\u30fc\u30eb\u5f0f\u306e\u518d\u5229\u7528\u53ef\u80fd\u306a\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p><p>\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001Ruby\u306e\u30e9\u30e0\u30c0\u3092\u521d\u5fc3\u8005\u306b\u3084\u3055\u3057\u3044\u65b9\u6cd5\u3067\u5206\u89e3\u3057\u3001\u305d\u306e\u76ee\u7684\u3001\u69cb\u6587\u3001\u30d7\u30ed\u30c3\u30af\u3084\u30d6\u30ed\u30c3\u30af\u3068\u306e\u9055\u3044\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002Ruby on Rails\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u5408\u308f\u305b\u305f\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u3001\u30e9\u30e0\u30c0\u3092\u52b9\u679c\u7684\u306b\u4f7f\u3046\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u306f\u3001\u30e9\u30e0\u30c0\u3092\u958b\u767a\u4f5c\u696d\u306b\u7d44\u307f\u8fbc\u3093\u3067\u3001Rails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u3067\u9ad8\u54c1\u8cea\u306a\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p><h3><strong>Ruby\u306e\u30e9\u30e0\u30c0\u3068\u306f\uff1f<\/strong><\/h3><p>Ruby\u306b\u304a\u3051\u308b\u30e9\u30e0\u30c0\u3068\u306f\u3001\u81ea\u5df1\u5b8c\u7d50\u578b\u306e\u30b3\u30fc\u30c9\u30d6\u30ed\u30c3\u30af\u306e\u3053\u3068\u3067\u3001\u5909\u6570\u306b\u683c\u7d0d\u3057\u305f\u308a\u3001\u5f15\u6570\u3068\u3057\u3066\u6e21\u3057\u305f\u308a\u3001\u5f8c\u3067\u5b9f\u884c\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u518d\u5229\u7528\u306e\u305f\u3081\u306b\u30ed\u30b8\u30c3\u30af\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u305f\u3001\u30dd\u30fc\u30bf\u30d6\u30eb\u306a\u30df\u30cb\u95a2\u6570\u3068\u8003\u3048\u3066\u304f\u3060\u3055\u3044\u3002\u30e9\u30e0\u30c0\u306f <strong>\u30d7\u30ed\u30c3\u30af<\/strong> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u307e\u3059\u304c\u3001\u3088\u308a\u53b3\u3057\u3044\u30eb\u30fc\u30eb\u304c\u3042\u308b\u305f\u3081\u3001Rails\u958b\u767a\u306e\u7279\u5b9a\u306e\u30b7\u30ca\u30ea\u30aa\u306b\u6700\u9069\u3067\u3059\u3002<\/p><p>\u30e9\u30e0\u30c0\u306f\u5fc5\u8981\u306a\u3068\u304d\u306b\u5f79\u306b\u7acb\u3064\uff1a<\/p><ul><li><strong>\u518d\u5229\u7528\u53ef\u80fd\u306a\u30ed\u30b8\u30c3\u30af\uff1a<\/strong> \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u3067\u7e70\u308a\u8fd4\u3057\u4f7f\u3048\u308b\u3088\u3046\u306b\u30b3\u30fc\u30c9\u3092\u4fdd\u5b58\u3057\u3066\u304a\u304f\u3002<\/li><li><strong>\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306a\u632f\u308b\u821e\u3044\uff1a<\/strong> \u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u53ef\u80fd\u306a\u632f\u308b\u821e\u3044\u3092\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u3002<\/li><li><strong>\u30af\u30ea\u30fc\u30f3\u306a\u30b3\u30fc\u30c9\uff1a<\/strong> \u4fdd\u5b88\u6027\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3055\u308c\u305f\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3002<\/li><li><strong>Rails\u3068\u306e\u7d71\u5408\uff1a<\/strong> \u30b9\u30b3\u30fc\u30d7\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3001\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3068\u3044\u3063\u305fRails\u306e\u6a5f\u80fd\u3067\u30e9\u30e0\u30c0\u3092\u6d3b\u7528\u3059\u308b\u3002<\/li><\/ul><p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u304c\u9375\u3068\u306a\u308bRails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30e9\u30e0\u30c0\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u8005\u306f\u9ad8\u54c1\u8cea\u306e\u6a19\u6e96\u3092\u6e80\u305f\u3059\u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p><h3><strong>\u30e9\u30e0\u30c0 vs \u30d7\u30ed\u30c3\u30af vs \u30d6\u30ed\u30c3\u30af\uff1a\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/strong><\/h3><p>Rails\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u30e9\u30e0\u30c0\u3092\u52b9\u679c\u7684\u306b\u4f7f\u3046\u306b\u306f\u3001\u30e9\u30e0\u30c0\u3092Ruby\u306e\u4ed6\u306e\u547c\u3073\u51fa\u3057\u53ef\u80fd\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30c8\u3068\u533a\u5225\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a <strong>\u30d6\u30ed\u30c3\u30af<\/strong> \u305d\u3057\u3066 <strong>\u30d7\u30ed\u30c3\u30af\u30b9<\/strong>.\u3053\u3053\u306b\u660e\u78ba\u306a\u6bd4\u8f03\u304c\u3042\u308b\uff1a<\/p><ul><li><strong>\u30d6\u30ed\u30c3\u30af\uff1a<\/strong> \u30d6\u30ed\u30c3\u30af\u306f\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3055\u308c\u308b\u30b3\u30fc\u30c9\u306e\u584a\u3067\u3001\u901a\u5e38\u306f <code>\u3059\u308b...\u7d42\u4e86<\/code> \u307e\u305f\u306f\u4e2d\u304b\u3063\u3053 <code>{}<\/code>.\u30d6\u30ed\u30c3\u30af\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u72ec\u7acb\u3057\u3066\u4fdd\u5b58\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002Rails\u3067\u306f\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u53cd\u5fa9\u51e6\u7406\u3059\u308b\u3088\u3046\u306a\u30bf\u30b9\u30af\u3067\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002<\/li><\/ul><pre>\u30eb\u30d3\u30fc\n[1, 2, 3].each { |n| puts n * 2 }.\n# \u51fa\u529b\uff1a2, 4, 6<\/pre><ul><li><strong>\u30d7\u30ed\u30c3\u30af\u30b9<\/strong> \u3042 <code>\u30d7\u30ed\u30c3\u30af<\/code> \u306f\u30b3\u30fc\u30c9\u306e\u30d6\u30ed\u30c3\u30af\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3001\u4fdd\u5b58\u3068\u5f8c\u306e\u5b9f\u884c\u3092\u53ef\u80fd\u306b\u3059\u308b\u3002\u30d7\u30ed\u30c3\u30af\u306f <code>Proc.new<\/code> \u307e\u305f\u306f <code>\u30d7\u30ed\u30c3\u30af<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li><\/ul><pre>\u30eb\u30d3\u30fc\nmy_proc = Proc.new { |x| x * 2 }.\nputs my_proc.call(5) # \u51fa\u529b\uff1a10<\/pre><ul><li><strong>\u30e9\u30e0\u30c0\uff1a<\/strong> \u30e9\u30e0\u30c0\u306f <code>\u30d7\u30ed\u30c3\u30af<\/code> \u3088\u308a\u53b3\u683c\u306a\u884c\u52d5\u3067\u3092\u4f7f\u7528\u3057\u3066\u4f5c\u6210\u3055\u308c\u305f <code>\u30e9\u30e0\u30c0<\/code> \u30ad\u30fc\u30ef\u30fc\u30c9\u307e\u305f\u306f-&gt;\uff08stabby lambda\uff09\u69cb\u6587\u3067\u306f\u3001\u30e9\u30e0\u30c0\u306f\u5f15\u6570\u306e\u30c1\u30a7\u30c3\u30af\u3092\u5f37\u5236\u3057\u3001\u6b21\u306e\u3088\u3046\u306b\u51e6\u7406\u3057\u307e\u3059\u3002 <code>\u623b\u308b<\/code> \u306e\u767a\u8a00\u306f\u7570\u306a\u308b\u3002<\/li><\/ul><pre>\u30eb\u30d3\u30fc\nmy_lambda = -&gt;(x) { x * 2 }.\nputs my_lambda.call(5) # \u51fa\u529b\uff1a10<\/pre><h3><strong>\u30e9\u30e0\u30c0\u3068\u30d7\u30ed\u30c3\u30af\u306e\u4e3b\u306a\u9055\u3044<\/strong><\/h3><ul><li><strong>\u8b70\u8ad6\u30c1\u30a7\u30c3\u30af\uff1a<\/strong><ul><li>\u30e9\u30e0\u30c0\u306f\u6b63\u78ba\u306a\u5f15\u6570\u306e\u6570\u3092\u8981\u6c42\u3057 <code>\u5f15\u6570\u30a8\u30e9\u30fc<\/code> \u4e0d\u6b63\u78ba\u306a\u5834\u5408<\/li><li>\u30d7\u30ed\u30c3\u30af\u306f\u7518\u304f <code>\u30bc\u30ed<\/code> \u5f15\u6570\u304c\u8db3\u308a\u306a\u304b\u3063\u305f\u308a\u3001\u4f59\u8a08\u306a\u3082\u306e\u3092\u7121\u8996\u3057\u305f\u308a\u3059\u308b\u3002<\/li><\/ul><\/li><\/ul><pre>\u30eb\u30d3\u30fc\nmy_lambda = -&gt;(x) { x * 2 } \u3067\u3059\u3002\nmy_proc = Proc.new { |x| x * 2 }.\nputs my_lambda.call(5) # Works\uff1a10\nputs my_proc.call(5, 10) # \u52d5\u4f5c\uff1a10 (\u4f59\u5206\u306a\u5f15\u6570\u306f\u7121\u8996)\nmy_lambda.call # \u30a8\u30e9\u30fc\uff1a\u5f15\u6570\u30a8\u30e9\u30fc\nmy_proc.call # \u52d5\u4f5c: nil<\/pre><ul><li><strong>\u30ea\u30bf\u30fc\u30f3\u30d3\u30d8\u30a4\u30d3\u30a2\uff1a<\/strong><ul><li>\u3042 <code>\u623b\u308b<\/code> \u30e9\u30e0\u30c0\u306e\u4e2d\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u30e9\u30e0\u30c0\u3060\u3051\u3092\u7d42\u4e86\u3055\u305b\u3001\u305d\u308c\u3092\u56f2\u3080\u30e1\u30bd\u30c3\u30c9\u306f\u7d9a\u884c\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3002<\/li><li>\u3042 <code>\u623b\u308b<\/code> \u3053\u308c\u306f\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li><\/ul><\/li><\/ul><pre>\u30eb\u30d3\u30fc\ndef test_lambda\n    my_lambda = -&gt; { \"\u30e9\u30e0\u30c0\u5185\u90e8\" \u3092\u8fd4\u3059 }.\n    my_lambda.call\n    \"\u5916\u306e\u30e9\u30e0\u30c0\"\n\u7d42\u4e86\n\ndef test_proc\n    my_proc = Proc.new { return \"\u5185\u90e8 proc\" }.\n    my_proc.call\n    \"\u5916\u306e proc\"\n\u7d42\u4e86\n\nputs test_lambda # \u51fa\u529b\uff1a\"\u30e9\u30e0\u30c0\u5916\"\nputs test_proc # \u51fa\u529b\uff1a\"\u5185\u90e8 proc\"<\/pre><p>Rails\u958b\u767a\u8005\u306b\u3068\u3063\u3066\u30e9\u30e0\u30c0\u306f\u3001ActiveRecord\u306e\u30b9\u30b3\u30fc\u30d7\u3084\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u306e\u30ed\u30b8\u30c3\u30af\u306a\u3069\u3001\u5f15\u6570\u3092\u53b3\u5bc6\u306b\u5236\u5fa1\u3057\u3001\u623b\u308a\u5024\u306e\u52d5\u4f5c\u3092\u4e88\u6e2c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306b\u6700\u9069\u3067\u3059\u3002<\/p><h3><strong>\u30e9\u30e0\u30c0\u306e\u4f5c\u6210\u3068\u4f7f\u7528<\/strong><\/h3><p>Ruby\u306b\u306f\u30e9\u30e0\u30c0\u3092\u4f5c\u6210\u3059\u308b2\u3064\u306e\u65b9\u6cd5\u304c\u3042\u308a\u3001\u3069\u3061\u3089\u3082Rails\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\uff1a<\/p><ul><li><strong>\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002 <code>\u30e9\u30e0\u30c0<\/code> \u30ad\u30fc\u30ef\u30fc\u30c9<\/strong><\/li><\/ul><pre>\u30eb\u30d3\u30fc\ndouble = lambda { |x| x * 2 }.\nputs double.call(4) # \u51fa\u529b\uff1a8<\/pre><ul><li><strong>\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002 <code>-&gt;<\/code> \u69cb\u6587<\/strong> (\u30b9\u30bf\u30d3\u30fc\u30fb\u30e9\u30e0\u30c0\uff09\uff1a<\/li><\/ul><pre>\u30eb\u30d3\u30fc\ntriple = -&gt;(x) { x * 3 }.\nputs triple.call(4) # \u51fa\u529b\uff1a12<\/pre><p>\u306b\u3064\u3044\u3066 <code>-&gt;<\/code> \u69cb\u6587\u306f\u7c21\u6f54\u3067\u3001\u30af\u30ea\u30fc\u30f3\u3067\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306e\u305f\u3081\u306b\u6700\u65b0\u306eRuby\u3068Rails\u306e\u898f\u7d04\u306b\u6cbf\u3063\u3066\u3044\u307e\u3059\u3002<\/p><h3><strong>\u30e9\u30e0\u30c0\u306e\u547c\u3073\u51fa\u3057<\/strong><\/h3><p>\u30e9\u30e0\u30c0\u3092\u5b9f\u884c\u3059\u308b\u306b\u306f<\/p><ul><li><code>\u30b3\u30fc\u30eb<\/code>:\u6a19\u6e96\u7684\u306a\u65b9\u6cd5\u3002<\/li><li><code>[]<\/code>:\u30e9\u30e0\u30c0\u3092\u89d2\u62ec\u5f27\u4ed8\u304d\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u3088\u3046\u306b\u6271\u3046\u3002<\/li><li><code>.()<\/code>:\u306e\u7565\u8a9e\u3002 <code>\u30b3\u30fc\u30eb<\/code>.<\/li><\/ul><pre>\u30eb\u30d3\u30fc\nmy_lambda = -&gt;(x) { x * 2 }.\nputs my_lambda.call(5) # \u51fa\u529b\uff1a10\nputs my_lambda[5] # \u51fa\u529b\uff1a10\nputs my_lambda.(5) # \u51fa\u529b\uff1a10<\/pre><h3><strong>Rails\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3051\u308b\u30e9\u30e0\u30c0\uff1a\u5b9f\u8df5\u4f8b<\/strong><\/h3><p>Ruby on Rails\u3067\u306f\u3001\u30e9\u30e0\u30c0\u306f\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002ActiveRecord\u306e\u30b9\u30b3\u30fc\u30d7\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3001\u30ab\u30b9\u30bf\u30e0\u30ed\u30b8\u30c3\u30af\u3067\u3088\u304f\u4f7f\u308f\u308c\u3001\u30b3\u30fc\u30c9\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3068\u4fdd\u5b88\u6027\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002Rails\u958b\u767a\u306b\u95a2\u9023\u3059\u308b\u5b9f\u7528\u7684\u306a\u4f8b\u3092\u63a2\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p><h5><strong>\u4f8b 1\uff1a\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30b9\u30b3\u30fc\u30d7\u306b\u3088\u308b\u30c7\u30fc\u30bf\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/strong><\/h5><p>Rails\u306e\u30b9\u30b3\u30fc\u30d7\u306f\u518d\u5229\u7528\u53ef\u80fd\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u3092\u53ef\u80fd\u306b\u3057\u3001\u30e9\u30e0\u30c0\u306f\u52d5\u7684\u306a\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306b\u6700\u9069\u3067\u3059\u3002\u30d6\u30ed\u30b0\u306e\u6295\u7a3f\u3092\u7ba1\u7406\u3059\u308bRails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u3063\u3066\u3044\u3066\u3001\u6700\u5c0f\u30b3\u30e1\u30f3\u30c8\u6570\u3067\u6295\u7a3f\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u30b9\u30b3\u30fc\u30d7\u304c\u5fc5\u8981\u3060\u3068\u3057\u307e\u3059\u3002<\/p><pre>\u30eb\u30d3\u30fc\n# app\/models\/post.rb\nclass Post (min_comments) { where(\"comments_count &gt;= ?\", min_comments) }.\n\u7d42\u4e86<\/pre><p>\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3067\u306f\u3001\u3053\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u308b\uff1a<\/p><pre>\u30eb\u30d3\u30fc\n# app\/controllers\/posts_controller.rb\nclass PostsController &lt; ApplicationController\n    def index\n        @popular_posts = Post.popular(5) # \u30b3\u30e1\u30f3\u30c8\u304c5\u4ef6\u4ee5\u4e0a\u306e\u6295\u7a3f\n    end\nend<\/pre><p>\u30e9\u30e0\u30c0 <code>-&gt;(min_comments) { ...}<\/code> \u306f\u30b9\u30b3\u30fc\u30d7\u3092\u67d4\u8edf\u304b\u3064\u518d\u5229\u7528\u53ef\u80fd\u306b\u3057\u3001Rails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30b3\u30fc\u30c9\u306e\u91cd\u8907\u3092\u6e1b\u3089\u3057\u307e\u3059\u3002<\/p><h5><strong>\u4f8b2\uff1a\u81ea\u52d5\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af<\/strong><\/h5><p>\u30e9\u30e0\u30c0\u306f\u3001Rails\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3067\u6761\u4ef6\u4ed8\u304d\u30ed\u30b8\u30c3\u30af\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3059\u308b\u306e\u306b\u7406\u60f3\u7684\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30a2\u30ab\u30a6\u30f3\u30c8\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u304c \"active\" \u306b\u5909\u308f\u3063\u305f\u3068\u304d\u306b\u30e6\u30fc\u30b6\u30fc\u306b\u901a\u77e5\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3057\u3066\u3044\u308b\u3068\u3057\u307e\u3059\u3002<\/p><pre>\u30eb\u30d3\u30fc\n# app\/models\/user.rb\n\u30af\u30e9\u30b9 User  { saved_change_to_status? &amp;&amp; status == \"active\" }.\n\n    private\n\n    def send_activation_notification\n        NotificationService.send_welcome_email(self)\n    \u7d42\u4e86\n\u7d42\u4e86<\/pre><p>\u30e9\u30e0\u30c0 <code>-&gt; &amp;&amp; status == \"active\" } } { saved_change_to_status?<\/code> \u306f\u3001\u30b9\u30c6\u30fc\u30bf\u30b9\u304c \"active \"\u306b\u5909\u66f4\u3055\u308c\u305f\u3068\u304d\u306e\u307f\u901a\u77e5\u304c\u30c8\u30ea\u30ac\u30fc\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u3001\u30ed\u30b8\u30c3\u30af\u3092\u6b63\u78ba\u3067\u4fdd\u5b88\u3057\u3084\u3059\u304f\u3057\u307e\u3059\u3002<\/p><h5><strong>\u4f8b 3: \u30ec\u30dd\u30fc\u30c8\u306e\u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8<\/strong><\/h5><p>\u30e9\u30e0\u30c0\u306fRails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8\u30ed\u30b8\u30c3\u30af\u306b\u6700\u9069\u3067\u3059\u3002\u4fa1\u683c\u3068\u9867\u5ba2\u306e\u8a55\u4fa1\u306b\u57fa\u3065\u3044\u3066\u91cd\u307f\u4ed8\u3051\u3055\u308c\u305f\u30b9\u30b3\u30a2\u3067\u5546\u54c1\u3092\u30bd\u30fc\u30c8\u3059\u308b\u6a5f\u80fd\u3092\u958b\u767a\u3057\u3066\u3044\u308b\u3068\u3057\u307e\u3057\u3087\u3046\u3002<\/p><pre>\u30eb\u30d3\u30fc\n# app\/controllers\/products_controller.rb\nclass ProductsController (product) { product.price * 0.3 + product.average_rating * 0.7 }.\n    \u7d42\u4e86\n\u7d42\u4e86<\/pre><p>\u30e9\u30e0\u30c0 <code>\u52a0\u91cd\u30b9\u30b3\u30a2<\/code> \u5404\u88fd\u54c1\u306e\u30b9\u30b3\u30a2\u3092\u8a08\u7b97\u3057 <code>\u30bd\u30fc\u30c8<\/code> \u3092\u4f7f\u7528\u3057\u3066\u7d50\u679c\u3092\u4e26\u3079\u66ff\u3048\u3001\u30bd\u30fc\u30c8\u30fb\u30ed\u30b8\u30c3\u30af\u3092\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3057\u3066\u518d\u5229\u7528\u53ef\u80fd\u306b\u3059\u308b\u3002<\/p><h3><strong>\u30e9\u30e0\u30c0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong><\/h3><p>lambdas\u304cRails\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u78ba\u5b9f\u306b\u5f37\u5316\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\uff1a<\/p><ul><li><strong>\u53b3\u5bc6\u306a\u5236\u5fa1\u306b\u306f\u30e9\u30e0\u30c0\u3092\u4f7f\u304a\u3046\uff1a<\/strong> \u7279\u306bRails\u306e\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3001\u30e2\u30c7\u30eb\u3001\u30b5\u30fc\u30d3\u30b9\u306b\u304a\u3044\u3066\u3001\u53b3\u5bc6\u306a\u5f15\u6570\u30c1\u30a7\u30c3\u30af\u3084\u4e88\u6e2c\u53ef\u80fd\u306a\u623b\u308a\u5024\u306e\u52d5\u4f5c\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u30e9\u30e0\u30c0\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/li><li><strong>\u30e9\u30e0\u30c0\u3092\u96c6\u4e2d\u3055\u305b\u308b<\/strong> \u30e9\u30e0\u30c0\u306f\u3001\u5c0f\u3055\u306a\u7279\u5b9a\u306e\u30ed\u30b8\u30c3\u30af\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u8907\u96d1\u306a\u30ed\u30b8\u30c3\u30af\u306e\u5834\u5408\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u3084\u30b5\u30fc\u30d3\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u62bd\u51fa\u3057\u3066\u53ef\u8aad\u6027\u3092\u4fdd\u3064\u3053\u3068\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li><li><strong>\u8aac\u660e\u7684\u306a\u540d\u524d\u3092\u4f7f\u3046\uff1a<\/strong> \u30e9\u30e0\u30c0\u5909\u6570\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u660e\u78ba\u306b\u540d\u524d\u3092\u4ed8\u3051\u308b\u3002 <code>\u8a08\u7b97\u30b9\u30b3\u30a2<\/code> \u307e\u305f\u306f <code>\u30d5\u30a3\u30eb\u30bf\u30fc_\u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc<\/code>\u3042\u306a\u305f\u306e\u30b3\u30fc\u30c9\u3092\u30bb\u30eb\u30d5\u30fb\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5316\u3059\u308b\u3002<\/li><li><strong>\u30b9\u30b3\u30fc\u30d7\u3067\u30e9\u30e0\u30c0\u3092\u6d3b\u7528\u3059\u308b\uff1a<\/strong> \u52d5\u7684\u306aActiveRecord\u30b9\u30b3\u30fc\u30d7\u306b\u30e9\u30e0\u30c0\u3092\u4f7f\u7528\u3057\u3066\u3001\u30af\u30a8\u30ea\u3092DRY\u304b\u3064\u518d\u5229\u7528\u53ef\u80fd\u306b\u4fdd\u3061\u307e\u3059\u3002<\/li><li><strong>\u30e9\u30e0\u30c0\u3092\u5fb9\u5e95\u7684\u306b\u30c6\u30b9\u30c8\u3059\u308b<\/strong> \u30e9\u30e0\u30c0\u304c\u671f\u5f85\u901a\u308a\u306b\u52d5\u4f5c\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3092\u66f8\u304f\u3002Rails\u3067\u306f\u3001RSpec\uff1a<\/li><\/ul><pre>\u30eb\u30d3\u30fc\nRSpec.describe \"weighted_score lambda\" do\n    let(:product) { double(price: 100, average_rating: 4) }.\n    let(:weighted_score) { -&gt;(p) { p.price * 0.3 + p.average_rating * 0.7 } }.}\n\n    \u6b63\u3057\u3044\u30b9\u30b3\u30a2\u3092\u8a08\u7b97\u3059\u308b\" do\n        expect(weighted_score.call(product)).to eq(32.8) # 100 * 0.3 + 4 * 0.7\n    \u7d42\u4e86\n\u7d42\u4e86<\/pre><ul><li><strong>\u30e9\u30e0\u30c0\u306e\u4f7f\u7528\u91cf\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u3068\u308b\uff1a<\/strong> \u30e1\u30bd\u30c3\u30c9\u3084\u30d6\u30ed\u30c3\u30af\u306e\u3088\u3046\u306a\u5358\u7d14\u306a\u89e3\u6c7a\u7b56\u3067\u5341\u5206\u306a\u5834\u5408\u306b\u30e9\u30e0\u30c0\u3092\u4f7f\u3044\u3059\u304e\u306a\u3044\u3088\u3046\u306b\u3057\u3001\u30b3\u30fc\u30c9\u304c\u660e\u78ba\u3067\u4fdd\u5b88\u3057\u3084\u3059\u3044\u72b6\u614b\u3092\u7dad\u6301\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3002<\/li><\/ul><h3><strong>\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3068\u305d\u306e\u907f\u3051\u65b9<\/strong><\/h3><p>Ruby\u3067\u30e9\u30e0\u30c0\u3092\u6271\u3046\u3068\u304d\u3001\u521d\u5fc3\u8005\u306f\u3044\u304f\u3064\u304b\u306e\u554f\u984c\u306b\u76f4\u9762\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3053\u3053\u3067\u306f\u3001\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u3092\u907f\u3051\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p><ul><li><strong>\u8b70\u8ad6\u306e\u4e0d\u4e00\u81f4\uff1a<\/strong> \u30e9\u30e0\u30c0\u306f\u53b3\u683c\u306a\u5f15\u6570\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046\u306e\u3067\u3001\u5e38\u306b\u6b63\u3057\u3044\u6570\u306e\u5f15\u6570\u3092\u6e21\u3059\u3053\u3068\u3002\u3088\u308a\u67d4\u8edf\u6027\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f <code>\u30d7\u30ed\u30c3\u30af<\/code> \u305d\u306e\u4ee3\u308f\u308a\u3060\u3002<\/li><li><strong>\u4e88\u671f\u305b\u306c\u30ea\u30bf\u30fc\u30f3\u884c\u52d5\uff1a<\/strong> \u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3060\u3002 <code>\u623b\u308b<\/code> \u306e\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8 <code>\u30d7\u30ed\u30c3\u30af\u30b9<\/code>\u30e1\u30bd\u30c3\u30c9\u5168\u4f53\u3092\u7d42\u4e86\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u304b\u3089\u3067\u3059\u3002\u7279\u306b\u8907\u96d1\u306aRails\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3067\u306f\u3001\u3088\u308a\u4e88\u6e2c\u53ef\u80fd\u306a\u52d5\u4f5c\u3092\u3055\u305b\u308b\u305f\u3081\u306b\u30e9\u30e0\u30c0\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li><li><strong>\u30e9\u30e0\u30c0\u3092\u8907\u96d1\u306b\u3057\u3059\u304e\uff1a<\/strong> \u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u4fdd\u3064\u305f\u3081\u3001\u30e9\u30e0\u30c0\u306f\u30b7\u30f3\u30d7\u30eb\u306b\u4fdd\u3061\u307e\u3057\u3087\u3046\u3002\u8907\u96d1\u306a\u30ed\u30b8\u30c3\u30af\u3067\u306f\u3001\u69cb\u9020\u5316\u3055\u308c\u305fRails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u30b5\u30fc\u30d3\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u30d8\u30eb\u30d1\u30fc\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/li><li><strong>\u30b9\u30b3\u30fc\u30d7\u3067\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\uff1a<\/strong> Rails\u306e\u30b9\u30b3\u30fc\u30d7\u3067\u30e9\u30e0\u30c0\u3092\u4f7f\u3046\u3068\u304d\u306f\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u307e\u307e\u306b\u3057\u307e\u3057\u3087\u3046\u3002\u8907\u96d1\u306a\u30e9\u30e0\u30c0\u30d9\u30fc\u30b9\u306e\u30b9\u30b3\u30fc\u30d7\u306f\u3001\u975e\u52b9\u7387\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u9069\u5207\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3057\u3066\u6700\u9069\u5316\u3057\u3001\u30b9\u30b3\u30fc\u30d7\u306b\u30ed\u30b8\u30c3\u30af\u3092\u8a70\u3081\u8fbc\u307f\u3059\u304e\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/li><\/ul><h3><strong>\u9ad8\u5ea6\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u30e9\u30e0\u30c0<\/strong><\/h3><p>Ruby\u306f\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30d1\u30bf\u30fc\u30f3\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001\u30e9\u30e0\u30c0\u306f\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3068\u3063\u3066\u91cd\u8981\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u9ad8\u5ea6\u306aRails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30e9\u30e0\u30c0\u3092\u6b21\u306e\u3088\u3046\u306b\u4f7f\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\uff1a<\/p><ul><li><strong>\u30ab\u30ec\u30fc\u3092\u4f5c\u308b\uff1a<\/strong> \u90e8\u5206\u5f15\u6570\u9069\u7528\u306e\u305f\u3081\u306b\u4ed6\u306e\u30e9\u30e0\u30c0\u3092\u8fd4\u3059\u30e9\u30e0\u30c0\u3092\u4f5c\u6210\u3059\u308b\u3002<\/li><\/ul><pre>\u30eb\u30d3\u30fc<br \/>\u52a0\u7b97\u5668 = -&gt;(x) { -&gt;(y) { x + y } }.}<br \/>add_five = adder.call(5)<br \/>puts add_five.call(3) # \u51fa\u529b\uff1a8<\/pre><ul><li><strong>\u30e1\u30e2\u5316\uff1a<\/strong> \u30e9\u30e0\u30c0\u3092\u4f7f\u3063\u3066\u9ad8\u4fa1\u306a\u8a08\u7b97\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4e0a\u3052\u308b\u3002<\/li><\/ul><pre>\u30eb\u30d3\u30fc<br \/>expensive_calc = -&gt;(n) do<br \/>    \u30ad\u30e3\u30c3\u30b7\u30e5<br \/>    cache[n] ||= (puts \"Calculating...\"; n * n)<br \/>\u7d42\u308f\u308a<br \/>puts expensive_calc.call(5) # \u51fa\u529b\uff1a\u8a08\u7b97\u4e2d...25<br \/>puts expensive_calc.call(5) # \u51fa\u529b\uff1a25 (\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u7d50\u679c\u3092\u4f7f\u7528)<\/pre><p>\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u306f\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u591a\u3044Rails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u304c\u3001\u30b3\u30fc\u30c9\u306e\u660e\u5feb\u3055\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u63a7\u3048\u3081\u306b\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p><h2><strong>\u7d50\u8ad6<\/strong><\/h2><p>\u30e9\u30e0\u30c0\u306f\u4f9d\u7136\u3068\u3057\u3066Ruby\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u3067\u3042\u308a\u3001Rails\u958b\u767a\u8005\u306b\u7d76\u5927\u306a\u67d4\u8edf\u6027\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u30e9\u30e0\u30c0\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001Rails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u3001\u3088\u308a\u30af\u30ea\u30fc\u30f3\u3067\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u52d5\u7684\u30b9\u30b3\u30fc\u30d7\u306e\u5b9a\u7fa9\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306b\u3088\u308b\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u306e\u81ea\u52d5\u5316\u3001\u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u88c5\u306a\u3069\u3001\u30e9\u30e0\u30c0\u306f\u518d\u5229\u7528\u53ef\u80fd\u3067\u30a8\u30ec\u30ac\u30f3\u30c8\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p><p>\u30b9\u30b3\u30fc\u30d7\u3084\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306e\u3088\u3046\u306a\u30b7\u30f3\u30d7\u30eb\u306aRails\u30bf\u30b9\u30af\u306b\u30e9\u30e0\u30c0\u3092\u7d44\u307f\u8fbc\u3080\u3053\u3068\u304b\u3089\u59cb\u3081\u3001\u81ea\u4fe1\u304c\u3064\u3044\u3066\u304d\u305f\u3089currying\u3084\u30e1\u30e2\u5316\u306e\u3088\u3046\u306a\u9ad8\u5ea6\u306a\u30d1\u30bf\u30fc\u30f3\u3092\u63a2\u6c42\u3057\u307e\u3057\u3087\u3046\u3002\u3053\u3053\u3067\u8aac\u660e\u3059\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3001\u3064\u307e\u308a\u30e9\u30e0\u30c0\u306b\u7126\u70b9\u3092\u7d5e\u308b\u3053\u3068\u3001\u30e9\u30e0\u30c0\u3092\u5fb9\u5e95\u7684\u306b\u30c6\u30b9\u30c8\u3059\u308b\u3053\u3068\u3001\u3088\u308a\u30b7\u30f3\u30d7\u30eb\u306a\u4ee3\u66ff\u624b\u6bb5\u3068\u306e\u4f7f\u7528\u30d0\u30e9\u30f3\u30b9\u3092\u3068\u308b\u3053\u3068\u306b\u5f93\u3048\u3070\u3001\u3042\u306a\u305f\u306e\u30b3\u30fc\u30c9\u304c\u5805\u7262\u3067\u8aad\u307f\u3084\u3059\u304f\u306a\u308b\u306f\u305a\u3067\u3059\u3002\u7df4\u7fd2\u3092\u91cd\u306d\u308b\u3053\u3068\u3067\u3001\u30e9\u30e0\u30c0\u306f\u3042\u306a\u305f\u306e Ruby on Rails \u30c4\u30fc\u30eb\u30ad\u30c3\u30c8\u306b\u6b20\u304b\u305b\u306a\u3044\u30c4\u30fc\u30eb\u3068\u306a\u308a\u3001\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u3067\u9ad8\u54c1\u8cea\u306a Web \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u7c21\u5358\u306b\u69cb\u7bc9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u672c\u3067 <a href=\"https:\/\/www.railscarma.com\/ja\/\">\u30ec\u30fc\u30eb\u30ab\u30fc\u30de<\/a>\u3092\u30ea\u30fc\u30c9\u3057\u3066\u3044\u308b\u3002 <a href=\"https:\/\/www.railscarma.com\/ja\/\">Ruby on Rails\u958b\u767a\u4f1a\u793e<\/a>\u79c1\u305f\u3061\u306f\u3001Ruby \u3068 Rails \u306e\u30a8\u30ec\u30ac\u30f3\u30b9\u3068\u30d1\u30ef\u30fc\u3092\u30d9\u30fc\u30b9\u306b\u69cb\u7bc9\u3055\u308c\u305f\u6700\u5148\u7aef\u306e Web \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3001\u30d3\u30b8\u30cd\u30b9\u306b\u529b\u3092\u4e0e\u3048\u307e\u3059\u3002\u79c1\u305f\u3061\u306e\u30c1\u30fc\u30e0\u306b\u53c2\u52a0\u3059\u308b\u958b\u767a\u8005\u3068\u3057\u3066\u3001\u307e\u305f\u306f\u30b9\u30ad\u30eb\u3092\u78e8\u304f\u958b\u767a\u8005\u3068\u3057\u3066\u3001\u30e9\u30e0\u30c0\u306a\u3069\u306eRuby\u306e\u9ad8\u5ea6\u306a\u6a5f\u80fd\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u3053\u3068\u3067\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u52b9\u7387\u6027\u3068\u5275\u9020\u6027\u3092\u65b0\u305f\u306a\u30ec\u30d9\u30eb\u306b\u5f15\u304d\u4e0a\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/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            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alt=\"\u30eb\u30d3\u30fc\u6b63\u898f\u8868\u73fe\u30de\u30c3\u30c1\" srcset=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/04\/Ruby-Regex-Match-Guide-with-Examples.png 800w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/04\/Ruby-Regex-Match-Guide-with-Examples-300x113.png 300w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/04\/Ruby-Regex-Match-Guide-with-Examples-768x288.png 768w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/04\/Ruby-Regex-Match-Guide-with-Examples-18x7.png 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\r\n\r\n    <\/a>\r\n  <\/div>\r\n\r\n  <a class=\"title post_title\"  title=\"Ruby\u6b63\u898f\u8868\u73fe\u30de\u30c3\u30c1\u30ac\u30a4\u30c9\uff082026\uff09\u4f8b\u4ed8\u304d\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/ruby-regex-match-guide-with-examples\/?related_post_from=41249\">\r\n        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