{"id":1548,"date":"2025-03-24T08:50:26","date_gmt":"2025-03-23T23:50:26","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1548"},"modified":"2025-03-24T08:50:26","modified_gmt":"2025-03-23T23:50:26","slug":"%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91ruby%e6%bc%94%e7%ae%97%e5%ad%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%892024-%e3%80%9c%e5%9f%ba%e6%9c%ac%e3%81%8b%e3%82%89%e5%bf%9c%e7%94%a8%e3%81%be","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1548","title":{"rendered":"\u3010\u4fdd\u5b58\u7248\u3011Ruby\u6f14\u7b97\u5b50\u5b8c\u5168\u30ac\u30a4\u30c92024 \u301c\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306e20\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af\u301c"},"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\u6f14\u7b97\u5b50\u3068\u306f\uff1f\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u6f14\u7b97\u306e\u5f79\u5272\u3068\u91cd\u8981\u6027<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">Ruby\u306a\u3089\u3067\u306f\u306e\u6f14\u7b97\u306e\u7279\u5fb4\u3068\u6ce8\u76ee\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">Ruby\u6f14\u7b97\u306e\u57fa\u672c\u3068\u7a2e\u985e\u3092\u5fb9\u5e95\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u7b97\u8853\u6f14\u7b97\u5b50\u3067\u6570\u5024\u3092\u81ea\u7531\u306b\u64cd\u308b<\/a>      <\/li>      <li>        <a href=\"#i-5\">\u6bd4\u8f03\u6f14\u7b97\u5b50\u3067\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u8a55\u4fa1\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u8ad6\u7406\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u306e\u5b9f\u88c5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u4ee3\u5165\u6f14\u7b97\u5b50\u3067\u5909\u6570\u3092\u52b9\u7387\u7684\u306b\u64cd\u4f5c\u3059\u308b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">\u77e5\u3063\u3066\u304a\u304f\u3079\u304d\u7279\u6b8a\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">\u5b89\u5168\u306a\u30ca\u30eb\u6f14\u7b97\u5b50&amp;.\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u6f14\u7b97\u5b50=&gt;\u306e\u5a01\u529b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u7bc4\u56f2\u6f14\u7b97\u5b50..\u3068\u2026\u306e\u6d3b\u7528<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-12\">\u5b9f\u8df5\u7684\u306a\u6f14\u7b97\u5b50\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3068\u6f14\u7b97\u5b50\u306e\u7d44\u307f\u5408\u308f\u305b<\/a>      <\/li>      <li>        <a href=\"#i-14\">\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u30ef\u30f3\u30e9\u30a4\u30ca\u30fc\u306e\u5b9f\u88c5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u6f14\u7b97\u5b50\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u306b\u3088\u308b\u30ab\u30b9\u30bf\u30de\u30a4\u30ba<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-16\">\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">\u6f14\u7b97\u5b50\u306e\u512a\u5148\u9806\u4f4d\u3092\u7406\u89e3\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u53ef\u8aad\u6027\u3092\u91cd\u8996\u3057\u305f\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u6f14\u7b97\u5b50\u306e\u9078\u629e<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-20\">\u3088\u304f\u3042\u308b\u30d0\u30b0\u3068\u89e3\u6c7a\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-21\">\u6f14\u7b97\u5b50\u4f7f\u7528\u6642\u306e\u4e00\u822c\u7684\u306a\u30df\u30b9\u3068\u5bfe\u7b56<\/a>      <\/li>      <li>        <a href=\"#i-22\">\u30c7\u30d0\u30c3\u30b0\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u3067\u306e\u6f14\u7b97\u306e\u6271\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\">Ruby\u306e\u6f14\u7b97\u5b50\u3068\u306f\uff1f\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u6f14\u7b97\u306e\u5f79\u5272\u3068\u91cd\u8981\u6027<\/h3>\n\n\n\n<p>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u6f14\u7b97\u5b50\u306f\u3001\u30c7\u30fc\u30bf\u306e\u64cd\u4f5c\u3084\u8a08\u7b97\u3092\u884c\u3046\u305f\u3081\u306e\u57fa\u672c\u7684\u304b\u3064\u4e0d\u53ef\u6b20\u306a\u8981\u7d20\u3067\u3059\u3002\u7279\u306bRuby\u3067\u306f\u3001\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u3053\u3068\u3067\u8907\u96d1\u306a\u51e6\u7406\u3092\u7c21\u6f54\u306b\u8868\u73fe\u3067\u304d\u308b\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6f14\u7b97\u5b50\u304c\u6301\u3064\u4e3b\u306a\u5f79\u5272\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u306e\u8a08\u7b97\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u5024\u306e\u52a0\u6e1b\u4e57\u9664<\/li>\n\n\n\n<li>\u6587\u5b57\u5217\u306e\u9023\u7d50<\/li>\n\n\n\n<li>\u914d\u5217\u3084\u30cf\u30c3\u30b7\u30e5\u306e\u64cd\u4f5c<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6761\u4ef6\u306e\u8a55\u4fa1<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5024\u306e\u6bd4\u8f03<\/li>\n\n\n\n<li>\u771f\u507d\u5024\u306e\u5224\u5b9a<\/li>\n\n\n\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u78ba\u8a8d<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5909\u6570\u306e\u64cd\u4f5c<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5024\u306e\u4ee3\u5165<\/li>\n\n\n\n<li>\u53c2\u7167\u306e\u53d7\u3051\u6e21\u3057<\/li>\n\n\n\n<li>\u8907\u5408\u7684\u306a\u6f14\u7b97\u3068\u4ee3\u5165<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">Ruby\u306a\u3089\u3067\u306f\u306e\u6f14\u7b97\u306e\u7279\u5fb4\u3068\u6ce8\u76ee\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p>Ruby\u306e\u6f14\u7b97\u5b50\u306b\u306f\u3001\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306b\u306f\u306a\u3044\u72ec\u81ea\u306e\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u3059\u3079\u3066\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6f14\u7b97\u5b50\u306e\u591a\u304f\u306f\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u6f14\u7b97\u5b50\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u53ef\u80fd<\/li>\n\n\n\n<li>\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u304c\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u67d4\u8edf\u306a\u6f14\u7b97\u5b50\u306e\u8a18\u6cd5<\/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=\"\"># \u901a\u5e38\u306e\u6f14\u7b97\u5b50\u8a18\u6cd5\nresult = 5 + 3\n\n# \u30e1\u30bd\u30c3\u30c9\u5f62\u5f0f\u3067\u306e\u547c\u3073\u51fa\u3057\nresult = 5.+(3)  # \u4e0a\u8a18\u3068\u540c\u3058\u7d50\u679c<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u4fbf\u5229\u306a\u7279\u6b8a\u6f14\u7b97\u5b50<\/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=\"\"># \u5b89\u5168\u306a\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\uff08\u307c\u3063\u3061\u6f14\u7b97\u5b50\uff09\nuser&amp;.name  # user\u304cnil\u3067\u3082\u4f8b\u5916\u304c\u767a\u751f\u3057\u306a\u3044\n\n# \u7bc4\u56f2\u6f14\u7b97\u5b50\nnumbers = 1..5  # 1\u304b\u30895\u307e\u3067\u306e\u7bc4\u56f2\u3092\u4f5c\u6210<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u76f4\u611f\u7684\u306a\u771f\u507d\u5024\u306e\u6271\u3044<\/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=\"\"># nil\u3068false\u4ee5\u5916\u306f\u3059\u3079\u3066\u771f\u3068\u3057\u3066\u8a55\u4fa1\nvalue = 0\nif value  # 0\u306f\u771f\u3068\u3057\u3066\u8a55\u4fa1\u3055\u308c\u308b\n  puts \"True!\"\nend<\/pre>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3068\u306e\u89aa\u548c\u6027<\/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=\"\"># \u6f14\u7b97\u5b50\u3068\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u7d44\u307f\u5408\u308f\u305b\n[\"ruby\", \"python\", \"java\"]\n  .map(&amp;:upcase)\n  .select { |lang| lang.length &gt; 4 }<\/pre>\n\n\n\n<p>\u3053\u306e\u7279\u5fb4\u306b\u3088\u308a\u3001Ruby\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u9ad8\u307e\u308b<\/li>\n\n\n\n<li>\u51e6\u7406\u3092\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u72ec\u81ea\u306e\u6f14\u7b97\u5b50\u3092\u5b9a\u7fa9\u3057\u3066\u8868\u73fe\u529b\u3092\u62e1\u5f35\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3068\u306e\u7d71\u5408\u304c\u81ea\u7136<\/li>\n<\/ul>\n\n\n\n<p>\u521d\u5fc3\u8005\u306e\u65b9\u306f\u3001\u307e\u305a\u306f\u57fa\u672c\u7684\u306a\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9\u3092\u7406\u89e3\u3057\u3001\u5f90\u3005\u306b\u7279\u6b8a\u306a\u6f14\u7b97\u5b50\u3084\u5fdc\u7528\u7684\u306a\u4f7f\u3044\u65b9\u3092\u5b66\u3093\u3067\u3044\u304f\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u6f14\u7b97\u5b50\u306e\u7a2e\u985e\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">Ruby\u6f14\u7b97\u306e\u57fa\u672c\u3068\u7a2e\u985e\u3092\u5fb9\u5e95\u89e3\u8aac<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u7b97\u8853\u6f14\u7b97\u5b50\u3067\u6570\u5024\u3092\u81ea\u7531\u306b\u64cd\u308b<\/h3>\n\n\n\n<p>Ruby\u306e\u7b97\u8853\u6f14\u7b97\u5b50\u306f\u3001\u6570\u5024\u8a08\u7b97\u306e\u57fa\u672c\u3068\u306a\u308b\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u5358\u7d14\u306a\u8a08\u7b97\u304b\u3089\u8907\u96d1\u306a\u6570\u5024\u64cd\u4f5c\u307e\u3067\u3001\u69d8\u3005\u306a\u5834\u9762\u3067\u6d3b\u7528\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\u7b97\u8853\u6f14\u7b97\u5b50\na = 10\nb = 3\n\nputs a + b   # \u52a0\u7b97: 13\nputs a - b   # \u6e1b\u7b97: 7\nputs a * b   # \u4e57\u7b97: 30\nputs a \/ b   # \u9664\u7b97: 3\uff08\u6574\u6570\u540c\u58eb\u306e\u5834\u5408\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306f\u5207\u308a\u6368\u3066\uff09\nputs a % b   # \u5270\u4f59: 1\nputs a ** b  # \u3079\u304d\u4e57: 1000\n\n# \u5c0f\u6570\u70b9\u3092\u542b\u3080\u8a08\u7b97\nx = 10.0\ny = 3.0\nputs x \/ y   # 3.3333333333333335\uff08\u5c0f\u6570\u70b9\u4ee5\u4e0b\u3082\u8a08\u7b97\u3055\u308c\u308b\uff09\n\n# \u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\/\u30c7\u30af\u30ea\u30e1\u30f3\u30c8\u306e\u4ee3\u66ff\u8868\u73fe\ncount = 0\ncount += 1   # \u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\ncount -= 1   # \u30c7\u30af\u30ea\u30e1\u30f3\u30c8<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u6bd4\u8f03\u6f14\u7b97\u5b50\u3067\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u8a55\u4fa1\u3059\u308b<\/h3>\n\n\n\n<p>\u6bd4\u8f03\u6f14\u7b97\u5b50\u306f\u3001\u5024\u306e\u95a2\u4fc2\u6027\u3092\u8a55\u4fa1\u3057\u3001\u771f\u507d\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u306e\u6bd4\u8f03\u3084\u6761\u4ef6\u5206\u5c90\u3067\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\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\u6bd4\u8f03\u6f14\u7b97\u5b50\nx = 5\ny = 10\n\nputs x == y    # \u7b49\u3057\u3044: false\nputs x != y    # \u7b49\u3057\u304f\u306a\u3044: true\nputs x &gt; y     # \u3088\u308a\u5927\u304d\u3044: false\nputs x &lt; y     # \u3088\u308a\u5c0f\u3055\u3044: true\nputs x &gt;= y    # \u4ee5\u4e0a: false\nputs x &lt;= y    # \u4ee5\u4e0b: true\n\n# \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u540c\u4e00\u6027\u30c1\u30a7\u30c3\u30af\nstr1 = \"Hello\"\nstr2 = \"Hello\"\nstr3 = str1\n\nputs str1 == str2   # true\uff08\u5024\u304c\u540c\u3058\uff09\nputs str1.equal?(str2)  # false\uff08\u7570\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\nputs str1.equal?(str3)  # true\uff08\u540c\u3058\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\n\n# \u7d44\u307f\u5408\u308f\u305b\u6bd4\u8f03\u6f14\u7b97\u5b50\nputs 1 &lt;=&gt; 2    # -1\uff08\u5de6\u304c\u5c0f\u3055\u3044\uff09\nputs 2 &lt;=&gt; 2    # 0\uff08\u7b49\u3057\u3044\uff09\nputs 3 &lt;=&gt; 2    # 1\uff08\u5de6\u304c\u5927\u304d\u3044\uff09<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u8ad6\u7406\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u8ad6\u7406\u6f14\u7b97\u5b50\u306f\u3001\u8907\u6570\u306e\u6761\u4ef6\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u8a55\u4fa1\u3059\u308b\u969b\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u6761\u4ef6\u5206\u5c90\u306e\u5b9f\u88c5\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\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\u8ad6\u7406\u6f14\u7b97\u5b50\nx = 5\ny = 10\n\n# AND\u6f14\u7b97\u5b50\nputs x &gt; 0 &amp;&amp; y &lt; 20    # true\uff08\u4e21\u65b9\u306e\u6761\u4ef6\u304c\u771f\uff09\nputs x &lt; 0 &amp;&amp; y &lt; 20    # false\uff08\u4e00\u65b9\u304c\u507d\uff09\n\n# OR\u6f14\u7b97\u5b50\nputs x &gt; 0 || y &gt; 20    # true\uff08\u4e00\u65b9\u304c\u771f\uff09\nputs x &lt; 0 || y &gt; 20    # false\uff08\u4e21\u65b9\u304c\u507d\uff09\n\n# NOT\u6f14\u7b97\u5b50\nputs !true    # false\nputs !false   # true\n\n# \u77ed\u7d61\u8a55\u4fa1\ndef heavy_calculation\n  puts \"\u5b9f\u884c\u3055\u308c\u307e\u3057\u305f\"\n  true\nend\n\n# &amp;&amp;\u306e\u77ed\u7d61\u8a55\u4fa1\uff08false\u306e\u5834\u5408\u3001\u53f3\u5074\u306f\u8a55\u4fa1\u3055\u308c\u306a\u3044\uff09\nfalse &amp;&amp; heavy_calculation  # heavy_calculation\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044\n\n# ||\u306e\u77ed\u7d61\u8a55\u4fa1\uff08true\u306e\u5834\u5408\u3001\u53f3\u5074\u306f\u8a55\u4fa1\u3055\u308c\u306a\u3044\uff09\ntrue || heavy_calculation  # heavy_calculation\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u4ee3\u5165\u6f14\u7b97\u5b50\u3067\u5909\u6570\u3092\u52b9\u7387\u7684\u306b\u64cd\u4f5c\u3059\u308b<\/h3>\n\n\n\n<p>\u4ee3\u5165\u6f14\u7b97\u5b50\u306f\u3001\u5909\u6570\u306b\u5024\u3092\u683c\u7d0d\u3059\u308b\u57fa\u672c\u7684\u306a\u64cd\u4f5c\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u8907\u5408\u4ee3\u5165\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u306b\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\u4ee3\u5165\u6f14\u7b97\u5b50\nx = 5   # \u5358\u7d14\u306a\u4ee3\u5165\n\n# \u8907\u5408\u4ee3\u5165\u6f14\u7b97\u5b50\nx += 3   # x = x + 3 \u3068\u540c\u3058\nx -= 2   # x = x - 2 \u3068\u540c\u3058\nx *= 4   # x = x * 4 \u3068\u540c\u3058\nx \/= 2   # x = x \/ 2 \u3068\u540c\u3058\nx %= 3   # x = x % 3 \u3068\u540c\u3058\nx **= 2  # x = x ** 2 \u3068\u540c\u3058\n\n# \u591a\u91cd\u4ee3\u5165\na, b = 1, 2   # a = 1, b = 2\nx, y = y, x   # \u5024\u306e\u4ea4\u63db\n\n# \u914d\u5217\u306e\u5206\u5272\u4ee3\u5165\narray = [1, 2, 3]\nfirst, *rest = array   # first = 1, rest = [2, 3]<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u6f14\u7b97\u5b50\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8907\u96d1\u306a\u51e6\u7406\u3082\u52b9\u7387\u7684\u306b\u5b9f\u88c5\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001Ruby\u306a\u3089\u3067\u306f\u306e\u7279\u6b8a\u306a\u6f14\u7b97\u5b50\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">\u77e5\u3063\u3066\u304a\u304f\u3079\u304d\u7279\u6b8a\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u5b89\u5168\u306a\u30ca\u30eb\u6f14\u7b97\u5b50&amp;.\u306e\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u307c\u3063\u3061\u6f14\u7b97\u5b50\uff08Safe Navigation Operator\uff09\u3068\u3057\u3066\u77e5\u3089\u308c\u308b<code>&amp;.<\/code>\u306f\u3001nil\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3059\u308b\u5b89\u5168\u306a\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u3092\u5b9f\u73fe\u3057\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=\"\"># \u5f93\u6765\u306e nil \u30c1\u30a7\u30c3\u30af\nuser = nil\nname = user ? user.name : nil\nputs name  # nil\n\n# \u307c\u3063\u3061\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\nname = user&amp;.name  # \u540c\u3058\u7d50\u679c\u3092\u3088\u308a\u7c21\u6f54\u306b\u8868\u73fe\nputs name  # nil\n\n# \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3067\u306e\u6d3b\u7528\nclass User\n  def address\n    @address\n  end\nend\n\nclass Address\n  def city\n    \"Tokyo\"\n  end\nend\n\nuser = User.new\n# \u6df1\u3044\u30cd\u30b9\u30c8\u3067\u3082\u5b89\u5168\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\ncity = user&amp;.address&amp;.city  # nil\u304c\u8fd4\u308b\uff08\u4f8b\u5916\u306f\u767a\u751f\u3057\u306a\u3044\uff09\n\n# \u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b\ndef display_user_info(user)\n  puts \"Name: #{user&amp;.name}\"\n  puts \"Email: #{user&amp;.email}\"\n  puts \"City: #{user&amp;.address&amp;.city}\"\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u6f14\u7b97\u5b50=&gt;\u306e\u5a01\u529b<\/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\u6f14\u7b97\u5b50\u306f\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\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\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\ncase {name: \"Alice\", age: 25, city: \"Tokyo\"}\nin {name: String =&gt; name, age: Integer =&gt; age}\n  puts \"Name: #{name}, Age: #{age}\"\nend\n\n# \u914d\u5217\u306e\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\ncase [1, 2, 3]\nin [Integer, Integer =&gt; x, 3]\n  puts \"Second number is #{x}\"  # \"Second number is 2\"\nend\n\n# \u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5206\u89e3\nresponse = {\n  status: \"success\",\n  data: {\n    user: {\n      name: \"Bob\",\n      settings: { theme: \"dark\" }\n    }\n  }\n}\n\ncase response\nin { status: \"success\", data: { user: { name: String =&gt; name } } }\n  puts \"User name: #{name}\"  # \"User name: Bob\"\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u7bc4\u56f2\u6f14\u7b97\u5b50..\u3068\u2026\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>\u7bc4\u56f2\u6f14\u7b97\u5b50\u306f\u3001\u5024\u306e\u9023\u7d9a\u3092\u8868\u73fe\u3059\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002<code>..<\/code>\u306f\u7d42\u7aef\u3092\u542b\u307f\u3001<code>...<\/code>\u306f\u7d42\u7aef\u3092\u542b\u307f\u307e\u305b\u3093\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\u7bc4\u56f2\u306e\u4f5c\u6210\ninclusive_range = 1..5   # 1\u304b\u30895\u307e\u3067\uff085\u3092\u542b\u3080\uff09\nexclusive_range = 1...5  # 1\u304b\u30894\u307e\u3067\uff085\u3092\u542b\u307e\u306a\u3044\uff09\n\n# \u914d\u5217\u306e\u30b9\u30e9\u30a4\u30b9\narray = [0, 1, 2, 3, 4, 5]\nputs array[2..4]   # [2, 3, 4]\nputs array[2...4]  # [2, 3]\n\n# \u7bc4\u56f2\u306e\u7e70\u308a\u8fd4\u3057\u51e6\u7406\n(1..3).each { |n| puts n }  # 1, 2, 3\u3092\u51fa\u529b\n\n# \u6587\u5b57\u306e\u7bc4\u56f2\n('a'..'e').each { |char| print char }  # abcde\u3092\u51fa\u529b\n\n# \u65e5\u4ed8\u306e\u7bc4\u56f2\nrequire 'date'\nstart_date = Date.today\nend_date = start_date + 7\n\n(start_date..end_date).each do |date|\n  puts date.strftime('%Y-%m-%d')\nend\n\n# \u6761\u4ef6\u5f0f\u3067\u306e\u6d3b\u7528\nage = 25\ncase age\nwhen 0..12\n  puts \"Child\"\nwhen 13..19\n  puts \"Teenager\"\nwhen 20..64\n  puts \"Adult\"\nelse\n  puts \"Senior\"\nend\n\n# step \u30e1\u30bd\u30c3\u30c9\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\n(0..10).step(2) { |n| print \"#{n} \" }  # 0 2 4 6 8 10<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u7279\u6b8a\u6f14\u7b97\u5b50\u306f\u3001\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\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\u307c\u3063\u3061\u6f14\u7b97\u5b50\u3068\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306f\u3001\u30e2\u30c0\u30f3\u306aRuby\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6f14\u7b97\u5b50\u3092\u5b9f\u8df5\u7684\u306b\u6d3b\u7528\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-12\">\u5b9f\u8df5\u7684\u306a\u6f14\u7b97\u5b50\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3068\u6f14\u7b97\u5b50\u306e\u7d44\u307f\u5408\u308f\u305b<\/h3>\n\n\n\n<p>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3068\u6f14\u7b97\u5b50\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u51e6\u7406\u3092\u7c21\u6f54\u306b\u8a18\u8ff0\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=\"\"># \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\u306e\u4f8b\nusers = [\n  { name: \"Alice\", age: 25 },\n  { name: \"Bob\", age: 30 },\n  { name: \"Charlie\", age: 35 }\n]\n\n# \u8907\u6570\u306e\u64cd\u4f5c\u3092\u9023\u9396\u3055\u305b\u308b\nresult = users\n  .select { |user| user[:age] &gt;= 30 }  # 30\u6b73\u4ee5\u4e0a\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n  .map { |user| user[:name] }          # \u540d\u524d\u3092\u62bd\u51fa\n  .map(&amp;:upcase)                       # \u5927\u6587\u5b57\u306b\u5909\u63db\n  .join(\", \")                          # \u30ab\u30f3\u30de\u3067\u7d50\u5408\n\nputs result  # \"BOB, CHARLIE\"\n\n# \u6761\u4ef6\u4ed8\u304d\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\ndef process_data(data)\n  data\n    &amp;.strip                    # nil\u3067\u306a\u3044\u5834\u5408\u306e\u307ftrim\n    &amp;.gsub(\/\\s+\/, \" \")        # \u8907\u6570\u306e\u7a7a\u767d\u3092\u5358\u4e00\u306e\u7a7a\u767d\u306b\n    &amp;.split(\",\")              # \u30ab\u30f3\u30de\u3067\u5206\u5272\n    &amp;.map(&amp;:to_i)             # \u6574\u6570\u306b\u5909\u63db\n    &amp;.select { |n| n &gt; 0 }    # \u6b63\u306e\u6570\u306e\u307f\u9078\u629e\n    || []                     # nil\u306e\u5834\u5408\u306f\u7a7a\u914d\u5217\u3092\u8fd4\u3059\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u30ef\u30f3\u30e9\u30a4\u30ca\u30fc\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u6f14\u7b97\u5b50\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u6570\u884c\u306e\u51e6\u7406\u30921\u884c\u3067\u8868\u73fe\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=\"\"># \u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\ndef status_message(user)\n  user&amp;.active? ? \"Active\" : \"Inactive\"\nend\n\n# \u8ad6\u7406\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u77ed\u7d61\u8a55\u4fa1\ndef find_user(id)\n  cache.get(id) || database.fetch(id) || create_default_user\nend\n\n# \u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u4f7f\u3063\u305f\u5024\u306e\u62bd\u51fa\ndef extract_city(data)\n  data in { address: { city: String =&gt; city } } ? city : \"Unknown\"\nend\n\n# \u7bc4\u56f2\u6f14\u7b97\u5b50\u3068inject\uff08reduce\uff09\u306e\u7d44\u307f\u5408\u308f\u305b\nfactorial = -&gt;(n) { (1..n).inject(:*) || 1 }\nputs factorial[5]  # 120<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u6f14\u7b97\u5b50\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u306b\u3088\u308b\u30ab\u30b9\u30bf\u30de\u30a4\u30ba<\/h3>\n\n\n\n<p>\u30ab\u30b9\u30bf\u30e0\u30af\u30e9\u30b9\u3067\u6f14\u7b97\u5b50\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u3053\u3068\u3067\u3001\u76f4\u611f\u7684\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u73fe\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=\"\">class Vector\n  attr_reader :x, :y\n\n  def initialize(x, y)\n    @x = x\n    @y = y\n  end\n\n  # \u52a0\u7b97\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\n  def +(other)\n    Vector.new(@x + other.x, @y + other.y)\n  end\n\n  # \u4e57\u7b97\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\uff08\u30b9\u30ab\u30e9\u30fc\u500d\uff09\n  def *(scalar)\n    Vector.new(@x * scalar, @y * scalar)\n  end\n\n  # \u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\n  def &lt;=&gt;(other)\n    length &lt;=&gt; other.length\n  end\n\n  # \u7b49\u4fa1\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\n  def ==(other)\n    @x == other.x &amp;&amp; @y == other.y\n  end\n\n  def length\n    Math.sqrt(@x * @x + @y * @y)\n  end\n\n  def to_s\n    \"(#{@x}, #{@y})\"\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nv1 = Vector.new(1, 2)\nv2 = Vector.new(3, 4)\nputs v1 + v2          # (4, 6)\nputs v1 * 2          # (2, 4)\nputs v1 == v2        # false\nputs [v1, v2].sort   # \u9577\u3055\u3067\u30bd\u30fc\u30c8<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u904e\u5ea6\u306b\u7c21\u6f54\u306a\u8868\u73fe\u3092\u8ffd\u6c42\u3059\u308b\u3068\u53ef\u8aad\u6027\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u30c1\u30fc\u30e0\u306e\u7406\u89e3\u5ea6\u3084\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\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-16\">\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u6f14\u7b97\u5b50\u306e\u512a\u5148\u9806\u4f4d\u3092\u7406\u89e3\u3059\u308b<\/h3>\n\n\n\n<p>Ruby\u6f14\u7b97\u5b50\u306b\u306f\u660e\u78ba\u306a\u512a\u5148\u9806\u4f4d\u304c\u3042\u308a\u3001\u3053\u308c\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u6b63\u78ba\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u4e0a\u3067\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=\"\"># \u6f14\u7b97\u5b50\u306e\u512a\u5148\u9806\u4f4d\u306e\u4f8b\nresult = 2 + 3 * 4    # 14 (\u4e57\u7b97\u304c\u5148\u306b\u5b9f\u884c\u3055\u308c\u308b)\nresult = (2 + 3) * 4  # 20 (\u62ec\u5f27\u3092\u4f7f\u7528\u3057\u3066\u512a\u5148\u9806\u4f4d\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a)\n\n# \u3088\u304f\u3042\u308b\u9593\u9055\u3044\u306e\u4f8b\nif a &amp;&amp; b || c        # &amp;&amp;\u304c||\u3088\u308a\u512a\u5148\u3055\u308c\u308b\nif (a &amp;&amp; b) || c      # \u610f\u56f3\u3092\u660e\u78ba\u306b\u3059\u308b\u305f\u3081\u306b\u62ec\u5f27\u3092\u4f7f\u7528\n\n# \u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u9023\u9396\n# \u8aa4\u3063\u305f\u66f8\u304d\u65b9\nif x &gt; 5 &amp;&amp; x &lt; 10    # \u52d5\u4f5c\u3059\u308b\u304c\u5197\u9577\n# \u6b63\u3057\u3044\u66f8\u304d\u65b9\nif 5 &lt; x &amp;&amp; x &lt; 10    # \u3088\u308a\u660e\u78ba\n# \u3055\u3089\u306b\u826f\u3044\u66f8\u304d\u65b9\nif x.between?(5, 10)  # \u6700\u3082\u8aad\u307f\u3084\u3059\u3044<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u53ef\u8aad\u6027\u3092\u91cd\u8996\u3057\u305f\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u306f\u4fdd\u5b88\u6027\u306b\u76f4\u7d50\u3057\u307e\u3059\u3002\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u30c1\u30fc\u30e0\u30e1\u30f3\u30d0\u30fc\u304c\u7406\u89e3\u3057\u3084\u3059\u3044\u65b9\u6cd5\u3092\u9078\u629e\u3057\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=\"\"># \u4e09\u9805\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\n# \u8907\u96d1\u3059\u304e\u308b\u4f8b\uff08\u907f\u3051\u308b\u3079\u304d\uff09\nresult = condition1 ? value1 : condition2 ? value2 : condition3 ? value3 : default_value\n\n# \u3088\u308a\u8aad\u307f\u3084\u3059\u3044\u4f8b\nresult = if condition1\n          value1\n        elsif condition2\n          value2\n        elsif condition3\n          value3\n        else\n          default_value\n        end\n\n# \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u6539\u884c\n# \u8aad\u307f\u306b\u304f\u3044\u4f8b\nresult = array.map{|x|x*2}.select{|x|x&gt;10}.reduce(:+)\n\n# \u8aad\u307f\u3084\u3059\u3044\u4f8b\nresult = array\n  .map { |x| x * 2 }\n  .select { |x| x &gt; 10 }\n  .reduce(:+)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u6f14\u7b97\u5b50\u306e\u9078\u629e<\/h3>\n\n\n\n<p>\u6f14\u7b97\u5b50\u306e\u9078\u629e\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u3082\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u7279\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u306f\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=\"\"># \u6587\u5b57\u5217\u9023\u7d50\u306e\u4f8b\n# \u975e\u52b9\u7387\u306a\u65b9\u6cd5\nstring = \"\"\n1000.times { |i| string += i.to_s }  # \u6bce\u56de\u65b0\u3057\u3044\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u4f5c\u6210\u3055\u308c\u308b\n\n# \u52b9\u7387\u7684\u306a\u65b9\u6cd5\nstring = \"\"\nparts = []\n1000.times { |i| parts &lt;&lt; i.to_s }\nstring = parts.join  # \u4e00\u5ea6\u306b\u307e\u3068\u3081\u3066\u9023\u7d50\n\n# \u914d\u5217\u64cd\u4f5c\u306e\u6700\u9069\u5316\narray = (1..1000).to_a\n\n# \u975e\u52b9\u7387\u306a\u65b9\u6cd5\uff08\u914d\u5217\u3092\u4f55\u5ea6\u3082\u30b3\u30d4\u30fc\uff09\nresult = array\n  .map { |x| x * 2 }\n  .select { |x| x &gt; 1000 }\n  .map { |x| x.to_s }\n\n# \u52b9\u7387\u7684\u306a\u65b9\u6cd5\uff08\u4e00\u5ea6\u306e\u8d70\u67fb\u3067\u51e6\u7406\uff09\nresult = array.each_with_object([]) do |x, memo|\n  doubled = x * 2\n  memo &lt;&lt; doubled.to_s if doubled &gt; 1000\nend<\/pre>\n\n\n\n<p>\u6f14\u7b97\u5b50\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\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>\u660e\u793a\u7684\u306a\u512a\u5148\u9806\u4f4d<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u96d1\u306a\u5f0f\u3067\u306f\u62ec\u5f27\u3092\u4f7f\u7528\u3057\u3066\u610f\u56f3\u3092\u660e\u78ba\u306b<\/li>\n\n\n\n<li>\u6f14\u7b97\u5b50\u306e\u512a\u5148\u9806\u4f4d\u306b\u983c\u308a\u3059\u304e\u306a\u3044<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e00\u8cab\u6027\u306e\u3042\u308b\u66f8\u304d\u65b9<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5185\u3067\u7d71\u4e00\u3055\u308c\u305f\u8a18\u6cd5\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u30c1\u30fc\u30e0\u5185\u3067\u5408\u610f\u3055\u308c\u305f\u898f\u7d04\u306b\u5f93\u3046<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9069\u5207\u306a\u6539\u884c\u3068\u30a4\u30f3\u30c7\u30f3\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9577\u3044\u5f0f\u306f\u9069\u5207\u306b\u6539\u884c<\/li>\n\n\n\n<li>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306f\u898b\u3084\u3059\u304f\u6574\u5f62<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b7\u30f3\u30d7\u30eb\u3055\u306e\u91cd\u8996<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u96d1\u306a\u6f14\u7b97\u5b50\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u4e2d\u9593\u5909\u6570\u3092\u4f7f\u7528<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u539f\u5247\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u52b9\u7387\u7684\u306a\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-20\">\u3088\u304f\u3042\u308b\u30d0\u30b0\u3068\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u6f14\u7b97\u5b50\u4f7f\u7528\u6642\u306e\u4e00\u822c\u7684\u306a\u30df\u30b9\u3068\u5bfe\u7b56<\/h3>\n\n\n\n<p>\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\u306b\u95a2\u9023\u3059\u308b\u4e00\u822c\u7684\u306a\u30d0\u30b0\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fe1\u983c\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=\"\"># 1. nil\u5b89\u5168\u6027\u306e\u554f\u984c\n# \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\ndef full_name(user)\n  user.first_name + \" \" + user.last_name  # user\u304cnil\u306e\u5834\u5408\u306b\u30a8\u30e9\u30fc\nend\n\n# \u6539\u5584\u3055\u308c\u305f\u30b3\u30fc\u30c9\ndef full_name(user)\n  return \"Unknown\" unless user\n  \"#{user.first_name} #{user.last_name}\"\nend\n\n# \u3055\u3089\u306b\u6539\u5584\uff08\u307c\u3063\u3061\u6f14\u7b97\u5b50\u4f7f\u7528\uff09\ndef full_name(user)\n  \"#{user&amp;.first_name} #{user&amp;.last_name}\".strip\nend\n\n# 2. \u6570\u5024\u6f14\u7b97\u306e\u7cbe\u5ea6\u554f\u984c\n# \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\nresult = 0.1 + 0.2  # 0.30000000000000004\n\n# \u6539\u5584\u3055\u308c\u305f\u30b3\u30fc\u30c9\uff08BigDecimal\u3092\u4f7f\u7528\uff09\nrequire 'bigdecimal'\nresult = BigDecimal(\"0.1\") + BigDecimal(\"0.2\")  # 0.3\n\n# 3. \u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9\u306e\u554f\u984c\n# \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\nif user.role = \"admin\"  # \u4ee3\u5165\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u3057\u307e\u3063\u3066\u3044\u308b\n  grant_admin_access\nend\n\n# \u6539\u5584\u3055\u308c\u305f\u30b3\u30fc\u30c9\nif user.role == \"admin\"  # \u7b49\u5024\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\n  grant_admin_access\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u30c7\u30d0\u30c3\u30b0\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u30c7\u30d0\u30c3\u30b0\u6642\u306b\u306f\u9069\u5207\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u53d6\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=\"\"># \u30c7\u30d0\u30c3\u30b0\u7528\u306e\u30d8\u30eb\u30d1\u30fc\u30e1\u30bd\u30c3\u30c9\ndef debug_value(value)\n  puts \"Class: #{value.class}\"\n  puts \"Value: #{value.inspect}\"\n  puts \"Object ID: #{value.object_id}\"\n  value  # \u5024\u3092\u305d\u306e\u307e\u307e\u8fd4\u3059\nend\n\n# \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u30c7\u30d0\u30c3\u30b0\nresult = [1, 2, 3, 4, 5]\n  .tap { |arr| puts \"Original: #{arr.inspect}\" }\n  .map { |n| n * 2 }\n  .tap { |arr| puts \"After map: #{arr.inspect}\" }\n  .select { |n| n &gt; 5 }\n  .tap { |arr| puts \"After select: #{arr.inspect}\" }\n\n# \u6761\u4ef6\u5f0f\u306e\u30c7\u30d0\u30c3\u30b0\ndef debug_condition(condition)\n  result = condition\n  puts \"Condition evaluated to: #{result.inspect}\"\n  result\nend\n\nif debug_condition(user&amp;.admin? &amp;&amp; user&amp;.active?)\n  perform_admin_action\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u3067\u306e\u6f14\u7b97\u306e\u6271\u3044\u65b9<\/h3>\n\n\n\n<p>\u6f14\u7b97\u5b50\u306e\u52d5\u4f5c\u3092\u78ba\u5b9f\u306b\u3059\u308b\u305f\u3081\u306e\u30c6\u30b9\u30c8\u306e\u66f8\u304d\u65b9\u3092\u7406\u89e3\u3059\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=\"\">require 'minitest\/autorun'\n\nclass CalculatorTest &lt; Minitest::Test\n  def setup\n    @calculator = Calculator.new\n  end\n\n  # \u57fa\u672c\u7684\u306a\u6f14\u7b97\u306e\u30c6\u30b9\u30c8\n  def test_addition\n    assert_equal 4, @calculator.add(2, 2)\n    assert_equal 0, @calculator.add(-2, 2)\n    assert_equal 0.3, @calculator.add(0.1, 0.2).round(1)\n  end\n\n  # nil\u306e\u6271\u3044\u306e\u30c6\u30b9\u30c8\n  def test_nil_safety\n    result = @calculator.safe_divide(10, 0)\n    assert_nil result\n  end\n\n  # \u4f8b\u5916\u51e6\u7406\u306e\u30c6\u30b9\u30c8\n  def test_division_by_zero\n    assert_raises(ZeroDivisionError) do\n      @calculator.divide(10, 0)\n    end\n  end\n\n  # \u5883\u754c\u5024\u306e\u30c6\u30b9\u30c8\n  def test_comparison_edge_cases\n    assert @calculator.within_range?(5, 1, 10)\n    refute @calculator.within_range?(11, 1, 10)\n    assert @calculator.within_range?(1, 1, 10)\n    assert @calculator.within_range?(10, 1, 10)\n  end\nend<\/pre>\n\n\n\n<p>\u30c7\u30d0\u30c3\u30b0\u3068\u30c6\u30b9\u30c8\u306e\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d0\u30b0\u306e\u767a\u898b\u3068\u4fee\u6b63<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u6ce8\u610f\u6df1\u304f\u8aad\u3080<\/li>\n\n\n\n<li>\u30c7\u30d0\u30c3\u30ac\u30fc\u3092\u6d3b\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u5024\u306e\u578b\u3068\u72b6\u614b\u3092\u78ba\u8a8d\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u306e\u4f5c\u6210<\/li>\n<\/ol>\n\n\n\n<ul 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