{"id":1562,"date":"2025-03-24T08:50:24","date_gmt":"2025-03-23T23:50:24","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1562"},"modified":"2025-03-24T08:50:24","modified_gmt":"2025-03-23T23:50:24","slug":"%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91ruby%e5%88%9d%e5%bf%83%e8%80%85%e3%81%a7%e3%82%82%e3%82%8f%e3%81%8b%e3%82%8b%ef%bc%81%e5%a4%89%e6%95%b0%e3%81%ae%e5%9f%ba%e7%a4%8e%e3%81%8b%e3%82%89","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1562","title":{"rendered":"\u3010\u4fdd\u5b58\u7248\u3011Ruby\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\uff01\u5909\u6570\u306e\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u307e\u3067\u5b8c\u5168\u89e3\u8aac"},"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\u5909\u6570\u3068\u306f\uff1f \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u521d\u5fc3\u8005\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u5909\u6570\u3068\u306f\u30c7\u30fc\u30bf\u3092\u5165\u308c\u308b\u7bb1\u3067\u3042\u308b<\/a>      <\/li>      <li>        <a href=\"#i-2\">\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u5909\u6570\u304c\u5fc5\u8981\u306a\u7406\u7531<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">Ruby \u306e\u5909\u6570\u306e\u7279\u5fb4<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">Ruby \u3067\u4f7f\u3048\u308b\u5909\u6570\u306e\u7a2e\u985e\u3092\u5fb9\u5e95\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u57fa\u672c\u3068\u4f7f\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3067\u72b6\u614b\u3092\u4fdd\u6301\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-7\">\u30af\u30e9\u30b9\u5909\u6570\u306e\u5f79\u5272\u3068\u4f7f\u7528\u30b7\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-8\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u7279\u5fb4\u3068\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">Ruby \u5909\u6570\u306e\u547d\u540d\u898f\u5247\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">\u5909\u6570\u540d\u306b\u4f7f\u3048\u308b\u6587\u5b57\u3068\u4f7f\u3048\u306a\u3044\u6587\u5b57<\/a>      <\/li>      <li>        <a href=\"#i-11\">Ruby\u958b\u767a\u8005\u306b\u63a8\u5968\u3055\u308c\u308b\u547d\u540d\u898f\u5247<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">\u76f4\u611f\u7684\u306b\u5909\u6570\u540d\u3092\u3064\u3051\u308b\u30b3\u30c4<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-13\">\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u7406\u89e3\u3057\u3088\u3046<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-14\">\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3068\u306f\u4f55\u304b<\/a>      <\/li>      <li>        <a href=\"#i-15\">\u5404\u7a2e\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306e\u9055\u3044<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">\u30b9\u30b3\u30fc\u30d7\u306b\u3088\u308b\u3088\u304f\u3042\u308b\u30d0\u30b0\u3068\u5bfe\u51e6\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-17\">\u5b9f\u8df5\u7684\u306a\u5909\u6570\u306e\u4f7f\u3044\u65b9\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-18\">\u591a\u91cd\u4ee3\u5165\u3067\u52b9\u7387\u7684\u306b\u30b3\u30fc\u30c9\u3092\u66f8\u304f<\/a>      <\/li>      <li>        <a href=\"#i-19\">\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u3068\u5909\u6570\u306e\u95a2\u4fc2<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-20\">\u5909\u6570\u5c55\u958b\u3092\u6d3b\u7528\u3057\u305f\u6587\u5b57\u5217\u64cd\u4f5c<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-21\">\u5909\u6570\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9\u3068\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-22\">\u672a\u5b9a\u7fa9\u5909\u6570\u306e\u30a8\u30e9\u30fc\u3092\u9632\u3050<\/a>      <\/li>      <li>        <a href=\"#i-23\">\u5909\u6570\u306e\u5024\u3092\u78ba\u8a8d\u3059\u308b\u30c7\u30d0\u30c3\u30b0\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-24\">\u5909\u6570\u95a2\u9023\u306e\u4e3b\u8981\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8<\/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\u5909\u6570\u3068\u306f\uff1f \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u521d\u5fc3\u8005\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u5909\u6570\u3068\u306f\u30c7\u30fc\u30bf\u3092\u5165\u308c\u308b\u7bb1\u3067\u3042\u308b<\/h3>\n\n\n\n<p>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u5909\u6570\u306f\u3001\u30c7\u30fc\u30bf\u3092\u4e00\u6642\u7684\u306b\u4fdd\u5b58\u3057\u3066\u304a\u304f\u300c\u7bb1\u300d\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002\u3053\u306e\u7bb1\u306b\u306f\u6570\u5024\u3001\u6587\u5b57\u5217\u3001\u914d\u5217\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u7a2e\u985e\u306e\u30c7\u30fc\u30bf\u3092\u5165\u308c\u308b\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=\"\"># \u5909\u6570\u306b\u30c7\u30fc\u30bf\u3092\u4ee3\u5165\u3059\u308b\u57fa\u672c\u7684\u306a\u4f8b\nname = \"\u5c71\u7530\u592a\u90ce\"    # \u6587\u5b57\u5217\u3092\u4fdd\u5b58\nage = 25           # \u6570\u5024\u3092\u4fdd\u5b58\nis_student = true  # \u771f\u507d\u5024\u3092\u4fdd\u5b58<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u5909\u6570\u304c\u5fc5\u8981\u306a\u7406\u7531<\/h3>\n\n\n\n<p>\u5909\u6570\u306f\u4ee5\u4e0b\u306e\u7406\u7531\u3067\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u4e0d\u53ef\u6b20\u306a\u8981\u7d20\u3068\u306a\u3063\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u306e\u518d\u5229\u7528<\/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=\"\"># \u5909\u6570\u3092\u4f7f\u308f\u306a\u3044\u5834\u5408\nputs \"\u3053\u3093\u306b\u3061\u306f\u3001\u5c71\u7530\u592a\u90ce\u3055\u3093\"\nputs \"\u5c71\u7530\u592a\u90ce\u3055\u3093\u306e\u5e74\u9f62\u306f25\u6b73\u3067\u3059\"\n\n# \u5909\u6570\u3092\u4f7f\u3046\u5834\u5408\nname = \"\u5c71\u7530\u592a\u90ce\"\nage = 25\nputs \"\u3053\u3093\u306b\u3061\u306f\u3001#{name}\u3055\u3093\"\nputs \"#{name}\u3055\u3093\u306e\u5e74\u9f62\u306f#{age}\u6b73\u3067\u3059\"<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u5024\u306e\u5909\u66f4\u304c\u5bb9\u6613<\/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=\"\"># \u5546\u54c1\u306e\u4fa1\u683c\u8a08\u7b97\nprice = 1000\ntax_rate = 0.1\ntotal = price * (1 + tax_rate)\n\n# \u7a0e\u7387\u304c\u5909\u66f4\u306b\u306a\u3063\u305f\u5834\u5408\u3001tax_rate\u306e\u5024\u3092\u5909\u66f4\u3059\u308b\u3060\u3051\u3067\u6e08\u3080\ntax_rate = 0.08\ntotal = price * (1 + tax_rate)<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a<\/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=\"\"># \u5909\u6570\u540d\u3067\u51e6\u7406\u306e\u610f\u56f3\u3092\u660e\u78ba\u306b\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\nuser_age = 25\nis_adult = user_age &gt;= 20\nputs is_adult ? \"\u6210\u4eba\u3067\u3059\" : \"\u672a\u6210\u5e74\u3067\u3059\"<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">Ruby \u306e\u5909\u6570\u306e\u7279\u5fb4<\/h3>\n\n\n\n<p>Ruby\u306e\u5909\u6570\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u52d5\u7684\u578b\u4ed8\u3051<\/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=\"\"># \u540c\u3058\u5909\u6570\u306b\u7570\u306a\u308b\u578b\u306e\u30c7\u30fc\u30bf\u3092\u4ee3\u5165\u3067\u304d\u308b\nvariable = \"\u6587\u5b57\u5217\"\nvariable = 100\nvariable = [1, 2, 3]<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30b9\u30cd\u30fc\u30af\u30b1\u30fc\u30b9\u306e\u547d\u540d\u898f\u5247<\/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=\"\">first_name = \"\u592a\u90ce\"    # \u63a8\u5968\u3055\u308c\u308b\u547d\u540d\u6cd5\nfirstName = \"\u592a\u90ce\"     # Ruby\u3067\u306f\u63a8\u5968\u3055\u308c\u306a\u3044\u547d\u540d\u6cd5<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u5024\u306e\u53c2\u7167\u3068\u5909\u66f4\u304c\u7c21\u5358<\/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=\"\"># \u5909\u6570\u306e\u5024\u3092\u5225\u306e\u5909\u6570\u306b\u4ee3\u5165\noriginal_value = 100\ncopied_value = original_value\n\n# \u6f14\u7b97\u7d50\u679c\u3092\u5909\u6570\u306b\u4ee3\u5165\nresult = original_value + 50<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li>\u5909\u6570\u5c55\u958b\u6a5f\u80fd<\/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=\"\">name = \"Ruby\"\nputs \"Hello, #{name}!\"  # \u6587\u5b57\u5217\u5185\u3067\u5909\u6570\u306e\u5024\u3092\u5c55\u958b\u3067\u304d\u308b<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001Ruby\u306e\u5909\u6570\u30b7\u30b9\u30c6\u30e0\u306f\u521d\u5fc3\u8005\u306b\u3082\u6271\u3044\u3084\u3059\u304f\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u578b\u3092\u610f\u8b58\u3059\u308b\u5fc5\u8981\u304c\u5c11\u306a\u304f\u3001\u76f4\u611f\u7684\u306b\u4f7f\u3048\u308b\u3053\u3068\u304c\u7279\u5fb4\u3067\u3059\u3002\u5909\u6570\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">Ruby \u3067\u4f7f\u3048\u308b\u5909\u6570\u306e\u7a2e\u985e\u3092\u5fb9\u5e95\u89e3\u8aac<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u57fa\u672c\u3068\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306f\u6700\u3082\u57fa\u672c\u7684\u306a\u5909\u6570\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u3084\u30d6\u30ed\u30c3\u30af\u5185\u3067\u306e\u307f\u6709\u52b9\u306a\u5909\u6570\u3067\u3059\u3002\u5c0f\u6587\u5b57\u307e\u305f\u306f\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u3067\u59cb\u307e\u308b\u5fc5\u8981\u304c\u3042\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=\"\">def calculate_total\n  # price \u3068 tax_rate \u306f\u30ed\u30fc\u30ab\u30eb\u5909\u6570\n  price = 1000\n  tax_rate = 0.1\n\n  # \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306f\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u306e\u307f\u4f7f\u7528\u53ef\u80fd\n  total = price * (1 + tax_rate)\n\n  return total\nend\n\n# \u30e1\u30bd\u30c3\u30c9\u306e\u5916\u3067\u306f price \u3084 tax_rate \u306f\u4f7f\u7528\u3067\u304d\u306a\u3044\n# puts price  # =&gt; undefined local variable error<\/pre>\n\n\n\n<p>\u30d6\u30ed\u30c3\u30af\u5185\u3067\u306e\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u4f7f\u7528\u4f8b\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=\"\">[1, 2, 3].each do |number|\n  # number \u306f\u30d6\u30ed\u30c3\u30af\u30ed\u30fc\u30ab\u30eb\u5909\u6570\n  squared = number * number  # squared \u3082\u30ed\u30fc\u30ab\u30eb\u5909\u6570\n  puts squared\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3067\u72b6\u614b\u3092\u4fdd\u6301\u3059\u308b<\/h3>\n\n\n\n<p>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306f\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3054\u3068\u306b\u56fa\u6709\u306e\u5024\u3092\u4fdd\u6301\u3067\u304d\u308b\u5909\u6570\u3067\u3059\u3002@\u3067\u59cb\u307e\u308b\u540d\u524d\u3092\u6301\u3061\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 User\n  def initialize(name, age)\n    # @name \u3068 @age \u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\n    @name = name\n    @age = age\n  end\n\n  def introduce\n    # \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306f\u30af\u30e9\u30b9\u5185\u306e\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n    puts \"\u79c1\u306e\u540d\u524d\u306f#{@name}\u3067\u3001#{@age}\u6b73\u3067\u3059\u3002\"\n  end\n\n  # \u30a2\u30af\u30bb\u30b5\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u4f8b\n  attr_reader :name, :age  # \u8aad\u307f\u53d6\u308a\u5c02\u7528\u306e\u30a2\u30af\u30bb\u30b5\u3092\u5b9a\u7fa9\nend\n\nuser = User.new(\"\u7530\u4e2d\", 25)\nuser.introduce  # =&gt; \"\u79c1\u306e\u540d\u524d\u306f\u7530\u4e2d\u3067\u300125\u6b73\u3067\u3059\u3002\"\nputs user.name  # =&gt; \"\u7530\u4e2d\"<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30af\u30e9\u30b9\u5909\u6570\u306e\u5f79\u5272\u3068\u4f7f\u7528\u30b7\u30fc\u30f3<\/h3>\n\n\n\n<p>\u30af\u30e9\u30b9\u5909\u6570\u306f\u3001\u30af\u30e9\u30b9\u5168\u4f53\u3067\u5171\u6709\u3055\u308c\u308b\u5909\u6570\u3067\u3059\u3002@@\u3067\u59cb\u307e\u308b\u540d\u524d\u3092\u6301\u3061\u3001\u5168\u3066\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u9593\u3067\u5024\u3092\u5171\u6709\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=\"\">class BankAccount\n  # \u30af\u30e9\u30b9\u5909\u6570\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6570\u3092\u7ba1\u7406\n  @@account_count = 0\n\n  def initialize(balance)\n    @balance = balance\n    @@account_count += 1\n  end\n\n  def self.total_accounts\n    puts \"\u73fe\u5728\u306e\u53e3\u5ea7\u6570: #{@@account_count}\"\n  end\nend\n\naccount1 = BankAccount.new(1000)\naccount2 = BankAccount.new(2000)\nBankAccount.total_accounts  # =&gt; \"\u73fe\u5728\u306e\u53e3\u5ea7\u6570: 2\"<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u7279\u5fb4\u3068\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u3069\u3053\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u5909\u6570\u3067\u3059\u3002$\u3067\u59cb\u307e\u308b\u540d\u524d\u3092\u6301\u3061\u307e\u3059\u304c\u3001\u4f7f\u7528\u306f\u63a8\u5968\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u5b9a\u7fa9\n$app_name = \"Ruby Sample App\"\n$debug_mode = true\n\ndef print_app_info\n  # \u3069\u3053\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n  puts \"\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u540d: #{$app_name}\"\nend\n\nclass Configuration\n  def show_debug_status\n    # \u5225\u306e\u30af\u30e9\u30b9\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n    puts \"\u30c7\u30d0\u30c3\u30b0\u30e2\u30fc\u30c9: #{$debug_mode}\"\n  end\nend\n\nprint_app_info\nconfig = Configuration.new\nconfig.show_debug_status<\/pre>\n\n\n\n<p>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u4fdd\u5b88\u6027\u304c\u4f4e\u4e0b\u3059\u308b<\/li>\n\n\n\n<li>\u4e88\u671f\u305b\u306c\u526f\u4f5c\u7528\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u304c\u56f0\u96e3\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u4ee3\u308f\u308a\u306b\u30af\u30e9\u30b9\u5909\u6570\u3084\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u63a8\u5968<\/li>\n<\/ol>\n\n\n\n<p>\u5909\u6570\u306e\u7a2e\u985e\u3054\u3068\u306e\u7279\u5fb4\u307e\u3068\u3081\uff1a<\/p>\n\n\n<div id=\"id-d26034f9-c018-4ca9-b0e9-588ff21b0c6a\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5909\u6570\u306e\u7a2e\u985e<\/th><th>\u958b\u59cb\u6587\u5b57<\/th><th>\u30b9\u30b3\u30fc\u30d7<\/th><th>\u4e3b\u306a\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td>\u30ed\u30fc\u30ab\u30eb\u5909\u6570<\/td><td>\u5c0f\u6587\u5b57\/_<\/td><td>\u30e1\u30bd\u30c3\u30c9\u5185<\/td><td>\u4e00\u6642\u7684\u306a\u30c7\u30fc\u30bf\u4fdd\u6301<\/td><\/tr><tr><td>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/td><td>@<\/td><td>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5185<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u7ba1\u7406<\/td><\/tr><tr><td>\u30af\u30e9\u30b9\u5909\u6570<\/td><td>@@<\/td><td>\u30af\u30e9\u30b9\u5168\u4f53<\/td><td>\u30af\u30e9\u30b9\u5168\u4f53\u3067\u306e\u60c5\u5831\u5171\u6709<\/td><\/tr><tr><td>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570<\/td><td>$<\/td><td>\u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53<\/td><td>\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u8a2d\u5b9a\uff08\u975e\u63a8\u5968\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u5909\u6570\u3092\u305d\u308c\u305e\u308c\u306e\u7279\u6027\u3092\u7406\u89e3\u3057\u305f\u4e0a\u3067\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-9\">Ruby \u5909\u6570\u306e\u547d\u540d\u898f\u5247\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u5909\u6570\u540d\u306b\u4f7f\u3048\u308b\u6587\u5b57\u3068\u4f7f\u3048\u306a\u3044\u6587\u5b57<\/h3>\n\n\n\n<p>Ruby\u306e\u5909\u6570\u540d\u306b\u306f\u4ee5\u4e0b\u306e\u898f\u5247\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<p>\u4f7f\u7528\u53ef\u80fd\u306a\u6587\u5b57\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u82f1\u5c0f\u6587\u5b57(a-z)<\/li>\n\n\n\n<li>\u6570\u5b57(0-9)<\/li>\n\n\n\n<li>\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2(_)<\/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=\"\"># \u6b63\u3057\u3044\u5909\u6570\u540d\u306e\u4f8b\nuser_name = \"\u7530\u4e2d\"\nage2 = 25\n_temporary_value = 100\n\n# \u8aa4\u3063\u305f\u5909\u6570\u540d\u306e\u4f8b\n2nd_user = \"\u9234\u6728\"    # \u6570\u5b57\u3067\u59cb\u307e\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\nuser-name = \"\u4f50\u85e4\"   # \u30cf\u30a4\u30d5\u30f3\u306f\u4f7f\u7528\u3067\u304d\u306a\u3044\nUser = \"\u5c71\u7530\"        # \u5927\u6587\u5b57\u3067\u59cb\u307e\u308b\u3068Constant\u3068\u3057\u3066\u6271\u308f\u308c\u308b<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">Ruby\u958b\u767a\u8005\u306b\u63a8\u5968\u3055\u308c\u308b\u547d\u540d\u898f\u5247<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b9\u30cd\u30fc\u30af\u30b1\u30fc\u30b9\u306e\u4f7f\u7528<\/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=\"\"># \u63a8\u5968\u3055\u308c\u308b\u547d\u540d\u30b9\u30bf\u30a4\u30eb\nfirst_name = \"\u592a\u90ce\"\nlast_login_date = Time.now\nuser_age = 25\n\n# \u907f\u3051\u308b\u3079\u304d\u547d\u540d\u30b9\u30bf\u30a4\u30eb\uff08\u30ad\u30e3\u30e1\u30eb\u30b1\u30fc\u30b9\uff09\nfirstName = \"\u592a\u90ce\"\nlastLoginDate = Time.now\nuserAge = 25<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u610f\u5473\u3092\u660e\u78ba\u306b\u8868\u73fe<\/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=\"\"># \u826f\u3044\u4f8b\uff1a\u610f\u5473\u304c\u660e\u78ba\nuser_count = users.length\nis_valid = validate_user(user)\ncurrent_time = Time.now\n\n# \u60aa\u3044\u4f8b\uff1a\u610f\u5473\u304c\u4e0d\u660e\u78ba\nn = users.length\nflg = validate_user(user)\nt = Time.now<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u76f4\u611f\u7684\u306b\u5909\u6570\u540d\u3092\u3064\u3051\u308b\u30b3\u30c4<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5177\u4f53\u7684\u306a\u540d\u8a5e\u3092\u4f7f\u7528\u3059\u308b<\/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=\"\"># \u826f\u3044\u4f8b\uff1a\u5177\u4f53\u7684\u306a\u540d\u524d\ntotal_price = 1000\nuser_email = \"example@example.com\"\nemployee_salary = 300000\n\n# \u60aa\u3044\u4f8b\uff1a\u62bd\u8c61\u7684\u306a\u540d\u524d\ndata = 1000\nstr = \"example@example.com\"\nnum = 300000<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u771f\u507d\u5024\u3092\u8868\u3059\u5909\u6570\u306f\u7591\u554f\u5f62\u3067<\/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=\"\"># \u826f\u3044\u4f8b\uff1a\u771f\u507d\u5024\u3092\u8868\u3059\u547d\u540d\nis_admin = true\nhas_permission = false\ncan_edit = true\n\n# \u60aa\u3044\u4f8b\uff1a\u771f\u507d\u5024\u304c\u5206\u304b\u308a\u306b\u304f\u3044\nadmin = true\npermission = false\nedit = true<\/pre>\n\n\n\n<p>\u547d\u540d\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u307e\u3068\u3081\uff1a<\/p>\n\n\n<div id=\"id-bb8f52d7-ed46-4a4d-8b19-df51b25a2cb2\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30ab\u30c6\u30b4\u30ea<\/th><th>\u63a8\u5968\u30d1\u30bf\u30fc\u30f3<\/th><th>\u907f\u3051\u308b\u3079\u304d\u30d1\u30bf\u30fc\u30f3<\/th><th>\u7406\u7531<\/th><\/tr><\/thead><tbody><tr><td>\u5f62\u5f0f<\/td><td>snake_case<\/td><td>camelCase<\/td><td>Ruby\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u306b\u6e96\u62e0<\/td><\/tr><tr><td>\u9577\u3055<\/td><td>\u9069\u5ea6\u306a\u9577\u3055\u3067\u610f\u5473\u304c\u660e\u78ba<\/td><td>\u6975\u7aef\u306b\u77ed\u3044or\u9577\u3044<\/td><td>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u78ba\u4fdd<\/td><\/tr><tr><td>\u8868\u73fe<\/td><td>\u5177\u4f53\u7684\u306a\u540d\u8a5e\u3084\u52d5\u8a5e<\/td><td>\u62bd\u8c61\u7684\u306a\u5358\u8a9e\u3084\u7565\u8a9e<\/td><td>\u610f\u56f3\u304c\u660e\u78ba\u306b\u4f1d\u308f\u308b<\/td><\/tr><tr><td>\u7279\u6b8a\u6587\u5b57<\/td><td>\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u306e\u307f<\/td><td>\u30cf\u30a4\u30d5\u30f3\u3084\u7279\u6b8a\u8a18\u53f7<\/td><td>\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u30a8\u30e9\u30fc\u3092\u9632\u3050<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u826f\u3044\u5909\u6570\u540d\u306e\u7279\u5fb4\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u76ee\u7684\u304c\u660e\u78ba\u306b\u5206\u304b\u308b<\/li>\n\n\n\n<li>\u767a\u97f3\u3057\u3084\u3059\u304f\u8a18\u61b6\u3057\u3084\u3059\u3044<\/li>\n\n\n\n<li>\u691c\u7d22\u3057\u3084\u3059\u3044<\/li>\n\n\n\n<li>\u8aa4\u89e3\u3092\u62db\u304b\u306a\u3044<\/li>\n\n\n\n<li>\u30c1\u30fc\u30e0\u5185\u3067\u4e00\u8cab\u6027\u304c\u3042\u308b<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u898f\u5247\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u3001\u30c1\u30fc\u30e0\u958b\u767a\u304c\u30b9\u30e0\u30fc\u30ba\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-13\">\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u7406\u89e3\u3057\u3088\u3046<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3068\u306f\u4f55\u304b<\/h3>\n\n\n\n<p>\u30b9\u30b3\u30fc\u30d7\u3068\u306f\u3001\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u7bc4\u56f2\u306e\u3053\u3068\u3067\u3059\u3002Ruby\u3067\u306f\u3001\u5909\u6570\u306e\u7a2e\u985e\u306b\u3088\u3063\u3066\u30b9\u30b3\u30fc\u30d7\u304c\u7570\u306a\u308a\u3001\u3053\u308c\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u30d0\u30b0\u306e\u9632\u6b62\u3068\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u304c\u53ef\u80fd\u306b\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=\"\">def example_method\n  local_variable = \"\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u306e\u307f\u6709\u52b9\"\nend\n\n# \u30e1\u30bd\u30c3\u30c9\u306e\u5916\u3067\u306flocal_variable\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\n# puts local_variable  # =&gt; NameError<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u5404\u7a2e\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306e\u9055\u3044<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/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=\"\">def outer_method\n  outer_local = \"\u5916\u5074\u306e\u30e1\u30bd\u30c3\u30c9\"\n\n  def inner_method\n    inner_local = \"\u5185\u5074\u306e\u30e1\u30bd\u30c3\u30c9\"\n    # outer_local \u306f\u53c2\u7167\u3067\u304d\u306a\u3044\n  end\n\n  # inner_local \u306f\u53c2\u7167\u3067\u304d\u306a\u3044\nend\n\n# \u30e1\u30bd\u30c3\u30c9\u5185\u3067\u5b9a\u7fa9\u3057\u305f\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306f\u3001\u305d\u306e\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u306e\u307f\u6709\u52b9<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30d6\u30ed\u30c3\u30af\u30b9\u30b3\u30fc\u30d7<\/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=\"\">outside_block = \"\u30d6\u30ed\u30c3\u30af\u5916\"\n\n[1, 2, 3].each do |number|\n  inside_block = \"\u30d6\u30ed\u30c3\u30af\u5185\"\n  puts outside_block  # \u30d6\u30ed\u30c3\u30af\u5916\u306e\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\nend\n\n# puts inside_block  # \u30d6\u30ed\u30c3\u30af\u5185\u306e\u5909\u6570\u306b\u306f\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/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=\"\">class User\n  def initialize(name)\n    @name = name  # \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\n  end\n\n  def display_name\n    puts @name    # \u30af\u30e9\u30b9\u5185\u306e\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n  end\n\n  def update_name(new_name)\n    @name = new_name  # \u540c\u3058\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5185\u3067\u5024\u3092\u5171\u6709\n  end\nend<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li>\u30af\u30e9\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/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=\"\">class Parent\n  @@class_variable = \"\u89aa\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\"\n\n  def self.show_class_variable\n    puts @@class_variable\n  end\nend\n\nclass Child &lt; Parent\n  def self.modify_class_variable\n    @@class_variable = \"\u5b50\u30af\u30e9\u30b9\u3067\u5909\u66f4\"  # \u7d99\u627f\u5148\u3067\u3082\u5171\u6709\u3055\u308c\u308b\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30b9\u30b3\u30fc\u30d7\u306b\u3088\u308b\u3088\u304f\u3042\u308b\u30d0\u30b0\u3068\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d6\u30ed\u30c3\u30af\u30b9\u30b3\u30fc\u30d7\u306e\u554f\u984c<\/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=\"\"># \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\ndef process_data\n  result = nil\n  [1, 2, 3].each do |num|\n    result = num * 2\n  end\n  result  # nil\u306b\u306a\u308b\u3053\u3068\u3092\u610f\u56f3\u3057\u3066\u3044\u306a\u3044\nend\n\n# \u4fee\u6b63\u5f8c\u306e\u30b3\u30fc\u30c9\ndef process_data\n  result = []  # \u914d\u5217\u3068\u3057\u3066\u521d\u671f\u5316\n  [1, 2, 3].each do |num|\n    result &lt;&lt; num * 2\n  end\n  result  # [2, 4, 6] \u304c\u8fd4\u308b\nend<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u521d\u671f\u5316\u5fd8\u308c<\/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=\"\"># \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\nclass Product\n  def price_with_tax\n    @price * 1.1  # @price\u304c\u672a\u521d\u671f\u5316\n  end\nend\n\n# \u4fee\u6b63\u5f8c\u306e\u30b3\u30fc\u30c9\nclass Product\n  def initialize\n    @price = 0  # \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\n  end\n\n  def price_with_tax\n    @price * 1.1\n  end\nend<\/pre>\n\n\n\n<p>\u30b9\u30b3\u30fc\u30d7\u95a2\u9023\u306e\u554f\u984c\u3092\u9632\u3050\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff1a<\/p>\n\n\n<div id=\"id-12e7939c-6ab3-48ab-b949-ea82a9923341\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u78ba\u8a8d\u9805\u76ee<\/th><th>\u5bfe\u7b56<\/th><\/tr><\/thead><tbody><tr><td>\u5909\u6570\u306e\u521d\u671f\u5316<\/td><td>\u30e1\u30bd\u30c3\u30c9\u3084\u30d6\u30ed\u30c3\u30af\u306e\u5148\u982d\u3067\u5fc5\u305a\u521d\u671f\u5316\u3059\u308b<\/td><\/tr><tr><td>\u30b9\u30b3\u30fc\u30d7\u306e\u7bc4\u56f2<\/td><td>\u5909\u6570\u3092\u4f7f\u3046\u7bc4\u56f2\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b<\/td><\/tr><tr><td>\u540d\u524d\u306e\u91cd\u8907<\/td><td>\u7570\u306a\u308b\u30b9\u30b3\u30fc\u30d7\u3067\u540c\u3058\u5909\u6570\u540d\u3092\u907f\u3051\u308b<\/td><\/tr><tr><td>\u5024\u306e\u5171\u6709<\/td><td>\u5fc5\u8981\u306a\u5834\u5408\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u30b9\u30b3\u30fc\u30d7\u30eb\u30fc\u30eb\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u5bfe\u51e6\u3059\u308b\u3053\u3068\u3067\u3001\u4e88\u671f\u305b\u306c\u30d0\u30b0\u3092\u9632\u304e\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-17\">\u5b9f\u8df5\u7684\u306a\u5909\u6570\u306e\u4f7f\u3044\u65b9\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u591a\u91cd\u4ee3\u5165\u3067\u52b9\u7387\u7684\u306b\u30b3\u30fc\u30c9\u3092\u66f8\u304f<\/h3>\n\n\n\n<p>\u591a\u91cd\u4ee3\u5165\u306f\u3001\u8907\u6570\u306e\u5909\u6570\u306b\u540c\u6642\u306b\u5024\u3092\u4ee3\u5165\u3067\u304d\u308b\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u591a\u91cd\u4ee3\u5165<\/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\u4ee3\u5165\nfirst_name = \"\u592a\u90ce\"\nlast_name = \"\u5c71\u7530\"\n\n# \u591a\u91cd\u4ee3\u5165\u3092\u4f7f\u7528\nfirst_name, last_name = \"\u592a\u90ce\", \"\u5c71\u7530\"\n\n# \u914d\u5217\u306e\u8981\u7d20\u3092\u5909\u6570\u306b\u5c55\u958b\narray = [\"Ruby\", 2.7, true]\nlanguage, version, stable = array<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u5fdc\u7528\u7684\u306a\u4f7f\u3044\u65b9<\/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=\"\"># \u5024\u306e\u4ea4\u63db\na, b = 1, 2\na, b = b, a  # a\u3068b\u306e\u5024\u304c\u5165\u308c\u66ff\u308f\u308b\n\n# \u4f59\u3063\u305f\u8981\u7d20\u3092\u914d\u5217\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b\nfirst, *rest = [1, 2, 3, 4, 5]\nputs first  # =&gt; 1\nputs rest   # =&gt; [2, 3, 4, 5]\n\n# \u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3092\u8907\u6570\u306e\u5909\u6570\u3067\u53d7\u3051\u53d6\u308b\ndef user_info\n  [\"\u5c71\u7530\u592a\u90ce\", 25, \"\u6771\u4eac\"]\nend\n\nname, age, location = user_info<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u3068\u5909\u6570\u306e\u95a2\u4fc2<\/h3>\n\n\n\n<p>\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5185\u5bb9\u3092\u76f4\u63a5\u5909\u66f4\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u901a\u5e38\u3001\u672b\u5c3e\u306b\u300c!\u300d\u304c\u3064\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=\"\"># \u975e\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u306e\u4f8b\nstring = \"ruby\"\nuppercase = string.upcase\nputs string     # =&gt; \"ruby\"\uff08\u5143\u306e\u5024\u306f\u5909\u66f4\u3055\u308c\u306a\u3044\uff09\nputs uppercase  # =&gt; \"RUBY\"\n\n# \u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u306e\u4f8b\nstring = \"ruby\"\nstring.upcase!\nputs string     # =&gt; \"RUBY\"\uff08\u5143\u306e\u5024\u304c\u5909\u66f4\u3055\u308c\u308b\uff09\n\n# \u914d\u5217\u3067\u306e\u4f8b\nnumbers = [1, 2, 3]\nnumbers.sort!   # \u5143\u306e\u914d\u5217\u3092\u76f4\u63a5\u30bd\u30fc\u30c8\nnumbers.map! { |n| n * 2 }  # \u5143\u306e\u914d\u5217\u306e\u8981\u7d20\u3092\u76f4\u63a5\u5909\u66f4<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u5909\u6570\u5c55\u958b\u3092\u6d3b\u7528\u3057\u305f\u6587\u5b57\u5217\u64cd\u4f5c<\/h3>\n\n\n\n<p>\u6587\u5b57\u5217\u5185\u3067\u306e\u5909\u6570\u5c55\u958b\u306f\u3001Ruby\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u5909\u6570\u5c55\u958b<\/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=\"\">name = \"\u5c71\u7530\"\nage = 25\nputs \"#{name}\u3055\u3093\u306f#{age}\u6b73\u3067\u3059\"  # =&gt; \u5c71\u7530\u3055\u3093\u306f25\u6b73\u3067\u3059\n\n# \u5f0f\u306e\u8a55\u4fa1\u3082\u53ef\u80fd\nprice = 1000\ntax = 0.1\nputs \"\u7a0e\u8fbc\u4fa1\u683c\u306f#{price * (1 + tax)}\u5186\u3067\u3059\"<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u9ad8\u5ea6\u306a\u5909\u6570\u5c55\u958b\u30c6\u30af\u30cb\u30c3\u30af<\/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=\"\"># \u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u3092\u542b\u3081\u308b\nuser = \"yamada\"\nputs \"\u3088\u3046\u3053\u305d#{user.capitalize}\u3055\u3093\"  # =&gt; \u3088\u3046\u3053\u305dYamada\u3055\u3093\n\n# \u6761\u4ef6\u5206\u5c90\u3092\u542b\u3081\u308b\nage = 19\nputs \"\u3042\u306a\u305f\u306f#{age &gt;= 20 ? '\u6210\u4eba' : '\u672a\u6210\u5e74'}\u3067\u3059\"\n\n# \u914d\u5217\u306e\u64cd\u4f5c\u3092\u542b\u3081\u308b\nfruits = ['\u308a\u3093\u3054', '\u30d0\u30ca\u30ca', '\u30aa\u30ec\u30f3\u30b8']\nputs \"\u672c\u65e5\u306e\u30d5\u30eb\u30fc\u30c4: #{fruits.join('\u3001')}\"<\/pre>\n\n\n\n<p>\u5b9f\u8df5\u7684\u306a\u5909\u6570\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u8a2d\u5b9a<\/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=\"\">def greet(name = \"\u30b2\u30b9\u30c8\", time = Time.now)\n  period = case time.hour\n           when 5..11 then \"\u304a\u306f\u3088\u3046\"\n           when 12..17 then \"\u3053\u3093\u306b\u3061\u306f\"\n           else \"\u3053\u3093\u3070\u3093\u306f\"\n           end\n  \"#{period}\u3001#{name}\u3055\u3093\"\nend<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u6761\u4ef6\u5206\u5c90\u3067\u306e\u4e00\u6642\u5909\u6570\u6d3b\u7528<\/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=\"\">def process_user_status(user)\n  status = if user.active?\n            \"\u30a2\u30af\u30c6\u30a3\u30d6\"\n          elsif user.pending?\n            \"\u4fdd\u7559\u4e2d\"\n          else\n            \"\u7121\u52b9\"\n          end\n\n  \"\u30e6\u30fc\u30b6\u30fc\u30b9\u30c6\u30fc\u30bf\u30b9: #{status}\"\nend<\/pre>\n\n\n\n<p>\u5909\u6570\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af\u306e\u307e\u3068\u3081\uff1a<\/p>\n\n\n<div id=\"id-3f77014a-8f04-4d03-9d5c-9b827bd75646\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30c6\u30af\u30cb\u30c3\u30af<\/th><th>\u7528\u9014<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><\/tr><\/thead><tbody><tr><td>\u591a\u91cd\u4ee3\u5165<\/td><td>\u8907\u6570\u306e\u5024\u3092\u4e00\u5ea6\u306b\u4ee3\u5165<\/td><td>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u5316<\/td><\/tr><tr><td>\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u76f4\u63a5\u5909\u66f4<\/td><td>\u30e1\u30e2\u30ea\u52b9\u7387\u306e\u5411\u4e0a<\/td><\/tr><tr><td>\u5909\u6570\u5c55\u958b<\/td><td>\u6587\u5b57\u5217\u3078\u306e\u5024\u306e\u57cb\u3081\u8fbc\u307f<\/td><td>\u53ef\u8aad\u6027\u306e\u5411\u4e0a<\/td><\/tr><tr><td>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024<\/td><td>\u5f15\u6570\u306e\u521d\u671f\u5024\u8a2d\u5b9a<\/td><td>\u30b3\u30fc\u30c9\u306e\u5805\u7262\u6027\u5411\u4e0a<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\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<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-21\">\u5909\u6570\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9\u3068\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u672a\u5b9a\u7fa9\u5909\u6570\u306e\u30a8\u30e9\u30fc\u3092\u9632\u3050<\/h3>\n\n\n\n<p>\u672a\u5b9a\u7fa9\u5909\u6570\u306b\u3088\u308b\u30a8\u30e9\u30fc\u306f\u3001Ruby\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u554f\u984c\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5909\u6570\u306e\u521d\u671f\u5316\u3092\u78ba\u5b9f\u306b\u884c\u3046<\/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=\"\"># \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\ndef calculate_total(prices)\n  total += prices.sum  # total\u304c\u672a\u521d\u671f\u5316\nend\n\n# \u6b63\u3057\u3044\u30b3\u30fc\u30c9\ndef calculate_total(prices)\n  total = 0  # \u521d\u671f\u5316\u3092\u5fd8\u308c\u305a\u306b\n  total += prices.sum\nend<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u6761\u4ef6\u5206\u5c90\u3067\u306e\u521d\u671f\u5316\u6f0f\u308c\u3092\u9632\u3050<\/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=\"\"># \u5371\u967a\u306a\u30b3\u30fc\u30c9\ndef get_status(user)\n  if user.active?\n    status = \"\u30a2\u30af\u30c6\u30a3\u30d6\"\n  elsif user.pending?\n    status = \"\u4fdd\u7559\u4e2d\"\n  end\n  status  # else\u53e5\u304c\u306a\u3044\u5834\u5408\u3001status\u304c\u672a\u5b9a\u7fa9\u306e\u53ef\u80fd\u6027\u304c\u3042\u308b\nend\n\n# \u5b89\u5168\u306a\u30b3\u30fc\u30c9\ndef get_status(user)\n  status = \"\u4e0d\u660e\"  # \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\n  if user.active?\n    status = \"\u30a2\u30af\u30c6\u30a3\u30d6\"\n  elsif user.pending?\n    status = \"\u4fdd\u7559\u4e2d\"\n  end\n  status\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u5909\u6570\u306e\u5024\u3092\u78ba\u8a8d\u3059\u308b\u30c7\u30d0\u30c3\u30b0\u65b9\u6cd5<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>puts\/p\/pp\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u30c7\u30d0\u30c3\u30b0<\/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=\"\">def debug_example\n  user = { name: \"\u5c71\u7530\", age: 25 }\n\n  puts user  # \u57fa\u672c\u7684\u306a\u51fa\u529b\n  p user     # \u3088\u308a\u8a73\u7d30\u306a\u60c5\u5831\u3092\u8868\u793a\n  require 'pp'\n  pp user    # \u6574\u5f62\u3055\u308c\u3066\u898b\u3084\u3059\u304f\u8868\u793a\nend<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>byebug\u3092\u4f7f\u7528\u3057\u305f\u9ad8\u5ea6\u306a\u30c7\u30d0\u30c3\u30b0<\/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=\"\">require 'byebug'\n\ndef complex_calculation\n  x = 10\n  y = 20\n  byebug  # \u3053\u3053\u3067\u30c7\u30d0\u30c3\u30ac\u30fc\u304c\u8d77\u52d5\n  result = x * y + complex_operation(x)\n  result\nend<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>binding.pry\u3092\u4f7f\u7528\u3057\u305f\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u30c7\u30d0\u30c3\u30b0<\/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=\"\">require 'pry'\n\ndef process_data(data)\n  processed = data.map { |item| item.to_i * 2 }\n  binding.pry  # \u3053\u3053\u3067\u5bfe\u8a71\u7684\u306a\u30c7\u30d0\u30c3\u30b0\u30bb\u30c3\u30b7\u30e7\u30f3\u304c\u958b\u59cb\n  processed.sum\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-24\">\u5909\u6570\u95a2\u9023\u306e\u4e3b\u8981\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8<\/h3>\n\n\n\n<p>\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3068\u305d\u306e\u5bfe\u51e6\u6cd5\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>NameError: undefined local variable or method<\/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=\"\"># \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u30b3\u30fc\u30c9\ndef example\n  puts undefined_variable  # \u672a\u5b9a\u7fa9\u306e\u5909\u6570\u3092\u4f7f\u7528\nend\n\n# \u5bfe\u51e6\u6cd5\ndef example\n  undefined_variable = \"\u5b9a\u7fa9\u6e08\u307f\"\n  puts undefined_variable\nend<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>NoMethodError: undefined method for nil:NilClass<\/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=\"\"># \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u30b3\u30fc\u30c9\ndef process_user\n  user = find_user(1)\n  user.name.upcase  # user\u304cnil\u306e\u5834\u5408\u306b\u30a8\u30e9\u30fc\n\n# \u5bfe\u51e6\u6cd5\ndef process_user\n  user = find_user(1)\n  return \"\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\" unless user\n  user.name.upcase\nend<\/pre>\n\n\n\n<p>\u30c7\u30d0\u30c3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n<div id=\"id-2b4fbcc0-9e97-4cfc-9358-43b85f1cd792\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u624b\u6cd5<\/th><th>\u7528\u9014<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><\/tr><\/thead><tbody><tr><td>puts\/p\/pp<\/td><td>\u7c21\u5358\u306a\u5024\u306e\u78ba\u8a8d<\/td><td>\u624b\u8efd\u306b\u5b9f\u884c\u3067\u304d\u308b<\/td><\/tr><tr><td>byebug<\/td><td>\u30b9\u30c6\u30c3\u30d7\u5b9f\u884c\u30c7\u30d0\u30c3\u30b0<\/td><td>\u8a73\u7d30\u306a\u52d5\u4f5c\u78ba\u8a8d\u304c\u53ef\u80fd<\/td><\/tr><tr><td>binding.pry<\/td><td>\u5bfe\u8a71\u7684\u30c7\u30d0\u30c3\u30b0<\/td><td>\u5b9f\u884c\u4e2d\u306e\u74b0\u5883\u3092\u8abf\u67fb\u3067\u304d\u308b<\/td><\/tr><tr><td>Logger<\/td><td>\u30ed\u30b0\u51fa\u529b<\/td><td>\u672c\u756a\u74b0\u5883\u3067\u3082\u4f7f\u7528\u53ef\u80fd<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u5909\u6570\u306e\u30c7\u30d0\u30c3\u30b0\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5909\u6570\u304c\u671f\u5f85\u901a\u308a\u306b\u521d\u671f\u5316\u3055\u308c\u3066\u3044\u308b\u304b<\/li>\n\n\n\n<li>\u30b9\u30b3\u30fc\u30d7\u306f\u9069\u5207\u304b<\/li>\n\n\n\n<li>nil\u306b\u306a\u308b\u53ef\u80fd\u6027\u306f\u306a\u3044\u304b<\/li>\n\n\n\n<li>\u578b\u306f\u671f\u5f85\u901a\u308a\u304b<\/li>\n\n\n\n<li>\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u306e\u5f71\u97ff\u306f\u306a\u3044\u304b<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af\u3068\u6ce8\u610f\u70b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u306a\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":{"0":"post-1562","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\/1562","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=1562"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1562\/revisions"}],"predecessor-version":[{"id":1563,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1562\/revisions\/1563"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}