{"id":1534,"date":"2025-03-24T08:50:29","date_gmt":"2025-03-23T23:50:29","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1534"},"modified":"2025-03-24T08:50:29","modified_gmt":"2025-03-23T23:50:29","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e8%a7%a3%e8%aa%ac%e3%80%91ruby%e5%88%9d%e5%bf%83%e8%80%85%e3%81%a7%e3%82%82%e3%82%8f%e3%81%8b%e3%82%8b%ef%bc%81case-when%e6%96%87%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1534","title":{"rendered":"\u3010\u5b8c\u5168\u89e3\u8aac\u3011Ruby\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\uff01case when\u6587\u306e\u4f7f\u3044\u65b9\u30685\u3064\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">case when\u6587\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u7406\u89e3\u3059\u308b\u6761\u4ef6\u5206\u5c90<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">case when\u6587\u306e\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9\u3068\u52d5\u4f5c\u539f\u7406<\/a>      <\/li>      <li>        <a href=\"#i-2\">if\u6587\u3068\u306e\u6bd4\u8f03\uff1a\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\uff1f<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">when\u7bc0\u3067\u4f7f\u3048\u308b\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u7a2e\u985e<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">case when\u6587\u306b\u3088\u308b\u53ef\u8aad\u6027\u306e\u5411\u4e0a\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">then\u8a18\u6cd5\u3092\u4f7f\u3063\u305f1\u884c\u3067\u306e\u7c21\u6f54\u306a\u8a18\u8ff0\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u6d3b\u7528\u3057\u305f\u6761\u4ef6\u5206\u5c90\u306e\u66f8\u304d\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">case when\u6587\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6700\u9069\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">if\u6587\u3068\u306e\u5b9f\u884c\u901f\u5ea6\u306e\u6bd4\u8f03\u691c\u8a3c<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u6761\u4ef6\u5206\u5c90\u306e\u9806\u5e8f\u306b\u3088\u308b\u51e6\u7406\u52b9\u7387\u306e\u9055\u3044<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-12\">case when\u6587\u306e\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">\u30b9\u30c6\u30fc\u30bf\u30b9\u7ba1\u7406\u3067\u306e\u6d3b\u7528\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-14\">\u30c7\u30fc\u30bf\u5909\u63db\u51e6\u7406\u3067\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3067\u306e\u4f7f\u3044\u65b9<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">case when\u6587\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u7406\u89e3\u3059\u308b\u6761\u4ef6\u5206\u5c90<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">case when\u6587\u306e\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9\u3068\u52d5\u4f5c\u539f\u7406<\/h3>\n\n\n\n<p>case when\u6587\u306f\u3001Ruby\u306b\u304a\u3051\u308b\u6761\u4ef6\u5206\u5c90\u306e\u5236\u5fa1\u69cb\u9020\u306e\u4e00\u3064\u3067\u3001\u8907\u6570\u306e\u6761\u4ef6\u306b\u5bfe\u3057\u3066\u51e6\u7406\u3092\u632f\u308a\u5206\u3051\u305f\u3044\u5834\u5408\u306b\u7279\u306b\u5a01\u529b\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">case \u5bfe\u8c61\u3068\u306a\u308b\u5024\nwhen \u6761\u4ef61\n  # \u6761\u4ef61\u304c\u771f\u306e\u5834\u5408\u306e\u51e6\u7406\nwhen \u6761\u4ef62\n  # \u6761\u4ef62\u304c\u771f\u306e\u5834\u5408\u306e\u51e6\u7406\nelse\n  # \u3069\u306e\u6761\u4ef6\u306b\u3082\u5f53\u3066\u306f\u307e\u3089\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\nend<\/pre>\n\n\n\n<p>\u5b9f\u969b\u306e\u4f7f\u7528\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u5e74\u9f62\u306b\u5fdc\u3058\u3066\u6599\u91d1\u3092\u6c7a\u5b9a\u3059\u308b\u4f8b\ndef calculate_fee(age)\n  case age\n  when 0..5\n    \"\u7121\u6599\"\n  when 6..12\n    \"\u5b50\u4f9b\u6599\u91d1: 500\u5186\"\n  when 13..18\n    \"\u5b66\u751f\u6599\u91d1: 800\u5186\"\n  else\n    \"\u5927\u4eba\u6599\u91d1: 1000\u5186\"\n  end\nend\n\nputs calculate_fee(10)  # =&gt; \"\u5b50\u4f9b\u6599\u91d1: 500\u5186\"<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">if\u6587\u3068\u306e\u6bd4\u8f03\uff1a\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\uff1f<\/h3>\n\n\n\n<p>case\u6587\u3068if\u6587\u306e\u4f7f\u3044\u5206\u3051\u306b\u3064\u3044\u3066\u3001\u4ee5\u4e0b\u306e\u89b3\u70b9\u304b\u3089\u6bd4\u8f03\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n<div id=\"id-51989663-20fc-4f51-811b-2751d1e37db6\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u89b3\u70b9<\/th><th>case when\u6587<\/th><th>if\u6587<\/th><\/tr><\/thead><tbody><tr><td>\u53ef\u8aad\u6027<\/td><td>\u8907\u6570\u6761\u4ef6\u306e\u4e26\u5217\u6bd4\u8f03\u306b\u512a\u308c\u308b<\/td><td>\u5358\u7d14\u306a\u6761\u4ef6\u5206\u5c90\u306b\u9069\u3057\u3066\u3044\u308b<\/td><\/tr><tr><td>\u8a18\u8ff0\u91cf<\/td><td>\u540c\u3058\u5024\u3068\u306e\u6bd4\u8f03\u3092\u7c21\u6f54\u306b\u66f8\u3051\u308b<\/td><td>\u6761\u4ef6\u304c\u5897\u3048\u308b\u3068\u5197\u9577\u306b\u306a\u308a\u304c\u3061<\/td><\/tr><tr><td>\u67d4\u8edf\u6027<\/td><td>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u304c\u4f7f\u3048\u308b<\/td><td>\u8907\u96d1\u306a\u6761\u4ef6\u5f0f\u3082\u66f8\u3051\u308b<\/td><\/tr><tr><td>\u4f7f\u7528\u30b7\u30fc\u30f3<\/td><td>\u5024\u306e\u4e00\u81f4\u5224\u5b9a\u3001\u7bc4\u56f2\u5224\u5b9a<\/td><td>\u771f\u507d\u5024\u5224\u5b9a\u3001\u8907\u5408\u6761\u4ef6<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">when\u7bc0\u3067\u4f7f\u3048\u308b\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u7a2e\u985e<\/h3>\n\n\n\n<p>case when\u6587\u3067\u306f\u3001\u69d8\u3005\u306a\u6bd4\u8f03\u65b9\u6cd5\u304c\u5229\u7528\u53ef\u80fd\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5024\u306e\u5b8c\u5168\u4e00\u81f4<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">case value\nwhen 1 then \"\u6570\u5024\u306e1\u3067\u3059\"\nwhen \"hello\" then \"\u6587\u5b57\u5217\u306ehello\u3067\u3059\"\nend<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u7bc4\u56f2\u6307\u5b9a<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">case score\nwhen 90..100 then \"\u512a\"\nwhen 80...90 then \"\u826f\"  # ...\u306f\u7d42\u7aef\u3092\u542b\u307e\u306a\u3044\nend<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u6b63\u898f\u8868\u73fe<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">case string\nwhen \/\\A\\d+\\z\/ then \"\u6570\u5b57\u306e\u307f\u306e\u6587\u5b57\u5217\u3067\u3059\"\nwhen \/\\A[A-Za-z]+\\z\/ then \"\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u306e\u307f\u306e\u6587\u5b57\u5217\u3067\u3059\"\nend<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u578b\u5224\u5b9a<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">case data\nwhen String then \"\u6587\u5b57\u5217\u3067\u3059\"\nwhen Integer then \"\u6574\u6570\u3067\u3059\"\nwhen Array then \"\u914d\u5217\u3067\u3059\"\nend<\/pre>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>\u8907\u6570\u6761\u4ef6<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">case value\nwhen 1, 2, 3 then \"1\u304b2\u304b3\u3067\u3059\"\nwhen \"a\", \"b\" then \"a\u304bb\u3067\u3059\"\nend<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001case when\u6587\u306f\u69d8\u3005\u306a\u6bd4\u8f03\u65b9\u6cd5\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u3092\u660e\u78ba\u306b\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u3001\u540c\u3058\u5024\u3068\u306e\u6bd4\u8f03\u3092\u8907\u6570\u56de\u884c\u3046\u5834\u5408\u3084\u3001\u5024\u306e\u7bc4\u56f2\u5224\u5b9a\u3092\u884c\u3046\u5834\u5408\u306b\u306f\u3001if\u6587\u3088\u308a\u3082\u53ef\u8aad\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">case when\u6587\u306b\u3088\u308b\u53ef\u8aad\u6027\u306e\u5411\u4e0a\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">then\u8a18\u6cd5\u3092\u4f7f\u3063\u305f1\u884c\u3067\u306e\u7c21\u6f54\u306a\u8a18\u8ff0\u65b9\u6cd5<\/h3>\n\n\n\n<p>then\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u6761\u4ef6\u5206\u5c90\u30921\u884c\u3067\u8868\u73fe\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u898b\u901a\u3057\u304c\u826f\u304f\u306a\u308a\u3001\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u5f93\u6765\u306e\u8a18\u6cd5\ndef convert_signal(color)\n  case color\n  when \"red\"\n    \"\u505c\u6b62\"\n  when \"yellow\"\n    \"\u6ce8\u610f\"\n  when \"green\"\n    \"\u9032\u884c\"\n  else\n    \"\u4e0d\u660e\"\n  end\nend\n\n# then\u8a18\u6cd5\u3092\u4f7f\u7528\u3057\u305f\u7c21\u6f54\u306a\u8a18\u8ff0\ndef convert_signal(color)\n  case color\n  when \"red\" then \"\u505c\u6b62\"\n  when \"yellow\" then \"\u6ce8\u610f\"\n  when \"green\" then \"\u9032\u884c\"\n  else \"\u4e0d\u660e\"\n  end\nend<\/pre>\n\n\n\n<p>then\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51e6\u7406\u304c1\u884c\u3067\u53ce\u307e\u308b\u5834\u5408\u306b\u306e\u307f\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u6761\u4ef6\u3068\u305d\u306e\u7d50\u679c\u304c\u660e\u78ba\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u51e6\u7406\u306f\u5f93\u6765\u306e\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u6d3b\u7528\u3057\u305f\u6761\u4ef6\u5206\u5c90\u306e\u66f8\u304d\u65b9<\/h3>\n\n\n\n<p>Ruby 2.7\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u3088\u308a\u67d4\u8edf\u306a\u6761\u4ef6\u5206\u5c90\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">def analyze_user_data(data)\n  case data\n  in { name:, age: 20.. } # 20\u6b73\u4ee5\u4e0a\u306e\u5834\u5408\n    \"#{name}\u3055\u3093\u306f\u6210\u4eba\u3067\u3059\"\n  in { name:, age: 0..19 } # 19\u6b73\u4ee5\u4e0b\u306e\u5834\u5408\n    \"#{name}\u3055\u3093\u306f\u672a\u6210\u5e74\u3067\u3059\"\n  in { name:, age: nil } # \u5e74\u9f62\u304c\u672a\u8a2d\u5b9a\u306e\u5834\u5408\n    \"#{name}\u3055\u3093\u306e\u5e74\u9f62\u306f\u4e0d\u660e\u3067\u3059\"\n  else\n    \"\u4e0d\u6b63\u306a\u30c7\u30fc\u30bf\u5f62\u5f0f\u3067\u3059\"\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nputs analyze_user_data({ name: \"\u7530\u4e2d\", age: 25 })  # =&gt; \"\u7530\u4e2d\u3055\u3093\u306f\u6210\u4eba\u3067\u3059\"\nputs analyze_user_data({ name: \"\u4f50\u85e4\", age: 17 })  # =&gt; \"\u4f50\u85e4\u3055\u3093\u306f\u672a\u6210\u5e74\u3067\u3059\"\nputs analyze_user_data({ name: \"\u5c71\u7530\", age: nil }) # =&gt; \"\u5c71\u7530\u3055\u3093\u306e\u5e74\u9f62\u306f\u4e0d\u660e\u3067\u3059\"<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u65b9<\/h3>\n\n\n\n<p>case when\u6587\u306e\u7d50\u679c\u3092\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u4e00\u90e8\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserStatus\n  def initialize(user)\n    @user = user\n  end\n\n  def determine_status\n    case @user[:activity_days]\n    when 0..7 then \"\u65b0\u898f\"\n    when 8..30 then \"\u4e00\u822c\"\n    when 31..90 then \"\u5e38\u9023\"\n    else \"VIP\"\n    end\n  end\n\n  def generate_message\n    case determine_status\n    when \"\u65b0\u898f\"\n      \"\u3088\u3046\u3053\u305d\uff01\u30b5\u30fc\u30d3\u30b9\u306e\u4f7f\u3044\u65b9\u3092\u3054\u6848\u5185\u3057\u307e\u3059\"\n    when \"\u4e00\u822c\"\n      \"\u3044\u3064\u3082\u3054\u5229\u7528\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\"\n    when \"\u5e38\u9023\"\n      \"\u3044\u3064\u3082\u3054\u611b\u9867\u3044\u305f\u3060\u304d\u3001\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\"\n    when \"VIP\"\n      \"\u7279\u5225\u306a\u30b5\u30fc\u30d3\u30b9\u3092\u3054\u7528\u610f\u3057\u3066\u304a\u308a\u307e\u3059\"\n    end\n  end\nend\n\n# \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u305f\u4f8b\nuser = { name: \"\u9234\u6728\", activity_days: 45 }\nmessage = UserStatus.new(user)\n  .generate_message\n  .upcase\n  .gsub(\/\uff01\/, \"!\")\nputs message  # =&gt; \"\u3044\u3064\u3082\u3054\u611b\u9867\u3044\u305f\u3060\u304d\u3001\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\"<\/pre>\n\n\n\n<p>\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u660e\u78ba\u306a\u547d\u540d<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5909\u6570\u540d\u3084\u30e1\u30bd\u30c3\u30c9\u540d\u306f\u610f\u56f3\u3092\u660e\u78ba\u306b\u8868\u73fe\u3059\u308b<\/li>\n\n\n\n<li>\u4e00\u8cab\u6027\u306e\u3042\u308b\u547d\u540d\u898f\u5247\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u9069\u5207\u306a\u69cb\u9020\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u95a2\u9023\u3059\u308b\u51e6\u7406\u3092\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u62bd\u51fa\u3059\u308b<\/li>\n\n\n\n<li>\u30af\u30e9\u30b9\u3084\u30e2\u30b8\u30e5\u30fc\u30eb\u3067\u8cac\u4efb\u3092\u9069\u5207\u306b\u5206\u5272\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30e1\u30f3\u30c8\u3068\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u96d1\u306a\u6761\u4ef6\u3084\u610f\u56f3\u304c\u5206\u304b\u308a\u306b\u304f\u3044\u5834\u5408\u306f\u30b3\u30e1\u30f3\u30c8\u3092\u8ffd\u52a0<\/li>\n\n\n\n<li>\u30e1\u30bd\u30c3\u30c9\u306e\u76ee\u7684\u3084\u5f15\u6570\u306e\u8aac\u660e\u3092\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3068\u3057\u3066\u6b8b\u3059<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001case when\u6587\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u3001then\u8a18\u6cd5\u3001\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3001\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306a\u3069\u306e\u6a5f\u80fd\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u7406\u89e3\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">case when\u6587\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6700\u9069\u5316<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">if\u6587\u3068\u306e\u5b9f\u884c\u901f\u5ea6\u306e\u6bd4\u8f03\u691c\u8a3c<\/h3>\n\n\n\n<p>case\u6587\u3068if\u6587\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6bd4\u8f03\u3059\u308b\u305f\u3081\u306b\u3001\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">require 'benchmark'\n\ndef case_method(value)\n  case value\n  when 1..10 then \"\u5c0f\u3055\u3044\u6570\"\n  when 11..100 then \"\u4e2d\u304f\u3089\u3044\u306e\u6570\"\n  when 101..1000 then \"\u5927\u304d\u3044\u6570\"\n  else \"\u7bc4\u56f2\u5916\"\n  end\nend\n\ndef if_method(value)\n  if value &gt;= 1 &amp;&amp; value &lt;= 10\n    \"\u5c0f\u3055\u3044\u6570\"\n  elsif value &gt;= 11 &amp;&amp; value &lt;= 100\n    \"\u4e2d\u304f\u3089\u3044\u306e\u6570\"\n  elsif value &gt;= 101 &amp;&amp; value &lt;= 1000\n    \"\u5927\u304d\u3044\u6570\"\n  else\n    \"\u7bc4\u56f2\u5916\"\n  end\nend\n\nn = 1000000\nBenchmark.bm do |x|\n  x.report(\"case:\") { n.times { case_method(50) } }\n  x.report(\"if:\") { n.times { if_method(50) } }\nend\n\n# \u5b9f\u884c\u7d50\u679c\u306e\u4f8b\uff1a\n#       user     system      total        real\n# case: 0.156250   0.000000   0.156250 (  0.156311)\n# if:   0.171875   0.000000   0.171875 (  0.171936)<\/pre>\n\n\n\n<p>\u4e3b\u306a\u767a\u898b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5358\u7d14\u306a\u6761\u4ef6\u5206\u5c90\u3067\u306f\u3001case\u6587\u3068if\u6587\u306e\u5b9f\u884c\u901f\u5ea6\u306b\u5927\u304d\u306a\u5dee\u306f\u306a\u3044<\/li>\n\n\n\n<li>\u591a\u304f\u306e\u6761\u4ef6\u3092\u6271\u3046\u5834\u5408\u3001case\u6587\u306e\u65b9\u304c\u82e5\u5e72\u9ad8\u901f<\/li>\n\n\n\n<li>\u5b9f\u884c\u901f\u5ea6\u306e\u5dee\u306f\u74b0\u5883\u3084\u30b1\u30fc\u30b9\u306b\u3088\u3063\u3066\u5909\u52d5\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u6761\u4ef6\u5206\u5c90\u306e\u9806\u5e8f\u306b\u3088\u308b\u51e6\u7406\u52b9\u7387\u306e\u9055\u3044<\/h3>\n\n\n\n<p>\u6761\u4ef6\u5206\u5c90\u306e\u9806\u5e8f\u306f\u3001\u5168\u4f53\u7684\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u975e\u52b9\u7387\u306a\u9806\u5e8f\u306e\u4f8b\ndef inefficient_order(status)\n  case status\n  when \"rare_case_1\" then \"\u51e6\u74061\"\n  when \"rare_case_2\" then \"\u51e6\u74062\"\n  when \"common_case\" then \"\u51e6\u74063\"  # \u6700\u3082\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u30b1\u30fc\u30b9\n  else \"\u30c7\u30d5\u30a9\u30eb\u30c8\u51e6\u7406\"\n  end\nend\n\n# \u6700\u9069\u5316\u3055\u308c\u305f\u9806\u5e8f\u306e\u4f8b\ndef optimized_order(status)\n  case status\n  when \"common_case\" then \"\u51e6\u74063\"  # \u6700\u3082\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u30b1\u30fc\u30b9\n  when \"rare_case_1\" then \"\u51e6\u74061\"\n  when \"rare_case_2\" then \"\u51e6\u74062\"\n  else \"\u30c7\u30d5\u30a9\u30eb\u30c8\u51e6\u7406\"\n  end\nend\n\n# \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u9055\u3044\u3092\u6e2c\u5b9a\nn = 1000000\nBenchmark.bm do |x|\n  x.report(\"\u975e\u52b9\u7387:\") { n.times { inefficient_order(\"common_case\") } }\n  x.report(\"\u6700\u9069\u5316:\") { n.times { optimized_order(\"common_case\") } }\nend<\/pre>\n\n\n\n<p>\u6700\u9069\u5316\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6700\u3082\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u6761\u4ef6\u3092\u5148\u982d\u306b\u914d\u7f6e<\/li>\n\n\n\n<li>\u767a\u751f\u983b\u5ea6\u306e\u4f4e\u3044\u6761\u4ef6\u3092\u5f8c\u308d\u306b\u914d\u7f6e<\/li>\n\n\n\n<li>\u30c7\u30d5\u30a9\u30eb\u30c8\u30b1\u30fc\u30b9\uff08else\uff09\u306f\u6700\u5f8c\u306b\u914d\u7f6e<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p>\u30e1\u30e2\u30ea\u52b9\u7387\u3092\u8003\u616e\u3057\u305fcase\u6587\u306e\u5b9f\u88c5\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u60aa\u3044\u5b9f\u88c5\u4f8b\ndef memory_inefficient(value)\n  result = case value\n  when String\n    # \u5927\u304d\u306a\u4e2d\u9593\u30c7\u30fc\u30bf\u3092\u751f\u6210\n    large_array = (1..10000).to_a\n    large_array.join\n  when Integer\n    # \u4e0d\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\n    (1..value).map(&amp;:to_s).join\n  else\n    \"\u305d\u306e\u4ed6\"\n  end\n  result\nend\n\n# \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u5b9f\u88c5\u4f8b\ndef memory_efficient(value)\n  case value\n  when String\n    # \u5fc5\u8981\u306a\u51e6\u7406\u306e\u307f\u3092\u5b9f\u884c\n    value.upcase\n  when Integer\n    # \u4e2d\u9593\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u751f\u6210\u3092\u6700\u5c0f\u9650\u306b\n    value.to_s\n  else\n    \"\u305d\u306e\u4ed6\"\n  end\nend<\/pre>\n\n\n\n<p>\u30e1\u30e2\u30ea\u6700\u9069\u5316\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u751f\u6210\u3092\u6700\u5c0f\u9650\u306b<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u307f\u3092\u751f\u6210<\/li>\n\n\n\n<li>\u5927\u304d\u306a\u4e2d\u9593\u30c7\u30fc\u30bf\u306e\u751f\u6210\u3092\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u4f7f\u3044\u7d42\u308f\u3063\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u901f\u3084\u304b\u306b\u89e3\u653e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6761\u4ef6\u5206\u5c90\u5185\u3067\u306e\u30e1\u30e2\u30ea\u4f7f\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5404\u5206\u5c90\u3067\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u30e1\u30e2\u30ea\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u5927\u304d\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306f\u5fc5\u8981\u306a\u90e8\u5206\u306e\u307f\u3092\u51e6\u7406<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u96c6\u4e2d\u578b\u306e\u51e6\u7406\u306f\u5c0f\u3055\u306a\u5358\u4f4d\u306b\u5206\u5272<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6d3b\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   # \u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4f7f\u7528\u3057\u305f\u6700\u9069\u5316\u4f8b\n   CACHED_RESULTS = {}\n\n   def cached_case_when(value)\n     CACHED_RESULTS ||= case value\n     when 1..100\n       expensive_calculation(value)\n     when String\n       complex_string_processing(value)\n     else\n       \"default\"\n     end\n   end<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u306acase when\u6587\u306e\u5b9f\u88c5\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u904e\u5ea6\u306a\u6700\u9069\u5316\u306f\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u640d\u306a\u3046\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u9069\u5207\u306a\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-12\">case when\u6587\u306e\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u30b9\u30c6\u30fc\u30bf\u30b9\u7ba1\u7406\u3067\u306e\u6d3b\u7528\u4f8b<\/h3>\n\n\n\n<p>Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u7ba1\u7406\u306f\u3001case when\u6587\u304c\u7279\u306b\u52b9\u679c\u3092\u767a\u63ee\u3059\u308b\u5834\u9762\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class Order\n  attr_reader :status, :paid_at, :shipped_at, :cancelled_at\n\n  def initialize(status)\n    @status = status\n  end\n\n  def status_details\n    case status\n    when \"pending\"\n      {\n        display_status: \"\u6ce8\u6587\u53d7\u4ed8\u4e2d\",\n        next_action: \"\u652f\u6255\u3044\u624b\u7d9a\u304d\u3092\u5b8c\u4e86\u3057\u3066\u304f\u3060\u3055\u3044\",\n        can_cancel: true,\n        badge_color: \"gray\"\n      }\n    when \"paid\"\n      {\n        display_status: \"\u652f\u6255\u3044\u6e08\u307f\",\n        next_action: \"\u5546\u54c1\u306e\u767a\u9001\u6e96\u5099\u4e2d\u3067\u3059\",\n        can_cancel: true,\n        badge_color: \"blue\"\n      }\n    when \"shipped\"\n      {\n        display_status: \"\u767a\u9001\u6e08\u307f\",\n        next_action: \"\u5546\u54c1\u306e\u5230\u7740\u3092\u304a\u5f85\u3061\u304f\u3060\u3055\u3044\",\n        can_cancel: false,\n        badge_color: \"green\"\n      }\n    when \"cancelled\"\n      {\n        display_status: \"\u30ad\u30e3\u30f3\u30bb\u30eb\u6e08\u307f\",\n        next_action: nil,\n        can_cancel: false,\n        badge_color: \"red\"\n      }\n    else\n      {\n        display_status: \"\u4e0d\u660e\",\n        next_action: \"\u30ab\u30b9\u30bf\u30de\u30fc\u30b5\u30dd\u30fc\u30c8\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044\",\n        can_cancel: false,\n        badge_color: \"gray\"\n      }\n    end\n  end\n\n  def can_transition_to?(new_status)\n    case [status, new_status]\n    when [\"pending\", \"paid\"], [\"pending\", \"cancelled\"]\n      true\n    when [\"paid\", \"shipped\"], [\"paid\", \"cancelled\"]\n      true\n    when [\"shipped\", \"delivered\"]\n      true\n    else\n      false\n    end\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u30c7\u30fc\u30bf\u5909\u63db\u51e6\u7406\u3067\u306e\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u5f62\u5f0f\u306e\u5909\u63db\u3084\u6b63\u898f\u5316\u306b\u304a\u3051\u308b\u6d3b\u7528\u4f8b\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DataConverter\n  def self.normalize_phone_number(input)\n    case input\n    when \/\\A(\\d{3})-(\\d{4})-(\\d{4})\\z\/\n      # \u4e00\u822c\u7684\u306a\u5f62\u5f0f\uff08\u4f8b\uff1a090-1234-5678\uff09\n      \"+81-#{$1}-#{$2}-#{$3}\"\n    when \/\\A\\+81[-\\s]?(\\d{3})[-\\s]?(\\d{4})[-\\s]?(\\d{4})\\z\/\n      # \u56fd\u969b\u5f62\u5f0f\uff08\u4f8b\uff1a+81-90-1234-5678\uff09\n      \"+81-#{$1}-#{$2}-#{$3}\"\n    when \/\\A(\\d{11})\\z\/\n      # \u6570\u5b57\u306e\u307f\uff08\u4f8b\uff1a09012345678\uff09\n      \"+81-#{$1[1,3]}-#{$1[4,4]}-#{$1[8,4]}\"\n    else\n      raise ArgumentError, \"\u4e0d\u6b63\u306a\u96fb\u8a71\u756a\u53f7\u5f62\u5f0f\u3067\u3059: #{input}\"\n    end\n  end\n\n  def self.format_data_size(bytes)\n    case bytes\n    when 0...1024\n      \"#{bytes}B\"\n    when 1024...1024**2\n      \"#{(bytes.to_f \/ 1024).round(1)}KB\"\n    when 1024**2...1024**3\n      \"#{(bytes.to_f \/ 1024**2).round(1)}MB\"\n    when 1024**3...1024**4\n      \"#{(bytes.to_f \/ 1024**3).round(1)}GB\"\n    else\n      \"#{(bytes.to_f \/ 1024**4).round(1)}TB\"\n    end\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3067\u306e\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>\u30a8\u30e9\u30fc\u51e6\u7406\u306b\u304a\u3051\u308bcase when\u6587\u306e\u6d3b\u7528\u4f8b\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class APIErrorHandler\n  def self.handle_error(error)\n    case error\n    when Net::HTTPServerError\n      {\n        status: :error,\n        code: 500,\n        message: \"\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\",\n        retry_after: 30,\n        should_retry: true\n      }\n    when Net::HTTPClientError\n      case error.code\n      when \"401\"\n        {\n          status: :error,\n          code: 401,\n          message: \"\u8a8d\u8a3c\u30a8\u30e9\u30fc\uff1a\u518d\u5ea6\u30ed\u30b0\u30a4\u30f3\u3057\u3066\u304f\u3060\u3055\u3044\",\n          retry_after: nil,\n          should_retry: false\n        }\n      when \"404\"\n        {\n          status: :error,\n          code: 404,\n          message: \"\u30ea\u30bd\u30fc\u30b9\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\",\n          retry_after: nil,\n          should_retry: false\n        }\n      when \"429\"\n        {\n          status: :error,\n          code: 429,\n          message: \"\u30ea\u30af\u30a8\u30b9\u30c8\u5236\u9650\u3092\u8d85\u904e\u3057\u307e\u3057\u305f\",\n          retry_after: error.response['Retry-After']&amp;.to_i || 60,\n          should_retry: true\n        }\n      end\n    when Timeout::Error\n      {\n        status: :error,\n        code: :timeout,\n        message: \"\u63a5\u7d9a\u304c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3057\u307e\u3057\u305f\",\n        retry_after: 5,\n        should_retry: true\n      }\n    else\n      {\n        status: :error,\n        code: :unknown,\n        message: \"\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\",\n        retry_after: nil,\n        should_retry: false\n      }\n    end\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nbegin\n  # API\u30ea\u30af\u30a8\u30b9\u30c8\u306a\u3069\u306e\u51e6\u7406\nrescue =&gt; e\n  error_info = APIErrorHandler.handle_error(e)\n  if error_info[:should_retry]\n    sleep error_info[:retry_after]\n    retry\n  else\n    logger.error(error_info[:message])\n    raise error_info[:message]\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306f\u3001case when\u6587\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u7406\u89e3\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3057\u3066\u3044\u307e\u3059\u3002\u7279\u306b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30c6\u30fc\u30bf\u30b9\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u72b6\u614b\u9077\u79fb\u306e\u5236\u5fa1<\/li>\n\n\n\n<li>\u72b6\u614b\u306b\u5fdc\u3058\u305f\u632f\u308b\u821e\u3044\u306e\u5b9a\u7fa9<\/li>\n\n\n\n<li>\u30e6\u30fc\u30b6\u30fc\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u7528\u306e\u30c7\u30fc\u30bf\u751f\u6210<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u5909\u63db<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5165\u529b\u30c7\u30fc\u30bf\u306e\u6b63\u898f\u5316<\/li>\n\n\n\n<li>\u5f62\u5f0f\u5909\u63db<\/li>\n\n\n\n<li>\u5358\u4f4d\u5909\u63db<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u30bf\u30a4\u30d7\u306e\u5206\u985e<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u751f\u6210<\/li>\n\n\n\n<li>\u30ea\u30c8\u30e9\u30a4\u6226\u7565\u306e\u6c7a\u5b9a<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u8ab2\u984c\u306b\u5bfe\u3059\u308b\u52b9\u679c\u7684\u306a\u89e3\u6c7a\u7b56\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":{"0":"post-1534","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-ruby","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1534","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1534"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1534\/revisions"}],"predecessor-version":[{"id":1535,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1534\/revisions\/1535"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1534"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}