{"id":1525,"date":"2025-03-24T08:50:30","date_gmt":"2025-03-23T23:50:30","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1525"},"modified":"2025-03-24T08:50:30","modified_gmt":"2025-03-23T23:50:30","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91ruby%e6%96%87%e5%ad%97%e5%88%97%e6%93%8d%e4%bd%9c%e3%81%ae%e5%9f%ba%e7%a4%8e%e3%81%8b%e3%82%89%e5%bf%9c%e7%94%a8%e3%81%be%e3%81%a715","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1525","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011Ruby\u6587\u5b57\u5217\u64cd\u4f5c\u306e\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u306715\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\">Ruby\u306e\u6587\u5b57\u5217\u64cd\u4f5c\u304c\u91cd\u8981\u306a\u7406\u7531<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u591a\u304f\u306eRuby\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5fc5\u8981\u4e0d\u53ef\u6b20\u306a\u30b9\u30ad\u30eb<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u52b9\u7387\u7684\u306a\u6587\u5b57\u5217\u51e6\u7406\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5de6\u53f3\u3059\u308b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">\u6587\u5b57\u5217\u306e\u57fa\u672c\u6982\u5ff5\u3068\u4f5c\u6210\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u3068\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u306e\u4f7f\u3044\u5206\u3051<\/a>      <\/li>      <li>        <a href=\"#i-5\">\u30d2\u30a2\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u4f7f\u3063\u305f\u8907\u6570\u884c\u6587\u5b57\u5217\u306e\u4f5c\u6210<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-6\">\u6587\u5b57\u5217\u306e\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u8a2d\u5b9a\u3068\u78ba\u8a8d\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-7\">\u57fa\u672c\u7684\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-8\">\u6587\u5b57\u5217\u306e\u7d50\u5408\u3068\u5206\u5272\u3092\u52b9\u7387\u7684\u306b\u884c\u3046<\/a>      <\/li>      <li>        <a href=\"#i-9\">\u90e8\u5206\u6587\u5b57\u5217\u306e\u62bd\u51fa\u3068\u7f6e\u63db\u3092\u4f7f\u3044\u3053\u306a\u3059<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-10\">\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u306e\u5909\u63db\u3068\u30b1\u30fc\u30b9\u51e6\u7406<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-11\">\u6b63\u898f\u8868\u73fe\u3092\u4f7f\u3063\u305f\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u51e6\u7406<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-12\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u57fa\u672c\u3068\u5fdc\u7528<\/a>      <\/li>      <li>        <a href=\"#i-13\">\u30ad\u30e3\u30d7\u30c1\u30e3\u30b0\u30eb\u30fc\u30d7\u3092\u4f7f\u3063\u305f\u67d4\u8edf\u306a\u6587\u5b57\u5217\u62bd\u51fa<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-14\">\u6587\u5b57\u5217\u306e\u691c\u8a3c\u3068\u6574\u5f62\u306b\u304a\u3051\u308b\u6b63\u898f\u8868\u73fe\u6d3b\u7528\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-15\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u6587\u5b57\u5217\u51e6\u7406<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-16\">frozen_string_literal\u306e\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-17\">\u30e1\u30e2\u30ea\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u6587\u5b57\u5217\u64cd\u4f5c\u306e\u5b9f\u88c5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">\u5927\u91cf\u306e\u6587\u5b57\u5217\u51e6\u7406\u3092\u884c\u3046\u969b\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-19\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3068\u89e3\u6c7a\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-20\">CSV\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-21\">\u65e5\u672c\u8a9e\u6587\u5b57\u5217\u7279\u6709\u306e\u51e6\u7406\u3078\u306e\u5bfe\u5fdc<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-22\">HTML\u3084XML\u306e\u6587\u5b57\u5217\u51e6\u7406\u30c6\u30af\u30cb\u30c3\u30af<\/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\">Ruby\u306e\u6587\u5b57\u5217\u64cd\u4f5c\u304c\u91cd\u8981\u306a\u7406\u7531<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u591a\u304f\u306eRuby\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5fc5\u8981\u4e0d\u53ef\u6b20\u306a\u30b9\u30ad\u30eb<\/h3>\n\n\n\n<p>Ruby\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u64cd\u4f5c\u306f\u3001\u307b\u307c\u3059\u3079\u3066\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5fc5\u8981\u3068\u306a\u308b\u57fa\u790e\u7684\u304b\u3064\u91cd\u8981\u306a\u30b9\u30ad\u30eb\u3067\u3059\u3002\u305d\u306e\u7406\u7531\u3068\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5b9f\u52d9\u3067\u306e\u6d3b\u7528\u30b7\u30fc\u30f3\u304c\u6319\u3052\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u51e6\u7406\u3068\u5909\u63db<\/strong><\/li>\n\n\n\n<li>CSV\u3084JSON\u306a\u3069\u306e\u69cb\u9020\u5316\u30c7\u30fc\u30bf\u306e\u89e3\u6790<\/li>\n\n\n\n<li>API\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u52a0\u5de5<\/li>\n\n\n\n<li>\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u691c\u8a3c\u3068\u6574\u5f62<\/li>\n\n\n\n<li><strong>\u30c6\u30ad\u30b9\u30c8\u751f\u6210<\/strong><\/li>\n\n\n\n<li>\u30ec\u30dd\u30fc\u30c8\u3084\u30ed\u30b0\u306e\u51fa\u529b<\/li>\n\n\n\n<li>HTML\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u751f\u6210<\/li>\n\n\n\n<li>\u52d5\u7684\u306aSQL\u6587\u306e\u69cb\u7bc9<\/li>\n\n\n\n<li><strong>\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c<\/strong><\/li>\n\n\n\n<li>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u89e3\u6790<\/li>\n\n\n\n<li>\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u3068\u89e3\u6790<\/li>\n\n\n\n<li>\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u52a0\u5de5<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306f\u5b9f\u52d9\u3067\u3088\u304f\u76ee\u306b\u3059\u308b\u6587\u5b57\u5217\u51e6\u7406\u306e\u4f8b\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=\"\"># \u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u691c\u8a3c\u3068\u6574\u5f62\ndef sanitize_user_input(input)\n  input.strip.downcase.gsub(\/[^a-z0-9\\s]\/, '')\nend\n\n# CSV\u30c7\u30fc\u30bf\u306e\u51e6\u7406\ndef process_csv_line(line)\n  fields = line.split(',').map(&amp;:strip)\n  {\n    name: fields[0],\n    email: fields[1].downcase,\n    age: fields[2].to_i\n  }\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u52b9\u7387\u7684\u306a\u6587\u5b57\u5217\u51e6\u7406\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5de6\u53f3\u3059\u308b<\/h3>\n\n\n\n<p>\u6587\u5b57\u5217\u64cd\u4f5c\u306f\u983b\u7e41\u306b\u884c\u308f\u308c\u308b\u51e6\u7406\u3067\u3042\u308b\u305f\u3081\u3001\u305d\u306e\u5b9f\u88c5\u65b9\u6cd5\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3078\u306e\u5f71\u97ff<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6587\u5b57\u5217\u306e\u4e0d\u9069\u5207\u306a\u51e6\u7406\u306f\u3001\u30e1\u30e2\u30ea\u306e\u904e\u5270\u6d88\u8cbb\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059<\/li>\n\n\n\n<li>\u7279\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u3001\u52b9\u7387\u7684\u306a\u6587\u5b57\u5217\u51e6\u7406\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059<\/li>\n<\/ul>\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\ndef inefficient_concat(strings)\n  result = \"\"\n  strings.each { |s| result += s }  # \u6bce\u56de\u65b0\u3057\u3044\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\n  result\nend\n\n# \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u5b9f\u88c5\ndef efficient_concat(strings)\n  strings.join  # \u4e00\u5ea6\u306e\u64cd\u4f5c\u3067\u6587\u5b57\u5217\u3092\u7d50\u5408\nend<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u51e6\u7406\u901f\u5ea6\u3078\u306e\u5f71\u97ff<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9069\u5207\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u30e1\u30bd\u30c3\u30c9\u306e\u9078\u629e\u304c\u51e6\u7406\u901f\u5ea6\u3092\u5927\u304d\u304f\u5de6\u53f3\u3057\u307e\u3059<\/li>\n\n\n\n<li>\u7279\u306b\u6b63\u898f\u8868\u73fe\u3084\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\u91cd\u8981\u3067\u3059<\/li>\n<\/ul>\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=\"\"># \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u60aa\u3044\u5b9f\u88c5\ndef slow_check(text, words)\n  words.all? { |word| text.include?(word) }  # \u6bce\u56de\u6587\u5b57\u5217\u5168\u4f53\u3092\u30b9\u30ad\u30e3\u30f3\nend\n\n# \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u826f\u3044\u5b9f\u88c5\ndef fast_check(text, words)\n  pattern = \/#{words.join('|')}\/i  # \u4e00\u5ea6\u306e\u6b63\u898f\u8868\u73fe\u3067\u8907\u6570\u306e\u30ef\u30fc\u30c9\u3092\u30c1\u30a7\u30c3\u30af\n  text.match?(pattern)\nend<\/pre>\n\n\n\n<p>\u6587\u5b57\u5217\u64cd\u4f5c\u306e\u91cd\u8981\u6027\u306f\u3001\u5358\u306a\u308b\u6a5f\u80fd\u5b9f\u88c5\u306e\u89b3\u70b9\u3060\u3051\u3067\u306a\u304f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u54c1\u8cea\u5168\u4f53\u306b\u95a2\u308f\u308b\u91cd\u8981\u306a\u8981\u7d20\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u52b9\u7387\u7684\u306a\u6587\u5b57\u5217\u51e6\u7406\u306e\u5b9f\u88c5\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u3092\u3082\u305f\u3089\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5fdc\u7b54\u6027\u5411\u4e0a<\/li>\n\n\n\n<li>\u30b5\u30fc\u30d0\u30fc\u30ea\u30bd\u30fc\u30b9\u306e\u52b9\u7387\u7684\u306a\u5229\u7528<\/li>\n\n\n\n<li>\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u306e\u5b9f\u73fe<\/li>\n\n\n\n<li>\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u306e\u78ba\u4fdd<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u305f\u3081\u3001Ruby\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u306f\u6587\u5b57\u5217\u64cd\u4f5c\u306e\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067\u3001\u4f53\u7cfb\u7684\u306a\u7406\u89e3\u3068\u5b9f\u88c5\u30b9\u30ad\u30eb\u304c\u6c42\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">\u6587\u5b57\u5217\u306e\u57fa\u672c\u6982\u5ff5\u3068\u4f5c\u6210\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u3068\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p>Ruby\u3067\u306f\u3001\u6587\u5b57\u5217\u3092\u4f5c\u6210\u3059\u308b\u969b\u306b\u4e3b\u306b\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\uff08\u2019\uff09\u3068\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\uff08\u201d\uff09\u306e2\u7a2e\u985e\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306b\u306f\u7279\u5fb4\u304c\u3042\u308a\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/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=\"\"># \u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\nstr1 = 'Hello, Ruby'   # \u57fa\u672c\u7684\u306a\u6587\u5b57\u5217\nstr2 = 'It\\'s Ruby'    # \u30a8\u30b9\u30b1\u30fc\u30d7\u304c\u5fc5\u8981\nstr3 = 'Line 1\\nLine 2' # \\n \u306f\u305d\u306e\u307e\u307e\u6587\u5b57\u3068\u3057\u3066\u6271\u308f\u308c\u308b\n\n# \u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\nstr4 = \"Hello, Ruby\"   # \u57fa\u672c\u7684\u306a\u6587\u5b57\u5217\nstr5 = \"It's Ruby\"     # \u30a8\u30b9\u30b1\u30fc\u30d7\u4e0d\u8981\nstr6 = \"Line 1\\nLine 2\" # \\n \u306f\u6539\u884c\u3068\u3057\u3066\u89e3\u91c8\u3055\u308c\u308b\nname = \"Alice\"\nstr7 = \"Hello, #{name}\" # \u5f0f\u5c55\u958b\u304c\u53ef\u80fd<\/pre>\n\n\n\n<p>\u4f7f\u3044\u5206\u3051\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n<div id=\"id-34ecc9b4-e715-4a7e-ae68-e97a1af14029\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u5fb4<\/th><th>\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8<\/th><th>\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8<\/th><\/tr><\/thead><tbody><tr><td>\u5f0f\u5c55\u958b<\/td><td>\u4e0d\u53ef<\/td><td>\u53ef\u80fd<\/td><\/tr><tr><td>\u30a8\u30b9\u30b1\u30fc\u30d7\u30b7\u30fc\u30b1\u30f3\u30b9<\/td><td>\u6700\u5c0f\u9650<\/td><td>\u5168\u3066\u5bfe\u5fdc<\/td><\/tr><tr><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/td><td>\u3084\u3084\u9ad8\u901f<\/td><td>\u3084\u3084\u4f4e\u901f<\/td><\/tr><tr><td>\u4f7f\u7528\u63a8\u5968\u30b7\u30fc\u30f3<\/td><td>\u5358\u7d14\u306a\u6587\u5b57\u5217<br>\u5f0f\u5c55\u958b\u4e0d\u8981\u306a\u5834\u5408<\/td><td>\u5f0f\u5c55\u958b\u304c\u5fc5\u8981\u306a\u5834\u5408<br>\u30a8\u30b9\u30b1\u30fc\u30d7\u30b7\u30fc\u30b1\u30f3\u30b9\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u30d2\u30a2\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u4f7f\u3063\u305f\u8907\u6570\u884c\u6587\u5b57\u5217\u306e\u4f5c\u6210<\/h3>\n\n\n\n<p>\u8907\u6570\u884c\u306b\u308f\u305f\u308b\u6587\u5b57\u5217\u3092\u6271\u3046\u5834\u5408\u3001\u30d2\u30a2\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff08heredoc\uff09\u3092\u4f7f\u7528\u3059\u308b\u3068\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<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=\"\"># \u57fa\u672c\u7684\u306a\u30d2\u30a2\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\nmessage = &lt;&lt;TEXT\n\u3053\u308c\u306f\u8907\u6570\u884c\u306e\n\u30c6\u30ad\u30b9\u30c8\u30e1\u30c3\u30bb\u30fc\u30b8\u3067\u3059\u3002\n  \u30a4\u30f3\u30c7\u30f3\u30c8\u3082\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002\nTEXT\n\n# \u30a4\u30f3\u30c7\u30f3\u30c8\u4ed8\u304d\u30d2\u30a2\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\ndef send_email\n  body = &lt;&lt;~EMAIL\n    \u89aa\u611b\u306a\u308b\u30e6\u30fc\u30b6\u30fc\u69d8\n\n    \u3054\u5229\u7528\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002\n    \u3053\u306e\u30e1\u30fc\u30eb\u306f\u81ea\u52d5\u9001\u4fe1\u3055\u308c\u3066\u3044\u307e\u3059\u3002\n\n    \u656c\u5177\n    \u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\n  EMAIL\n  # \u51e6\u7406\u306e\u7d9a\u304d...\nend\n\n# \u5f0f\u5c55\u958b\u3068\u30a8\u30b9\u30b1\u30fc\u30d7\u3092\u5236\u5fa1\nsql = &lt;&lt;-'SQL'\n  SELECT *\n  FROM users\n  WHERE name = '#{name}' -- \u3053\u306e#{name}\u306f\u5f0f\u5c55\u958b\u3055\u308c\u306a\u3044\nSQL\n\nhtml = &lt;&lt;~\"HTML\"\n  &lt;div&gt;\n    Hello, #{user.name}! -- \u3053\u306e#{user.name}\u306f\u5f0f\u5c55\u958b\u3055\u308c\u308b\n  &lt;\/div&gt;\nHTML<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u6587\u5b57\u5217\u306e\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u8a2d\u5b9a\u3068\u78ba\u8a8d\u65b9\u6cd5<\/h3>\n\n\n\n<p>Ruby\u3067\u306f\u6587\u5b57\u5217\u306e\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u9069\u5207\u306b\u6271\u3046\u3053\u3068\u304c\u3001\u7279\u306b\u65e5\u672c\u8a9e\u3092\u542b\u3080\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u3092\u51e6\u7406\u3059\u308b\u969b\u306b\u91cd\u8981\u3067\u3059\u3002<\/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=\"\"># \u30d5\u30a1\u30a4\u30eb\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u6307\u5b9a\n# coding: utf-8\n\n# \u6587\u5b57\u5217\u306e\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u78ba\u8a8d\nstr = \"\u3053\u3093\u306b\u3061\u306f\"\nputs str.encoding  #=&gt; #&lt;Encoding:UTF-8&gt;\n\n# \u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u5909\u63db\nutf8_str = \"Ruby\"\nsjis_str = utf8_str.encode(\"Shift_JIS\")\nputs sjis_str.encoding  #=&gt; #&lt;Encoding:Shift_JIS&gt;\n\n# \u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u6307\u5b9a\u3067\u6587\u5b57\u5217\u4f5c\u6210\nstr_utf8 = \"\u65e5\u672c\u8a9e\".force_encoding(\"UTF-8\")\nstr_sjis = \"\u65e5\u672c\u8a9e\".force_encoding(\"Shift_JIS\")\n\n# \u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30a8\u30e9\u30fc\u306e\u5bfe\u51e6\nbegin\n  invalid_str = \"\u3053\u3093\u306b\u3061\u306f\".encode(\"ISO-8859-1\")\nrescue Encoding::UndefinedConversionError =&gt; e\n  puts \"\u5909\u63db\u3067\u304d\u306a\u3044\u6587\u5b57\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059: #{e.message}\"\nend\n\n# \u6587\u5b57\u5217\u7d50\u5408\u6642\u306e\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u81ea\u52d5\u5909\u63db\nutf8_str = \"Hello\"\nsjis_str = \"\u3053\u3093\u306b\u3061\u306f\".encode(\"Shift_JIS\")\ncombined = utf8_str + sjis_str  # SJIS\u304cUTF-8\u306b\u81ea\u52d5\u5909\u63db\u3055\u308c\u308b<\/pre>\n\n\n\n<p>\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u51e6\u7406\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30d5\u30a9\u30eb\u30c8\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ruby 2.0\u4ee5\u964d\u306fUTF-8\u304c\u30c7\u30d5\u30a9\u30eb\u30c8<\/li>\n\n\n\n<li>\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306e\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306f\u30de\u30b8\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\u3067\u6307\u5b9a\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u5909\u63db\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5165\u529b\u6642\u306b\u9069\u5207\u306a\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u5909\u63db<\/li>\n\n\n\n<li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5185\u90e8\u3067\u306fUTF-8\u3067\u7d71\u4e00<\/li>\n\n\n\n<li>\u51fa\u529b\u6642\u306b\u5fc5\u8981\u306a\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u5909\u63db<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>force_encoding<\/code>\u3068<code>encode<\/code>\u306e\u4f7f\u3044\u5206\u3051\u3092\u7406\u89e3<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u5909\u63db\u3067\u304d\u306a\u3044\u6587\u5b57\u306e\u4ee3\u66ff\u51e6\u7406\u306e\u691c\u8a0e<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001Ruby\u306e\u6587\u5b57\u5217\u306f\u69d8\u3005\u306a\u65b9\u6cd5\u3067\u4f5c\u6210\u30fb\u64cd\u4f5c\u3067\u304d\u307e\u3059\u304c\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u3001\u53ef\u8aad\u6027\u306e\u9ad8\u3044\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u306e\u4f5c\u6210\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-7\">\u57fa\u672c\u7684\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u6587\u5b57\u5217\u306e\u7d50\u5408\u3068\u5206\u5272\u3092\u52b9\u7387\u7684\u306b\u884c\u3046<\/h3>\n\n\n\n<p>\u6587\u5b57\u5217\u306e\u7d50\u5408\u3068\u5206\u5272\u306f\u6700\u3082\u983b\u7e41\u306b\u884c\u308f\u308c\u308b\u64cd\u4f5c\u306e\u4e00\u3064\u3067\u3059\u3002Ruby\u306b\u306f\u8907\u6570\u306e\u65b9\u6cd5\u304c\u7528\u610f\u3055\u308c\u3066\u304a\u308a\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u6700\u9069\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u6587\u5b57\u5217\u306e\u7d50\u5408<\/strong><\/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=\"\"># 1. + \u6f14\u7b97\u5b50\u306b\u3088\u308b\u7d50\u5408\nname = \"Ruby\" + \" \" + \"Programming\"  # =&gt; \"Ruby Programming\"\n\n# 2. &lt;&lt; \u6f14\u7b97\u5b50\u306b\u3088\u308b\u7d50\u5408\uff08\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\uff09\nmessage = \"Hello\"\nmessage &lt;&lt; \" \" &lt;&lt; \"World\"  # =&gt; \"Hello World\"\n\n# 3. concat \u30e1\u30bd\u30c3\u30c9\u306b\u3088\u308b\u7d50\u5408\uff08\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\uff09\ngreeting = \"Good\"\ngreeting.concat(\" \").concat(\"Morning\")  # =&gt; \"Good Morning\"\n\n# 4. join \u30e1\u30bd\u30c3\u30c9\u306b\u3088\u308b\u914d\u5217\u8981\u7d20\u306e\u7d50\u5408\nwords = [\"Ruby\", \"is\", \"fun\"]\nwords.join(\" \")  # =&gt; \"Ruby is fun\"\n\n# 5. Array#* \u306b\u3088\u308b\u7e70\u308a\u8fd4\u3057\u7d50\u5408\n\"Ruby\" * 3  # =&gt; \"RubyRubyRuby\"\n\n# \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u4f8b\nrequire 'benchmark'\n\nstrings = Array.new(10000) { \"string\" }\n\nBenchmark.bm do |x|\n  x.report(\"+:\") { strings.reduce { |result, str| result + str } }\n  x.report(\"&lt;&lt;:\") { strings.reduce { |result, str| result &lt;&lt; str } }\n  x.report(\"join:\") { strings.join }\nend<\/pre>\n\n\n\n<p><strong>\u6587\u5b57\u5217\u306e\u5206\u5272<\/strong><\/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=\"\"># 1. split \u30e1\u30bd\u30c3\u30c9\u306b\u3088\u308b\u5206\u5272\ntext = \"Ruby,Python,JavaScript\"\nlanguages = text.split(\",\")  # =&gt; [\"Ruby\", \"Python\", \"JavaScript\"]\n\n# 2. \u6b63\u898f\u8868\u73fe\u306b\u3088\u308b\u8907\u96d1\u306a\u5206\u5272\ntext = \"Ruby;Python,JavaScript|PHP\"\nlanguages = text.split(\/[;,|]\/)  # =&gt; [\"Ruby\", \"Python\", \"JavaScript\", \"PHP\"]\n\n# 3. \u6587\u5b57\u6570\u306b\u3088\u308b\u5206\u5272\ntext = \"Ruby programming\"\nchunks = text.scan(\/.{1,5}\/)  # =&gt; [\"Ruby \", \"progr\", \"ammin\", \"g\"]\n\n# 4. \u884c\u306b\u3088\u308b\u5206\u5272\ntext = \"Line 1\\nLine 2\\nLine 3\"\nlines = text.lines  # =&gt; [\"Line 1\\n\", \"Line 2\\n\", \"Line 3\"]<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u90e8\u5206\u6587\u5b57\u5217\u306e\u62bd\u51fa\u3068\u7f6e\u63db\u3092\u4f7f\u3044\u3053\u306a\u3059<\/h3>\n\n\n\n<p>\u6587\u5b57\u5217\u304b\u3089\u7279\u5b9a\u306e\u90e8\u5206\u3092\u62bd\u51fa\u3057\u305f\u308a\u3001\u7f6e\u63db\u3057\u305f\u308a\u3059\u308b\u64cd\u4f5c\u3082\u983b\u7e41\u306b\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/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=\"\"># 1. \u90e8\u5206\u6587\u5b57\u5217\u306e\u62bd\u51fa\ntext = \"Ruby Programming\"\ntext[0, 4]      # =&gt; \"Ruby\"  # \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u9577\u3055\u3092\u6307\u5b9a\ntext[5..-1]     # =&gt; \"Programming\"  # \u7bc4\u56f2\u3092\u6307\u5b9a\ntext[-11..-1]   # =&gt; \"Programming\"  # \u672b\u5c3e\u304b\u3089\u306e\u7bc4\u56f2\u6307\u5b9a\n\n# 2. \u6b63\u898f\u8868\u73fe\u306b\u3088\u308b\u62bd\u51fa\ntext = \"Email: example@ruby.org\"\ntext[\/\\w+@\\w+\\.\\w+\/]  # =&gt; \"example@ruby.org\"\n\n# 3. \u6587\u5b57\u5217\u7f6e\u63db\ntext = \"I like Python\"\ntext.sub(\"Python\", \"Ruby\")    # =&gt; \"I like Ruby\"  # \u6700\u521d\u306e\u4e00\u81f4\u306e\u307f\u7f6e\u63db\ntext.gsub(\"Python\", \"Ruby\")   # =&gt; \"I like Ruby\"  # \u3059\u3079\u3066\u306e\u4e00\u81f4\u3092\u7f6e\u63db\n\n# 4. \u8907\u6570\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u4e00\u62ec\u7f6e\u63db\ntext = \"I like Python and Python is cool\"\nreplacements = {\"Python\" =&gt; \"Ruby\", \"cool\" =&gt; \"awesome\"}\ntext.gsub(\/Python|cool\/, replacements)  # =&gt; \"I like Ruby and Ruby is awesome\"\n\n# 5. \u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u305f\u52d5\u7684\u306a\u7f6e\u63db\ntext = \"price: 100, tax: 10\"\ntext.gsub(\/\\d+\/) { |match| match.to_i * 2 }  # =&gt; \"price: 200, tax: 20\"<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u306e\u5909\u63db\u3068\u30b1\u30fc\u30b9\u51e6\u7406<\/h3>\n\n\n\n<p>\u6587\u5b57\u5217\u306e\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u5909\u63db\u3059\u308b\u64cd\u4f5c\u306f\u3001\u7279\u306b\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u6b63\u898f\u5316\u3084\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u7d71\u4e00\u306b\u91cd\u8981\u3067\u3059\u3002<\/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=\"\"># 1. \u57fa\u672c\u7684\u306a\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u5909\u63db\ntext = \"Ruby Programming\"\ntext.upcase     # =&gt; \"RUBY PROGRAMMING\"\ntext.downcase   # =&gt; \"ruby programming\"\ntext.swapcase   # =&gt; \"rUBY pROGRAMMING\"\ntext.capitalize # =&gt; \"Ruby programming\"\n\n# 2. \u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u30d0\u30fc\u30b8\u30e7\u30f3\ntext = \"Ruby Programming\"\ntext.upcase!    # \u6587\u5b57\u5217\u81ea\u4f53\u3092\u5909\u66f4\ntext.downcase!  # \u6587\u5b57\u5217\u81ea\u4f53\u3092\u5909\u66f4\n\n# 3. \u30bf\u30a4\u30c8\u30eb\u30b1\u30fc\u30b9\u5909\u63db\uff08\u72ec\u81ea\u5b9f\u88c5\uff09\ndef titleize(text)\n  text.split(\/\\s+\/).map(&amp;:capitalize).join(\" \")\nend\n\ntext = \"ruby on rails programming\"\ntitleize(text)  # =&gt; \"Ruby On Rails Programming\"\n\n# 4. \u7279\u6b8a\u306a\u30b1\u30fc\u30b9\u5909\u63db\nclass String\n  def to_snake_case\n    self.gsub(\/::\/, '\/')\n        .gsub(\/([A-Z]+)([A-Z][a-z])\/,'\\1_\\2')\n        .gsub(\/([a-z\\d])([A-Z])\/,'\\1_\\2')\n        .tr(\"-\", \"_\")\n        .downcase\n  end\n\n  def to_camel_case\n    self.split('_').map(&amp;:capitalize).join\n  end\nend\n\n\"ruby_programming\".to_camel_case  # =&gt; \"RubyProgramming\"\n\"RubyProgramming\".to_snake_case   # =&gt; \"ruby_programming\"<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3057\u3066\u4f7f\u7528\u3057\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8003\u616e<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5927\u91cf\u306e\u6587\u5b57\u5217\u7d50\u5408\u306b\u306f<code>join<\/code>\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u3068\u975e\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u5206\u3051<\/li>\n\n\n\n<li>\u6b63\u898f\u8868\u73fe\u306e\u904e\u5ea6\u306a\u4f7f\u7528\u3092\u907f\u3051\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5927\u304d\u306a\u6587\u5b57\u5217\u3092\u6271\u3046\u969b\u306f\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u3092\u691c\u8a0e<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u4e2d\u9593\u6587\u5b57\u5217\u306e\u751f\u6210\u3092\u907f\u3051\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u53ef\u8aad\u6027\u306e\u7dad\u6301<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u96d1\u306a\u6b63\u898f\u8868\u73fe\u306f\u30b3\u30e1\u30f3\u30c8\u3067\u8aac\u660e\u3092\u8ffd\u52a0<\/li>\n\n\n\n<li>\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308b\u547d\u540d\u3092\u5fc3\u304c\u3051\u308b<\/li>\n\n\n\n<li>\u6c4e\u7528\u7684\u306a\u51e6\u7406\u306f\u72ec\u81ea\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u5207\u308a\u51fa\u3059<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-11\">\u6b63\u898f\u8868\u73fe\u3092\u4f7f\u3063\u305f\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u51e6\u7406<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u57fa\u672c\u3068\u5fdc\u7528<\/h3>\n\n\n\n<p>Ruby\u306e\u6b63\u898f\u8868\u73fe\u306f\u3001\u6587\u5b57\u5217\u306e\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306b\u304a\u3044\u3066\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u5b9f\u8df5\u7684\u306a\u5fdc\u7528\u307e\u3067\u3001\u6bb5\u968e\u7684\u306b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>\u57fa\u672c\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0<\/strong><\/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=\"\"># 1. \u6b63\u898f\u8868\u73fe\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\npattern1 = \/ruby\/i          # \u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3057\u306a\u3044\npattern2 = %r{ruby}i        # \u5225\u306e\u8a18\u6cd5\npattern3 = Regexp.new(\"ruby\", Regexp::IGNORECASE)\n\n# 2. \u30de\u30c3\u30c1\u30f3\u30b0\u306e\u57fa\u672c\u64cd\u4f5c\ntext = \"I love Ruby programming\"\n\n# \u30de\u30c3\u30c1\u306e\u78ba\u8a8d\ntext.match?(\/ruby\/i)    # =&gt; true \uff08\u9ad8\u901f\u3001Ruby 2.4\u4ee5\u964d\uff09\ntext =~ \/ruby\/i         # =&gt; 7 \uff08\u30de\u30c3\u30c1\u3057\u305f\u4f4d\u7f6e\uff09\ntext.match(\/ruby\/i)     # =&gt; #&lt;MatchData \"Ruby\"&gt;\n\n# \u5426\u5b9a\u30de\u30c3\u30c1\ntext !~ \/python\/i       # =&gt; true\n\n# 3. \u3088\u304f\u4f7f\u7528\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u4f8b\nemail = \"user@example.com\"\nphone = \"090-1234-5678\"\ndate = \"2024-03-15\"\n\nemail =~ \/\\A[\\w+\\-.]+@[a-z\\d\\-.]+\\.[a-z]+\\z\/i  # \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\nphone =~ \/\\A\\d{2,4}-\\d{2,4}-\\d{4}\\z\/           # \u96fb\u8a71\u756a\u53f7\ndate =~ \/\\A\\d{4}-(?:0[1-9]|1[0-2])-(?:0[1-9]|[12]\\d|3[01])\\z\/  # \u65e5\u4ed8<\/pre>\n\n\n\n<p><strong>\u9ad8\u5ea6\u306a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0<\/strong><\/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=\"\"># 1. \u5148\u8aad\u307f\u30fb\u5f8c\u8aad\u307f\ntext = \"price: $100, cost: $50\"\n\n# \u80af\u5b9a\u5148\u8aad\u307f\ntext.scan(\/\\$\\d+(?=,)\/)      # =&gt; [\"$100\"]  # \u30ab\u30f3\u30de\u306e\u524d\u306e\u91d1\u984d\n\n# \u5426\u5b9a\u5148\u8aad\u307f\ntext.scan(\/\\$\\d+(?!,)\/)      # =&gt; [\"$50\"]   # \u30ab\u30f3\u30de\u304c\u7d9a\u304b\u306a\u3044\u91d1\u984d\n\n# 2. \u6761\u4ef6\u5206\u5c90\u30d1\u30bf\u30fc\u30f3\ndef validate_password(password)\n  pattern = \/\\A\n    (?=.*[A-Z])           # \u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u5927\u6587\u5b57\n    (?=.*[a-z])           # \u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u5c0f\u6587\u5b57\n    (?=.*\\d)              # \u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u6570\u5b57\n    (?=.*[!@#$%^&amp;*])     # \u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u7279\u6b8a\u6587\u5b57\n    .{8,}                 # \u6700\u4f4e8\u6587\u5b57\n  \\z\/x\n\n  pattern.match?(password)\nend\n\n# 3. \u540d\u524d\u4ed8\u304d\u30ad\u30e3\u30d7\u30c1\u30e3\u306e\u6d3b\u7528\nlog = '2024-03-15 10:30:45 [ERROR] Failed to connect: timeout'\npattern = \/\\A\n  (?&lt;date&gt;\\d{4}-\\d{2}-\\d{2})\\s\n  (?&lt;time&gt;\\d{2}:\\d{2}:\\d{2})\\s\n  \\[(?&lt;level&gt;\\w+)\\]\\s\n  (?&lt;message&gt;.+)\n\\z\/x\n\nif match = log.match(pattern)\n  puts \"Date: #{match[:date]}\"\n  puts \"Time: #{match[:time]}\"\n  puts \"Level: #{match[:level]}\"\n  puts \"Message: #{match[:message]}\"\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u30ad\u30e3\u30d7\u30c1\u30e3\u30b0\u30eb\u30fc\u30d7\u3092\u4f7f\u3063\u305f\u67d4\u8edf\u306a\u6587\u5b57\u5217\u62bd\u51fa<\/h3>\n\n\n\n<p>\u30ad\u30e3\u30d7\u30c1\u30e3\u30b0\u30eb\u30fc\u30d7\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u7d50\u679c\u304b\u3089\u5fc5\u8981\u306a\u90e8\u5206\u3092\u52b9\u7387\u7684\u306b\u62bd\u51fa\u3067\u304d\u307e\u3059\u3002<\/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=\"\"># 1. \u57fa\u672c\u7684\u306a\u30ad\u30e3\u30d7\u30c1\u30e3\u30b0\u30eb\u30fc\u30d7\ntext = \"Name: John Smith, Age: 30\"\npattern = \/Name: ([\\w\\s]+), Age: (\\d+)\/\nmatch = text.match(pattern)\n\nname = match[1]  # =&gt; \"John Smith\"\nage = match[2]   # =&gt; \"30\"\n\n# 2. \u540d\u524d\u4ed8\u304d\u30ad\u30e3\u30d7\u30c1\u30e3\u30b0\u30eb\u30fc\u30d7\npattern = \/Name: (?&lt;name&gt;[\\w\\s]+), Age: (?&lt;age&gt;\\d+)\/\nmatch = text.match(pattern)\n\nname = match[:name]  # =&gt; \"John Smith\"\nage = match[:age]    # =&gt; \"30\"\n\n# 3. \u30ad\u30e3\u30d7\u30c1\u30e3\u30b0\u30eb\u30fc\u30d7\u306e\u5165\u308c\u5b50\nhtml = '&lt;div class=\"container\"&gt;&lt;p&gt;Hello, world!&lt;\/p&gt;&lt;\/div&gt;'\npattern = \/&lt;(\\w+)\\s*(?:class=\"([^\"]*)\")?&gt;(?:&lt;(\\w+)&gt;(.+?)&lt;\\\/\\3&gt;)&lt;\\\/\\1&gt;\/\n\nif match = html.match(pattern)\n  outer_tag = match[1]    # =&gt; \"div\"\n  class_name = match[2]   # =&gt; \"container\"\n  inner_tag = match[3]    # =&gt; \"p\"\n  content = match[4]      # =&gt; \"Hello, world!\"\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u6587\u5b57\u5217\u306e\u691c\u8a3c\u3068\u6574\u5f62\u306b\u304a\u3051\u308b\u6b63\u898f\u8868\u73fe\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p>\u5b9f\u8df5\u7684\u306a\u30b7\u30fc\u30f3\u3067\u306e\u6b63\u898f\u8868\u73fe\u306e\u6d3b\u7528\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/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 StringValidator\n  EMAIL_PATTERN = \/\\A[\\w+\\-.]+@[a-z\\d\\-.]+\\.[a-z]+\\z\/i\n  PHONE_PATTERN = \/\\A\\d{2,4}-\\d{2,4}-\\d{4}\\z\/\n  URL_PATTERN = \/\\A(https?:\\\/\\\/)?([\\da-z\\.-]+)\\.([a-z\\.]{2,6})([\\\/\\w \\.-]*)*\\\/?\\z\/\n\n  def self.validate_email(email)\n    email.match?(EMAIL_PATTERN)\n  end\n\n  def self.validate_phone(phone)\n    phone.match?(PHONE_PATTERN)\n  end\n\n  def self.validate_url(url)\n    url.match?(URL_PATTERN)\n  end\n\n  def self.sanitize_filename(filename)\n    filename.gsub(\/[^0-9A-Za-z.\\-]\/, '_')\n  end\n\n  def self.extract_urls(text)\n    text.scan(\/https?:\\\/\\\/[\\w\\-\\.]+\\.\\w+(?:\\\/[\\w\\-\\.\\\/\\?%&amp;=]*)?\/)\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nvalidator = StringValidator\nvalidator.validate_email(\"user@example.com\")  # =&gt; true\nvalidator.validate_phone(\"090-1234-5678\")     # =&gt; true\nvalidator.sanitize_filename(\"my file.txt\")    # =&gt; \"my_file.txt\"<\/pre>\n\n\n\n<p>\u6b63\u898f\u8868\u73fe\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u914d\u616e<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u904e\u5ea6\u306b\u8907\u96d1\u306a\u6b63\u898f\u8868\u73fe\u3092\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u53ef\u80fd\u306a\u5834\u5408\u306f<code>match?<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u5927\u304d\u306a\u6587\u5b57\u5217\u306b\u5bfe\u3059\u308b\u8caa\u6b32\u306a\u91cf\u6307\u5b9a\u5b50\u306e\u4f7f\u7528\u306b\u6ce8\u610f<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u53ef\u8aad\u6027\u306e\u7dad\u6301<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u96d1\u306a\u6b63\u898f\u8868\u73fe\u306fx\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u6574\u5f62<\/li>\n\n\n\n<li>\u30d1\u30bf\u30fc\u30f3\u306e\u610f\u56f3\u3092\u660e\u78ba\u306b\u3059\u308b\u30b3\u30e1\u30f3\u30c8\u3092\u8ffd\u52a0<\/li>\n\n\n\n<li>\u540d\u524d\u4ed8\u304d\u30ad\u30e3\u30d7\u30c1\u30e3\u30b0\u30eb\u30fc\u30d7\u306e\u6d3b\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u983b\u7e41\u306b\u4f7f\u7528\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u306f\u5b9a\u6570\u5316<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u30af\u30e9\u30b9\u306b\u30ab\u30d7\u30bb\u30eb\u5316<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u4f5c\u6210\u3092\u5fd8\u308c\u305a\u306b<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-15\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u6587\u5b57\u5217\u51e6\u7406<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">frozen_string_literal\u306e\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>frozen_string_literal\u306f\u3001\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4e0d\u5909\uff08\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff09\u306b\u3059\u308b\u3053\u3068\u3067\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u524a\u6e1b\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u6a5f\u80fd\u3067\u3059\u3002<\/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=\"\"># frozen_string_literal: true\n\n# \u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\nstr1 = \"hello\"  # \u3053\u306e\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u306f\u51cd\u7d50\u3055\u308c\u308b\nstr2 = +\"hello\" # \u51cd\u7d50\u3092\u89e3\u9664\uff08\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u6587\u5b57\u5217\u3092\u4f5c\u6210\uff09\n\n# \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\nrequire 'benchmark'\n\ndef with_frozen\n  # frozen_string_literal: true \u304c\u6709\u52b9\u306a\u5834\u5408\n  1000.times { \"hello\" }\nend\n\ndef without_frozen\n  # frozen_string_literal: true \u304c\u7121\u52b9\u306a\u5834\u5408\n  1000.times { +\"hello\" }\nend\n\nBenchmark.bm do |x|\n  x.report(\"frozen:   \") { with_frozen }\n  x.report(\"unfrozen: \") { without_frozen }\nend\n\n# \u6587\u5b57\u5217\u306e\u7d50\u5408\u6642\u306e\u6ce8\u610f\u70b9\ndef concat_strings\n  result = +\"\"  # \u7d50\u5408\u7528\u306e\u6587\u5b57\u5217\u306f\u51cd\u7d50\u3092\u89e3\u9664\n  [\"a\", \"b\", \"c\"].each do |str|\n    result &lt;&lt; str  # \u7834\u58ca\u7684\u306a\u7d50\u5408\u304c\u53ef\u80fd\n  end\n  result\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30e1\u30e2\u30ea\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u6587\u5b57\u5217\u64cd\u4f5c\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u6587\u5b57\u5217\u51e6\u7406\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u9069\u5207\u306a\u30e1\u30bd\u30c3\u30c9\u306e\u9078\u629e\u3068\u5b9f\u88c5\u65b9\u6cd5\u306e\u5de5\u592b\u304c\u91cd\u8981\u3067\u3059\u3002<\/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=\"\"># 1. \u6587\u5b57\u5217\u7d50\u5408\u306e\u52b9\u7387\u5316\ndef inefficient_concat(strings)\n  result = \"\"\n  strings.each { |s| result += s }  # \u6bce\u56de\u65b0\u3057\u3044\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\n  result\nend\n\ndef efficient_concat(strings)\n  strings.join  # \u4e00\u5ea6\u306e\u64cd\u4f5c\u3067\u7d50\u5408\nend\n\ndef buffer_concat(strings)\n  result = String.new(capacity: strings.sum(&amp;:length))  # \u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u3092\u4e88\u7d04\n  strings.each { |s| result &lt;&lt; s }\n  result\nend\n\n# \u30d9\u30f3\u30c1\u30de\u30fc\u30af\nrequire 'benchmark'\nstrings = Array.new(10000) { \"string\" }\n\nBenchmark.bm do |x|\n  x.report(\"inefficient: \") { inefficient_concat(strings) }\n  x.report(\"efficient: \") { efficient_concat(strings) }\n  x.report(\"buffer: \") { buffer_concat(strings) }\nend\n\n# 2. \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316\nclass StringProcessor\n  def initialize(large_text)\n    @text = large_text\n  end\n\n  # \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u60aa\u3044\u5b9f\u88c5\n  def process_inefficient\n    lines = @text.split(\"\\n\")\n    processed = lines.map { |line| line.strip.downcase }\n    processed.join(\"\\n\")\n  end\n\n  # \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u5b9f\u88c5\n  def process_efficient\n    result = String.new(capacity: @text.length)\n    @text.each_line do |line|\n      result &lt;&lt; line.strip.downcase &lt;&lt; \"\\n\"\n    end\n    result.chomp!\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u5927\u91cf\u306e\u6587\u5b57\u5217\u51e6\u7406\u3092\u884c\u3046\u969b\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u304c\u6709\u52b9\u3067\u3059\u3002<\/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 LargeTextProcessor\n  # 1. \u30c1\u30e3\u30f3\u30af\u51e6\u7406\u306b\u3088\u308b\u6700\u9069\u5316\n  def process_by_chunks(file_path, chunk_size = 1024 * 1024)\n    File.open(file_path, 'r') do |file|\n      while chunk = file.read(chunk_size)\n        process_chunk(chunk)\n      end\n    end\n  end\n\n  # 2. \u30b9\u30c8\u30ea\u30fc\u30e0\u51e6\u7406\u306b\u3088\u308b\u6700\u9069\u5316\n  def process_stream(file_path)\n    File.open(file_path, 'r') do |file|\n      file.each_line do |line|\n        process_line(line)\n      end\n    end\n  end\n\n  # 3. \u4e26\u5217\u51e6\u7406\u306b\u3088\u308b\u6700\u9069\u5316\n  require 'parallel'\n\n  def parallel_process(file_path, num_threads = 4)\n    lines = File.readlines(file_path)\n    chunks = lines.each_slice(lines.size \/ num_threads).to_a\n\n    Parallel.map(chunks) do |chunk|\n      process_chunk(chunk.join)\n    end.join\n  end\n\n  private\n\n  def process_chunk(chunk)\n    # \u30c1\u30e3\u30f3\u30af\u51e6\u7406\u306e\u30ed\u30b8\u30c3\u30af\n  end\n\n  def process_line(line)\n    # \u884c\u51e6\u7406\u306e\u30ed\u30b8\u30c3\u30af\n  end\nend\n\n# \u5b9f\u88c5\u4f8b\uff1a\u5927\u898f\u6a21\u306a\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u51e6\u7406\nclass LogProcessor\n  def initialize(log_path)\n    @log_path = log_path\n  end\n\n  def analyze_logs\n    pattern = \/\\[(ERROR|WARN|INFO)\\]\\s+(.+)\/\n    stats = { error: 0, warn: 0, info: 0 }\n\n    File.open(@log_path, 'r') do |file|\n      file.each_line do |line|\n        if match = pattern.match(line)\n          level = match[1].downcase.to_sym\n          stats[level] += 1\n        end\n      end\n    end\n\n    stats\n  end\nend<\/pre>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9069\u5207\u306a\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u306e\u8a2d\u5b9a<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u751f\u6210\u3092\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u30c1\u30e3\u30f3\u30af\u51e6\u7406\u306e\u6d3b\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u51e6\u7406\u901f\u5ea6\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>frozen_string_literal\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u52b9\u7387\u7684\u306a\u6587\u5b57\u5217\u7d50\u5408\u30e1\u30bd\u30c3\u30c9\u306e\u9078\u629e<\/li>\n\n\n\n<li>\u4e26\u5217\u51e6\u7406\u306e\u691c\u8a0e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u4fdd\u5b88\u6027\u3068\u306e\u4e21\u7acb<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u4ef6\u306e\u660e\u78ba\u5316<\/li>\n\n\n\n<li>\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306b\u3088\u308b\u52b9\u679c\u6e2c\u5b9a<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30b3\u30e1\u30f3\u30c8\u3068\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-19\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3068\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">CSV\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406\u65b9\u6cd5<\/h3>\n\n\n\n<p>CSV\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u306f\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3067\u3088\u304f\u5fc5\u8981\u3068\u306a\u308b\u64cd\u4f5c\u3067\u3059\u3002\u5927\u898f\u6a21\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/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 'csv'\nrequire 'stringio'\n\nclass CSVProcessor\n  def initialize(file_path)\n    @file_path = file_path\n  end\n\n  # \u5927\u898f\u6a21CSV\u306e\u52b9\u7387\u7684\u306a\u8aad\u307f\u8fbc\u307f\n  def process_large_csv\n    CSV.foreach(@file_path, headers: true) do |row|\n      yield row if block_given?\n    end\n  end\n\n  # \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044CSV\u751f\u6210\n  def generate_csv(data)\n    CSV.generate(String.new, headers: true) do |csv|\n      csv &lt;&lt; data.first.keys  # \u30d8\u30c3\u30c0\u30fc\u884c\n      data.each { |row| csv &lt;&lt; row.values }\n    end\n  end\n\n  # CSV\u30c7\u30fc\u30bf\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3068\u6574\u5f62\n  def validate_and_clean_csv\n    valid_rows = []\n    invalid_rows = []\n\n    CSV.foreach(@file_path, headers: true) do |row|\n      cleaned_row = clean_row(row)\n      if valid_row?(cleaned_row)\n        valid_rows &lt;&lt; cleaned_row\n      else\n        invalid_rows &lt;&lt; row\n      end\n    end<\/pre>\n\n\n[valid_rows, invalid_rows]\n\n\n\n<p>end private def clean_row(row) row.to_h.transform_values do |value| value.to_s.strip.gsub(\/[[:space:]]+\/, \u2018 \u2018) end end def valid_row?(row) row.values.none?(&amp;:empty?) end end # \u4f7f\u7528\u4f8b processor = CSVProcessor.new(\u2018data.csv\u2019) # \u5927\u898f\u6a21CSV\u306e\u51e6\u7406 processor.process_large_csv do |row| # \u5404\u884c\u306e\u51e6\u7406 puts row[\u2018name\u2019] end<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u65e5\u672c\u8a9e\u6587\u5b57\u5217\u7279\u6709\u306e\u51e6\u7406\u3078\u306e\u5bfe\u5fdc<\/h3>\n\n\n\n<p>\u65e5\u672c\u8a9e\u6587\u5b57\u5217\u3092\u6271\u3046\u969b\u306f\u3001\u6587\u5b57\u30b3\u30fc\u30c9\u3084\u6587\u5b57\u7a2e\u306e\u9055\u3044\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/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 JapaneseTextProcessor\n  KANA_CONVERSION = {\n    '\u3042' =&gt; '\u30a2', '\u3044' =&gt; '\u30a4', '\u3046' =&gt; '\u30a6',\n    # ... \u4ed6\u306e\u6587\u5b57\u306e\u5909\u63db\u30de\u30c3\u30d7\n  }.freeze\n\n  def initialize(text)\n    @text = text\n  end\n\n  # \u3072\u3089\u304c\u306a\u3092\u30ab\u30bf\u30ab\u30ca\u306b\u5909\u63db\n  def to_katakana\n    @text.tr('\u3041-\u3093', '\u30a1-\u30f3')\n  end\n\n  # \u30ab\u30bf\u30ab\u30ca\u3092\u3072\u3089\u304c\u306a\u306b\u5909\u63db\n  def to_hiragana\n    @text.tr('\u30a1-\u30f3', '\u3041-\u3093')\n  end\n\n  # \u534a\u89d2\u30ab\u30ca\u3092\u5168\u89d2\u30ab\u30ca\u306b\u5909\u63db\n  def normalize_width\n    @text.unicode_normalize(:nfkc)\n  end\n\n  # \u6587\u5b57\u7a2e\u306e\u5224\u5b9a\n  def character_types\n    types = {\n      hiragana: 0,\n      katakana: 0,\n      kanji: 0,\n      ascii: 0,\n      other: 0\n    }\n\n    @text.each_char do |char|\n      case char\n      when \/\\p{Hiragana}\/\n        types[:hiragana] += 1\n      when \/\\p{Katakana}\/\n        types[:katakana] += 1\n      when \/\\p{Han}\/\n        types[:kanji] += 1\n      when \/\\p{ASCII}\/\n        types[:ascii] += 1\n      else\n        types[:other] += 1\n      end\n    end\n\n    types\n  end\n\n  # \u6587\u5b57\u5217\u306e\u9577\u3055\uff08\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u5bfe\u5fdc\uff09\n  def text_length\n    @text.length\n  end\n\n  def display_width\n    @text.each_char.sum { |c| c.ascii_only? ? 1 : 2 }\n  end\nend\n\n# \u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b\nprocessor = JapaneseTextProcessor.new(\"\u3053\u3093\u306b\u3061\u306f\u3000world\u3000\uff11\uff12\uff13\")\nputs processor.character_types\nputs processor.display_width<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">HTML\u3084XML\u306e\u6587\u5b57\u5217\u51e6\u7406\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>HTML\u3084XML\u306e\u51e6\u7406\u3067\u306f\u3001\u9069\u5207\u306a\u30d1\u30fc\u30b9\u3068\u751f\u6210\u304c\u91cd\u8981\u3067\u3059\u3002<\/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 'nokogiri'\n\nclass HTMLProcessor\n  def initialize(html)\n    @html = html\n    @doc = Nokogiri::HTML(@html)\n  end\n\n  # \u5b89\u5168\u306aHTML\u751f\u6210\n  def sanitize_html\n    allowed_tags = %w[p a b i strong em]\n    allowed_attributes = %w[href title]\n\n    @doc.css('*').each do |node|\n      unless allowed_tags.include?(node.name)\n        node.replace(node.text)\n      end\n\n      node.attributes.each do |attr_name, attr|\n        unless allowed_attributes.include?(attr_name)\n          attr.remove\n        end\n      end\n    end\n\n    @doc.to_html\n  end\n\n  # \u30e1\u30bf\u30bf\u30b0\u306e\u62bd\u51fa\n  def extract_meta_tags\n    meta_tags = {}\n    @doc.css('meta').each do |meta|\n      name = meta['name'] || meta['property']\n      meta_tags[name] = meta['content'] if name\n    end\n    meta_tags\n  end\n\n  # \u30ea\u30f3\u30af\u306e\u62bd\u51fa\u3068\u691c\u8a3c\n  def validate_links\n    links = []\n    @doc.css('a').each do |link|\n      href = link['href']\n      next unless href\n\n      links &lt;&lt; {\n        url: href,\n        text: link.text,\n        valid: valid_url?(href)\n      }\n    end\n    links\n  end\n\n  private\n\n  def valid_url?(url)\n    uri = URI.parse(url)\n    uri.is_a?(URI::HTTP) || uri.is_a?(URI::HTTPS)\n  rescue URI::InvalidURIError\n    false\n  end\nend\n\n# \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30a8\u30f3\u30b8\u30f3\u306e\u5b9f\u88c5\u4f8b\nclass SimpleTemplate\n  def initialize(template)\n    @template = template\n  end\n\n  def render(variables = {})\n    result = @template.dup\n    variables.each do |key, value|\n      result.gsub!(\/\\{\\{\\s*#{key}\\s*\\}\\}\/, value.to_s)\n    end\n    result\n  end\nend\n\n# \u4f7f\u7528\u4f8b\ntemplate = SimpleTemplate.new(&lt;&lt;-TEMPLATE)\n&lt;div class=\"user-profile\"&gt;\n  &lt;h1&gt;{{name}}&lt;\/h1&gt;\n  &lt;p&gt;Email: {{email}}&lt;\/p&gt;\n  &lt;p&gt;Age: {{age}}&lt;\/p&gt;\n&lt;\/div&gt;\nTEMPLATE\n\nvariables = {\n  name: '\u5c71\u7530\u592a\u90ce',\n  email: 'yamada@example.com',\n  age: 30\n}\n\nputs template.render(variables)<\/pre>\n\n\n\n<p>\u5b9f\u8df5\u7684\u306a\u6587\u5b57\u5217\u51e6\u7406\u3092\u884c\u3046\u969b\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u8003\u616e<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e0d\u6b63\u306a\u30c7\u30fc\u30bf\u3078\u306e\u5bfe\u5fdc<\/li>\n\n\n\n<li>\u6587\u5b57\u30b3\u30fc\u30c9\u306e\u9069\u5207\u306a\u51e6\u7406<\/li>\n\n\n\n<li>\u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u88c5<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30e1\u30e2\u30ea\u4f7f\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406<\/li>\n\n\n\n<li>\u30b9\u30c8\u30ea\u30fc\u30e0\u51e6\u7406\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3078\u306e\u914d\u616e<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5165\u529b\u30c7\u30fc\u30bf\u306e\u30b5\u30cb\u30bf\u30a4\u30ba<\/li>\n\n\n\n<li>XSS\u5bfe\u7b56\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30a8\u30b9\u30b1\u30fc\u30d7\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4fdd\u5b88\u6027\u3068\u518d\u5229\u7528\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3055\u308c\u305f\u8a2d\u8a08<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u62bd\u8c61\u5316<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u306e\u4f5c\u6210<\/li>\n<\/ul>\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-1525","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\/1525","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=1525"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1525\/revisions"}],"predecessor-version":[{"id":1526,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1525\/revisions\/1526"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1525"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}