{"id":1497,"date":"2025-03-24T08:50:35","date_gmt":"2025-03-23T23:50:35","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1497"},"modified":"2025-03-24T08:50:35","modified_gmt":"2025-03-23T23:50:35","slug":"%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91ruby%e3%81%aeprint%e5%ae%8c%e5%85%a8%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%ef%bc%81%e7%8f%be%e5%bd%b9%e3%82%a8%e3%83%b3%e3%82%b8%e3%83%8b%e3%82%a2%e3%81%8c","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1497","title":{"rendered":"\u3010\u4fdd\u5b58\u7248\u3011Ruby\u306eprint\u5b8c\u5168\u30de\u30b9\u30bf\u30fc\uff01\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u6559\u3048\u308b7\u3064\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">Ruby\u306e\u51fa\u529b\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">print\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u7279\u5fb4<\/a>      <\/li>      <li>        <a href=\"#i-2\">print\u3068puts\u306e\u91cd\u8981\u306a\u9055\u3044<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">p\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u305f\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u306e\u30b3\u30c4<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">print\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u306b\u3088\u308b\u7f8e\u3057\u3044\u51fa\u529b\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u7279\u6b8a\u6587\u5b57\u3068\u6539\u884c\u3092\u4f7f\u3044\u3053\u306a\u3059\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u65e5\u672c\u8a9e\u6587\u5b57\u5217\u3092\u6271\u3046\u969b\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">print\u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">\u5927\u91cf\u30c7\u30fc\u30bf\u51fa\u529b\u6642\u306e\u52b9\u7387\u7684\u306a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u51fa\u529b\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-12\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u51fa\u529b\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">\u30ed\u30b0\u51fa\u529b\u3068\u306e\u4f7f\u3044\u5206\u3051\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-14\">\u958b\u767a\u6642\u306b\u5f79\u7acb\u3064\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u624b\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u30c6\u30b9\u30c8\u6642\u306e\u51fa\u529b\u691c\u8a3c\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-16\">\u3088\u304f\u3042\u308bprint\u95a2\u9023\u306e\u30a8\u30e9\u30fc\u3068\u5bfe\u51e6\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u95a2\u3059\u308b\u554f\u984c\u306e\u89e3\u6c7a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u51fa\u529b\u5148\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u30a8\u30e9\u30fc\u5bfe\u7b56<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u6ce8\u610f\u70b9<\/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\u51fa\u529b\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">print\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u7279\u5fb4<\/h3>\n\n\n\n<p><code>print<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001Ruby\u3067\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u51fa\u529b\u30e1\u30bd\u30c3\u30c9\u306e1\u3064\u3067\u3059\u3002\u5f15\u6570\u3068\u3057\u3066\u4e0e\u3048\u3089\u308c\u305f\u5024\u3092\u6a19\u6e96\u51fa\u529b\u306b\u51fa\u529b\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6539\u884c\u3092\u81ea\u52d5\u7684\u306b\u8ffd\u52a0\u3057\u306a\u3044<\/li>\n\n\n\n<li>\u5f15\u6570\u3092\u6587\u5b57\u5217\u3068\u3057\u3066\u51fa\u529b\uff08<code>to_s<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u5185\u90e8\u3067\u547c\u3073\u51fa\u3057\uff09<\/li>\n\n\n\n<li>\u8907\u6570\u306e\u5f15\u6570\u3092\u30ab\u30f3\u30de\u3067\u533a\u5207\u3063\u3066\u6e21\u305b\u308b<\/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=\"\"># \u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\nprint \"Hello\"  # =&gt; Hello\uff08\u6539\u884c\u306a\u3057\uff09\nprint \"World\"  # =&gt; HelloWorld\uff08\u7d9a\u3051\u3066\u51fa\u529b\uff09\n\n# \u8907\u6570\u306e\u5f15\u6570\u3092\u6e21\u3059\nprint \"Hello\", \" \", \"World\"  # =&gt; Hello World\n\n# \u6570\u5024\u3092\u51fa\u529b\uff08\u81ea\u52d5\u7684\u306b\u6587\u5b57\u5217\u5909\u63db\uff09\nprint 42  # =&gt; 42<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">print\u3068puts\u306e\u91cd\u8981\u306a\u9055\u3044<\/h3>\n\n\n\n<p><code>print<\/code>\u3068<code>puts<\/code>\u306f\u4f3c\u3066\u3044\u308b\u3088\u3046\u3067\u7570\u306a\u308b\u7279\u5fb4\u3092\u6301\u3063\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># puts \u306f\u81ea\u52d5\u7684\u306b\u6539\u884c\u3092\u8ffd\u52a0\nputs \"Hello\"\nputs \"World\"\n# \u51fa\u529b:\n# Hello\n# World\n\n# print \u306f\u6539\u884c\u3092\u8ffd\u52a0\u3057\u306a\u3044\nprint \"Hello\"\nprint \"World\"\n# \u51fa\u529b:\n# HelloWorld\n\n# puts \u306f\u914d\u5217\u306e\u5404\u8981\u7d20\u3092\u5225\u884c\u3067\u51fa\u529b\nputs [1, 2, 3]\n# \u51fa\u529b:\n# 1\n# 2\n# 3\n\n# print \u306f\u914d\u5217\u3092to_s\u3057\u305f\u7d50\u679c\u3092\u305d\u306e\u307e\u307e\u51fa\u529b\nprint [1, 2, 3]\n# \u51fa\u529b:\n# [1, 2, 3]<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">p\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u305f\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u306e\u30b3\u30c4<\/h3>\n\n\n\n<p><code>p<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30c7\u30d0\u30c3\u30b0\u6642\u306b\u7279\u306b\u4fbf\u5229\u306a\u51fa\u529b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># p \u30e1\u30bd\u30c3\u30c9\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5185\u90e8\u8868\u73fe\u3092\u51fa\u529b\nstring = \"Hello\\n\"\nprint string  # =&gt; Hello\uff08\u6539\u884c\uff09\nputs string   # =&gt; Hello\uff08\u6539\u884c\uff09\np string      # =&gt; \"Hello\\n\"\uff08\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u306e\u5f62\u5f0f\u3067\u8868\u793a\uff09\n\n# nil \u3084\u914d\u5217\u306e\u51fa\u529b\u3067\u306e\u9055\u3044\nprint nil  # =&gt; \u4f55\u3082\u51fa\u529b\u3055\u308c\u306a\u3044\nputs nil   # =&gt; \u7a7a\u884c\u304c\u51fa\u529b\u3055\u308c\u308b\np nil      # =&gt; nil\n\n# \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8a73\u7d30\u306a\u60c5\u5831\u3092\u78ba\u8a8d\nuser = { name: \"\u7530\u4e2d\", age: 25 }\np user  # =&gt; {:name=&gt;\"\u7530\u4e2d\", :age=&gt;25}\n\n# \u30c7\u30d0\u30c3\u30b0\u6642\u306e\u623b\u308a\u5024\u306e\u78ba\u8a8d\ndef calculate(x, y)\n  result = x * y\n  p \"\u8a08\u7b97\u7d50\u679c: #{result}\"  # \u30c7\u30d0\u30c3\u30b0\u51fa\u529b\n  result\nend\n\ncalculate(5, 3)  # =&gt; \"\u8a08\u7b97\u7d50\u679c: 15\"\n                 # =&gt; 15<\/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\n<ol class=\"wp-block-list\">\n<li>\u5909\u6570\u306e\u578b\u3084\u5024\u306e\u78ba\u8a8d\u306b\u306f<code>p<\/code>\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u30e6\u30fc\u30b6\u30fc\u5411\u3051\u306e\u51fa\u529b\u306b\u306f<code>puts<\/code>\u304b<code>print<\/code>\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u30ed\u30b0\u51fa\u529b\u3068\u306e\u4f7f\u3044\u5206\u3051\u3092\u610f\u8b58\uff08\u5f8c\u8ff0\u306e\u30c7\u30d0\u30c3\u30b0\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u8a73\u8aac\uff09<\/li>\n<\/ol>\n\n\n\n<p>\u5404\u30e1\u30bd\u30c3\u30c9\u306e\u7279\u5fb4\u6bd4\u8f03\uff1a<\/p>\n\n\n<div id=\"id-ab05524f-6fa8-4516-897e-fb46edd90d6b\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e1\u30bd\u30c3\u30c9<\/th><th>\u6539\u884c\u306e\u8ffd\u52a0<\/th><th>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8868\u793a\u5f62\u5f0f<\/th><th>\u4e3b\u306a\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td>print<\/td><td>\u306a\u3057<\/td><td>to_s \u306e\u7d50\u679c<\/td><td>\u30b7\u30f3\u30d7\u30eb\u306a\u51fa\u529b<\/td><\/tr><tr><td>puts<\/td><td>\u3042\u308a<\/td><td>to_s \u306e\u7d50\u679c<\/td><td>\u8aad\u307f\u3084\u3059\u3044\u51fa\u529b<\/td><\/tr><tr><td>p<\/td><td>\u3042\u308a<\/td><td>inspect \u306e\u7d50\u679c<\/td><td>\u30c7\u30d0\u30c3\u30b0<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">print\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u306b\u3088\u308b\u7f8e\u3057\u3044\u51fa\u529b\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>print\u30e1\u30bd\u30c3\u30c9\u3068\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u6574\u5f62\u3055\u308c\u305f\u7f8e\u3057\u3044\u51fa\u529b\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># sprintf\uff08\u307e\u305f\u306f%\u8a18\u6cd5\uff09\u3092\u4f7f\u7528\u3057\u305f\u51fa\u529b\nprice = 1000\ntax = 0.1\nprint sprintf(\"\u4fa1\u683c: %d\u5186 (\u7a0e\u8fbc\u307f: %.2f\u5186)\\n\", price, price * (1 + tax))\n# \u51fa\u529b: \u4fa1\u683c: 1000\u5186 (\u7a0e\u8fbc\u307f: 1100.00\u5186)\n\n# \u6841\u63c3\u3048\u30680\u57cb\u3081\nitems = [\n  { id: 1, name: \"\u308a\u3093\u3054\" },\n  { id: 2, name: \"\u307f\u304b\u3093\" },\n  { id: 10, name: \"\u30e1\u30ed\u30f3\" }\n]\n\nitems.each do |item|\n  print sprintf(\"\u5546\u54c1ID: %03d - %s\\n\", item[:id], item[:name])\nend\n# \u51fa\u529b:\n# \u5546\u54c1ID: 001 - \u308a\u3093\u3054\n# \u5546\u54c1ID: 002 - \u307f\u304b\u3093\n# \u5546\u54c1ID: 010 - \u30e1\u30ed\u30f3<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u7279\u6b8a\u6587\u5b57\u3068\u6539\u884c\u3092\u4f7f\u3044\u3053\u306a\u3059\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u7279\u6b8a\u6587\u5b57\u3068\u6539\u884c\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u898b\u3084\u3059\u3044\u51fa\u529b\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30a8\u30b9\u30b1\u30fc\u30d7\u30b7\u30fc\u30b1\u30f3\u30b9\u306e\u6d3b\u7528\nprint \"\u5546\u54c1\u4e00\u89a7:\\n\"\nprint \"\\t- \u308a\u3093\u3054\\t\\t\u00a5100\\n\"\nprint \"\\t- \u307f\u304b\u3093\\t\\t\u00a5150\\n\"\nprint \"\\t- \u30e1\u30ed\u30f3\\t\\t\u00a52,000\\n\"\n\n# \u30ab\u30e9\u30fc\u51fa\u529b\uff08ANSI\u30a8\u30b9\u30b1\u30fc\u30d7\u30b7\u30fc\u30b1\u30f3\u30b9\uff09\nprint \"\\e[31m\u8d64\u6587\u5b57\\e[0m\\n\"  # \u8d64\u8272\u3067\u51fa\u529b\nprint \"\\e[44m\u9752\u80cc\u666f\\e[0m\\n\"  # \u9752\u80cc\u666f\u3067\u51fa\u529b\n\n# \u9032\u6357\u8868\u793a\u306e\u5b9f\u88c5\u4f8b\n100.times do |i|\n  print \"\\rProgress: #{i+1}%\"\n  sleep(0.01)\nend\nprint \"\\n\"  # \u6700\u5f8c\u306b\u6539\u884c<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u65e5\u672c\u8a9e\u6587\u5b57\u5217\u3092\u6271\u3046\u969b\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u65e5\u672c\u8a9e\u6587\u5b57\u5217\u3092\u6271\u3046\u969b\u306f\u3001\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u6307\u5b9a\n# coding: utf-8\n\n# \u6587\u5b57\u5217\u306e\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u78ba\u8a8d\nstr = \"\u3053\u3093\u306b\u3061\u306f\"\nprint \"\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0: #{str.encoding}\\n\"  # =&gt; \u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0: UTF-8\n\n# \u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u306e\u5e45\u3092\u8003\u616e\u3057\u305f\u6574\u5f62\ndef format_japanese(str, width)\n  # \u534a\u89d2\u30921\u3001\u5168\u89d2\u30922\u3068\u3057\u3066\u30ab\u30a6\u30f3\u30c8\n  current_width = str.each_char.sum {|c| c.bytesize &gt; 1 ? 2 : 1}\n  padding = [0, width - current_width].max\n  str + \" \" * padding\nend\n\nitems = [\n  { name: \"\u308a\u3093\u3054\", price: 100 },\n  { name: \"\u307f\u304b\u3093\", price: 150 },\n  { name: \"\u30e1\u30ed\u30f3\", price: 2000 }\n]\n\nitems.each do |item|\n  print \"#{format_japanese(item[:name], 10)}#{item[:price]}\u5186\\n\"\nend\n# \u51fa\u529b:\n# \u308a\u3093\u3054    100\u5186\n# \u307f\u304b\u3093    150\u5186\n# \u30e1\u30ed\u30f3    2000\u5186\n\n# \u6587\u5b57\u5316\u3051\u306e\u9632\u6b62\nbegin\n  print \"\u65e5\u672c\u8a9e\u6587\u5b57\u5217\".encode(\"UTF-8\")\nrescue Encoding::UndefinedConversionError\n  print \"\u6587\u5b57\u30b3\u30fc\u30c9\u306e\u5909\u63db\u306b\u5931\u6557\u3057\u307e\u3057\u305f\\n\"\nend<\/pre>\n\n\n\n<p>\u5b9f\u8df5\u7684\u306aTips\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u5024\u306e\u6841\u63c3\u3048\u306b\u306f<code>sprintf<\/code>\u304b<code>format<\/code>\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u91d1\u984d\u8868\u793a\u306b\u306f<code>%.2f<\/code>\u3067\u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\u306b\u7d71\u4e00<\/li>\n\n\n\n<li>ID\u306a\u3069\u306e0\u57cb\u3081\u306b\u306f<code>%0Nd<\/code>\u3092\u4f7f\u7528\uff08N\u306f\u6841\u6570\uff09<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6539\u884c\u5236\u5fa1\u306e\u30b3\u30c4\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>\\r<\/code>\u3092\u4f7f\u7528\u3057\u3066\u540c\u3058\u884c\u3092\u4e0a\u66f8\u304d\uff08\u30d7\u30ed\u30b0\u30ec\u30b9\u30d0\u30fc\u306a\u3069\uff09<\/li>\n\n\n\n<li><code>\\t<\/code>\u3067\u30a4\u30f3\u30c7\u30f3\u30c8\u3092\u63c3\u3048\u308b<\/li>\n\n\n\n<li>\u6700\u7d42\u884c\u306b\u306f\u5fc5\u305a<code>\\n<\/code>\u3092\u4ed8\u3051\u3066\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u6642\u306e\u554f\u984c\u3092\u9632\u3050<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u65e5\u672c\u8a9e\u51e6\u7406\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u305aUTF-8\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u5168\u89d2\u6587\u5b57\u306e\u5e45\u3092\u8003\u616e\u3057\u305f\u6574\u5f62\u51e6\u7406\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u4f8b\u5916\u306e\u9069\u5207\u306a\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">print\u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u5927\u91cf\u30c7\u30fc\u30bf\u51fa\u529b\u6642\u306e\u52b9\u7387\u7684\u306a\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51fa\u529b\u3059\u308b\u969b\u306f\u3001\u9069\u5207\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u51e6\u7406\u901f\u5ea6\u3092\u5927\u5e45\u306b\u6539\u5584\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">require 'benchmark'\n\n# \u975e\u52b9\u7387\u306a\u65b9\u6cd5\u3068\u52b9\u7387\u7684\u306a\u65b9\u6cd5\u306e\u6bd4\u8f03\ndef compare_output_methods\n  data = (1..100000).to_a\n\n  Benchmark.bm(20) do |x|\n    # \u975e\u52b9\u7387: 1\u884c\u305a\u3064print\n    x.report(\"1\u884c\u305a\u3064print:\") do\n      data.each { |n| print \"#{n}\\n\" }\n    end\n\n    # \u52b9\u7387\u7684: \u914d\u5217\u3092\u7d50\u5408\u3057\u3066\u4e00\u62ec\u51fa\u529b\n    x.report(\"\u914d\u5217\u7d50\u5408\u3057\u3066\u51fa\u529b:\") do\n      print data.join(\"\\n\") + \"\\n\"\n    end\n\n    # \u3088\u308a\u52b9\u7387\u7684: StringIO\u4f7f\u7528\n    x.report(\"StringIO\u4f7f\u7528:\") do\n      require 'stringio'\n      output = StringIO.new\n      data.each { |n| output.print \"#{n}\\n\" }\n      print output.string\n    end\n  end\nend\n\n# \u5927\u91cf\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406\ndef process_large_data\n  File.open('output.txt', 'w') do |file|\n    (1..1000000).each_slice(1000) do |batch|\n      # \u30d0\u30c3\u30c1\u51e6\u7406\u3067\u30e1\u30e2\u30ea\u4f7f\u7528\u3092\u6291\u5236\n      file.print batch.join(\"\\n\") + \"\\n\"\n    end\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u306a\u304c\u3089\u5927\u91cf\u30c7\u30fc\u30bf\u3092\u51fa\u529b\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># Enumerator\u3092\u4f7f\u7528\u3057\u305f\u9045\u5ef6\u8a55\u4fa1\ndef generate_data\n  Enumerator.new do |yielder|\n    count = 0\n    loop do\n      yielder &lt;&lt; \"\u30c7\u30fc\u30bf#{count}\"\n      count += 1\n    end\n  end\nend\n\n# \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u51fa\u529b\u51e6\u7406\ndef memory_efficient_output\n  generator = generate_data\n  File.open('large_output.txt', 'w') do |file|\n    1000.times do\n      # \u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u3092\u6307\u5b9a\u3057\u3066\u51fa\u529b\n      file.print generator.next + \"\\n\"\n      file.flush if file.pos &gt; 8192  # 8KB\u3054\u3068\u306b\u30d5\u30e9\u30c3\u30b7\u30e5\n    end\n  end\nend\n\n# StringIO\u3092\u4f7f\u7528\u3057\u305f\u30e1\u30e2\u30ea\u52b9\u7387\u5316\ndef string_io_example\n  require 'stringio'\n  output = StringIO.new\n  # \u30e1\u30e2\u30ea\u4e0a\u3067\u52b9\u7387\u7684\u306b\u6587\u5b57\u5217\u3092\u69cb\u7bc9\n  100.times { |i| output.print \"\u884c#{i}\\n\" }\n\n  # \u6700\u5f8c\u306b\u307e\u3068\u3081\u3066\u51fa\u529b\n  print output.string\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u51fa\u529b\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u306e\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3092\u9069\u5207\u306b\u5236\u5fa1\u3059\u308b\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u5373\u6642\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u5236\u5fa1\u306e\u4f8b\nSTDOUT.sync = true  # \u5373\u6642\u30d5\u30e9\u30c3\u30b7\u30e5\u30e2\u30fc\u30c9\nprint \"\u5373\u6642\u51fa\u529b\u3055\u308c\u308b\\n\"\n\nSTDOUT.sync = false  # \u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u30e2\u30fc\u30c9\nprint \"\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3055\u308c\u308b\\n\"\nSTDOUT.flush  # \u660e\u793a\u7684\u306a\u30d5\u30e9\u30c3\u30b7\u30e5\n\n# \u30d7\u30ed\u30b0\u30ec\u30b9\u8868\u793a\u3067\u306e\u6d3b\u7528\u4f8b\ndef show_progress\n  100.times do |i|\n    print \"\\rProgress: #{i+1}%\"\n    STDOUT.flush  # \u30d7\u30ed\u30b0\u30ec\u30b9\u8868\u793a\u7528\u306b\u5373\u6642\u30d5\u30e9\u30c3\u30b7\u30e5\n    sleep(0.01)\n  end\n  print \"\\n\"\nend\n\n# \u51fa\u529b\u5148\u306b\u3088\u308b\u6700\u9069\u5316\ndef output_optimization\n  # \u30d5\u30a1\u30a4\u30eb\u51fa\u529b\uff08\u5927\u304d\u3081\u306e\u30d0\u30c3\u30d5\u30a1\uff09\n  File.open('log.txt', 'w') do |file|\n    file.print \"\u30ed\u30b0\u958b\u59cb\\n\"\n    file.flush  # \u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3067\u30d5\u30e9\u30c3\u30b7\u30e5\n  end\n\n  # \u6a19\u6e96\u51fa\u529b\uff08\u5c0f\u3055\u3081\u306e\u30d0\u30c3\u30d5\u30a1\uff09\n  $stdout.sync = true\n  print \"\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u51fa\u529b\\n\"\nend<\/pre>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5927\u91cf\u30c7\u30fc\u30bf\u51fa\u529b\u6642\u306e\u6ce8\u610f\u70b9\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3067\u304d\u308b\u3060\u3051\u307e\u3068\u3081\u3066\u51fa\u529b\u3059\u308b<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30d0\u30c3\u30c1\u30b5\u30a4\u30ba\u3092\u9078\u629e<\/li>\n\n\n\n<li>StringIO\u306e\u6d3b\u7528\u3092\u691c\u8a0e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Enumerator\u306b\u3088\u308b\u9045\u5ef6\u8a55\u4fa1<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u306e\u8a2d\u5b9a<\/li>\n\n\n\n<li>\u5b9a\u671f\u7684\u306a\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u306e\u5236\u5fa1\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7528\u9014\u306b\u5fdc\u3058\u305fsync\u30e2\u30fc\u30c9\u306e\u5207\u308a\u66ff\u3048<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u306eflush<\/li>\n\n\n\n<li>\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u9069\u5207\u306a\u7ba1\u7406<\/li>\n<\/ul>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u8868\uff1a<\/p>\n\n\n<div id=\"id-dbb4ca9d-7786-46a4-a044-4646c6dc1318\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u51fa\u529b\u65b9\u6cd5<\/th><th>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/th><th>\u51e6\u7406\u901f\u5ea6<\/th><th>\u5373\u6642\u6027<\/th><\/tr><\/thead><tbody><tr><td>1\u884c\u305a\u3064print<\/td><td>\u4f4e<\/td><td>\u4f4e<\/td><td>\u9ad8<\/td><\/tr><tr><td>\u914d\u5217\u7d50\u5408\u4e00\u62ec\u51fa\u529b<\/td><td>\u9ad8<\/td><td>\u9ad8<\/td><td>\u4f4e<\/td><\/tr><tr><td>StringIO\u4f7f\u7528<\/td><td>\u4e2d<\/td><td>\u9ad8<\/td><td>\u4e2d<\/td><\/tr><tr><td>\u30d0\u30c3\u30c1\u51e6\u7406<\/td><td>\u4e2d<\/td><td>\u4e2d<\/td><td>\u4e2d<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"i-12\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u51fa\u529b\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u30ed\u30b0\u51fa\u529b\u3068\u306e\u4f7f\u3044\u5206\u3051\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u3068\u30ed\u30b0\u51fa\u529b\u306f\u76ee\u7684\u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">require 'logger'\n\nclass OrderProcessor\n  def initialize\n    # \u30ed\u30b0\u51fa\u529b\u306e\u8a2d\u5b9a\n    @logger = Logger.new('order_processing.log')\n    @logger.level = Logger::INFO\n  end\n\n  def process_order(order)\n    # \u30ed\u30b0\u51fa\u529b\uff08\u6c38\u7d9a\u5316\u3055\u308c\u308b\uff09\n    @logger.info(\"\u6ce8\u6587\u51e6\u7406\u958b\u59cb: OrderID=#{order.id}\")\n\n    # \u30c7\u30d0\u30c3\u30b0\u51fa\u529b\uff08\u958b\u767a\u6642\u306e\u307f\uff09\n    if ENV['DEBUG']\n      print \"\u6ce8\u6587\u5185\u5bb9:\\n\"\n      p order.items  # \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8a73\u7d30\u3092\u78ba\u8a8d\n    end\n\n    begin\n      calculate_total(order)\n\n      # \u51e6\u7406\u6210\u529f\u306e\u30ed\u30b0\n      @logger.info(\"\u6ce8\u6587\u51e6\u7406\u5b8c\u4e86: OrderID=#{order.id}\")\n    rescue =&gt; e\n      # \u30a8\u30e9\u30fc\u30ed\u30b0\n      @logger.error(\"\u6ce8\u6587\u51e6\u7406\u5931\u6557: #{e.message}\")\n      print \"\u30a8\u30e9\u30fc\u767a\u751f: #{e.message}\\n\" if ENV['DEBUG']\n    end\n  end\n\n  private\n\n  def calculate_total(order)\n    # \u30c7\u30d0\u30c3\u30b0\u7528\u306e\u4e2d\u9593\u5024\u78ba\u8a8d\n    subtotal = order.items.sum(&amp;:price)\n    print \"\u5c0f\u8a08: #{subtotal}\u5186\\n\" if ENV['DEBUG']\n\n    # \u672c\u756a\u74b0\u5883\u3067\u306f\u30ed\u30b0\u306e\u307f\n    @logger.debug(\"\u8a08\u7b97\u7d50\u679c: #{subtotal}\u5186\")\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u958b\u767a\u6642\u306b\u5f79\u7acb\u3064\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u624b\u6cd5<\/h3>\n\n\n\n<p>\u52b9\u679c\u7684\u306a\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u305f\u3081\u306e\u51fa\u529b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">module DebuggableModule\n  def debug_output(label, value)\n    return unless ENV['DEBUG']\n\n    caller_info = caller_locations(1,1).first\n    file = File.basename(caller_info.path)\n    line = caller_info.lineno\n\n    print \"[DEBUG][#{file}:#{line}] #{label}: \"\n    p value  # p \u3092\u4f7f\u7528\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8a73\u7d30\u3092\u51fa\u529b\n  end\nend\n\nclass ComplexCalculator\n  include DebuggableModule\n\n  def calculate_with_debug(data)\n    # \u5165\u529b\u5024\u306e\u78ba\u8a8d\n    debug_output(\"\u5165\u529b\u30c7\u30fc\u30bf\", data)\n\n    # \u4e2d\u9593\u51e6\u7406\u7d50\u679c\u306e\u78ba\u8a8d\n    processed_data = data.map { |x| x * 2 }\n    debug_output(\"1\u6b21\u51e6\u7406\u5f8c\", processed_data)\n\n    # \u6761\u4ef6\u5206\u5c90\u306e\u8ffd\u8de1\n    if processed_data.sum &gt; 100\n      debug_output(\"\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\", \"sum &gt; 100\")\n      process_large_data(processed_data)\n    else\n      debug_output(\"\u901a\u5e38\u30c7\u30fc\u30bf\u51e6\u7406\", \"sum &lt;= 100\")\n      process_normal_data(processed_data)\n    end\n  end\n\n  private\n\n  def process_large_data(data)\n    # \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u78ba\u8a8d\n    debug_output(\"\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\", \"#{ObjectSpace.memsize_of(data)} bytes\")\n    # \u51e6\u7406\u306e\u5b9f\u88c5\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30c6\u30b9\u30c8\u6642\u306e\u51fa\u529b\u691c\u8a3c\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u30c6\u30b9\u30c8\u6642\u306e\u51fa\u529b\u3092\u52b9\u679c\u7684\u306b\u691c\u8a3c\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">require 'minitest\/autorun'\nrequire 'stringio'\n\nclass OutputTest &lt; Minitest::Test\n  def setup\n    # \u6a19\u6e96\u51fa\u529b\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u6e96\u5099\n    @original_stdout = $stdout\n    @captured_output = StringIO.new\n    $stdout = @captured_output\n  end\n\n  def teardown\n    # \u6a19\u6e96\u51fa\u529b\u3092\u5143\u306b\u623b\u3059\n    $stdout = @original_stdout\n  end\n\n  def test_output_format\n    # \u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30e1\u30bd\u30c3\u30c9\n    print_formatted_data(\n      name: \"\u30c6\u30b9\u30c8\u5546\u54c1\",\n      price: 1000,\n      stock: 5\n    )\n\n    # \u51fa\u529b\u7d50\u679c\u3092\u53d6\u5f97\n    output = @captured_output.string\n\n    # \u51fa\u529b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u691c\u8a3c\n    assert_match(\/\u5546\u54c1\u540d\uff1a\u30c6\u30b9\u30c8\u5546\u54c1\/, output)\n    assert_match(\/\u4fa1\u683c\uff1a1,000\u5186\/, output)\n    assert_match(\/\u5728\u5eab\uff1a5\u500b\/, output)\n  end\n\n  def test_multiline_output\n    # \u8907\u6570\u884c\u51fa\u529b\u306e\u30c6\u30b9\u30c8\n    print_report_header\n    print_report_body\n    print_report_footer\n\n    lines = @captured_output.string.split(\"\\n\")\n\n    assert_equal \"\u30ec\u30dd\u30fc\u30c8\u958b\u59cb\", lines[0]\n    assert_match(\/^\u30c7\u30fc\u30bf\uff1a.*\/, lines[1])\n    assert_equal \"\u30ec\u30dd\u30fc\u30c8\u7d42\u4e86\", lines[-1]\n  end\n\n  private\n\n  def print_formatted_data(data)\n    print \"\u5546\u54c1\u540d\uff1a#{data[:name]}\\n\"\n    print \"\u4fa1\u683c\uff1a#{data[:price].to_s(:delimited)}\u5186\\n\"\n    print \"\u5728\u5eab\uff1a#{data[:stock]}\u500b\\n\"\n  end\nend<\/pre>\n\n\n\n<p>\u5b9f\u52d9\u7684\u306a\u30c7\u30d0\u30c3\u30b0\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ed\u30b0\u3068\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u306e\u4f7f\u3044\u5206\u3051\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ed\u30b0\uff1a\u6c38\u7d9a\u5316\u304c\u5fc5\u8981\u306a\u60c5\u5831\u3001\u672c\u756a\u74b0\u5883\u3067\u306e\u8ffd\u8de1<\/li>\n\n\n\n<li>print\/p\uff1a\u958b\u767a\u6642\u306e\u4e00\u6642\u7684\u306a\u78ba\u8a8d\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8a73\u7d30\u8868\u793a<\/li>\n\n\n\n<li>puts\uff1a\u8aad\u307f\u3084\u3059\u3044\u5f62\u5f0f\u3067\u306e\u4e2d\u9593\u7d50\u679c\u78ba\u8a8d<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u52b9\u679c\u7684\u306a\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u306e\u8a2d\u8a08\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u74b0\u5883\u5909\u6570\u306b\u3088\u308b\u51fa\u529b\u5236\u5fa1<\/li>\n\n\n\n<li>\u30d5\u30a1\u30a4\u30eb\u540d\u30fb\u884c\u756a\u53f7\u306e\u4ed8\u4e0e<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30e9\u30d9\u30eb\u4ed8\u3051<\/li>\n\n\n\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u628a\u63e1<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u3067\u306e\u51fa\u529b\u691c\u8a3c\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6a19\u6e96\u51fa\u529b\u306e\u30ad\u30e3\u30d7\u30c1\u30e3<\/li>\n\n\n\n<li>\u6b63\u898f\u8868\u73fe\u306b\u3088\u308b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u691c\u8a3c<\/li>\n\n\n\n<li>\u30de\u30eb\u30c1\u30e9\u30a4\u30f3\u51fa\u529b\u306e\u30c6\u30b9\u30c8<\/li>\n\n\n\n<li>\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\/\u30c6\u30a3\u30a2\u30c0\u30a6\u30f3\u306e\u9069\u5207\u306a\u5b9f\u88c5<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-16\">\u3088\u304f\u3042\u308bprint\u95a2\u9023\u306e\u30a8\u30e9\u30fc\u3068\u5bfe\u51e6\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u95a2\u3059\u308b\u554f\u984c\u306e\u89e3\u6c7a\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u6587\u5b57\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u95a2\u3059\u308b\u554f\u984c\u306f\u6700\u3082\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u306e\u4e00\u3064\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30a8\u30e9\u30fc\u306e\u5bfe\u51e6\u4f8b\nclass EncodingHandler\n  def self.safe_print(text)\n    begin\n      print text\n    rescue Encoding::UndefinedConversionError =&gt; e\n      # \u5909\u63db\u3067\u304d\u306a\u3044\u6587\u5b57\u3092\u542b\u3080\u5834\u5408\u306e\u5bfe\u51e6\n      print text.encode('UTF-8', invalid: :replace, undef: :replace, replace: '?')\n    rescue Encoding::InvalidByteSequenceError =&gt; e\n      # \u30d0\u30a4\u30c8\u5217\u304c\u4e0d\u6b63\u306a\u5834\u5408\u306e\u5bfe\u51e6\n      print text.force_encoding('UTF-8').scrub('?')\n    end\n  end\n\n  def self.print_with_encoding(text, source_encoding)\n    # \u5165\u529b\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u6307\u5b9a\u3057\u3066\u51fa\u529b\n    encoded_text = text.dup\n    encoded_text.force_encoding(source_encoding)\n    print encoded_text.encode('UTF-8')\n  rescue =&gt; e\n    print \"\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30a8\u30e9\u30fc: #{e.message}\\n\"\n    print \"\u5143\u306e\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0: #{source_encoding}\\n\"\n  end\nend\n\n# \u4f7f\u7528\u4f8b\ntext_with_special_chars = \"\u3053\u3093\u306b\u3061\u306f\\x80\u4e16\u754c\"\nEncodingHandler.safe_print(text_with_special_chars)\n\n# Shift_JIS\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3093\u3067\u51fa\u529b\nFile.open('shift_jis.txt', 'r:Shift_JIS') do |file|\n  EncodingHandler.print_with_encoding(file.read, 'Shift_JIS')\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u51fa\u529b\u5148\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u30a8\u30e9\u30fc\u5bfe\u7b56<\/h3>\n\n\n\n<p>\u51fa\u529b\u5148\u30b9\u30c8\u30ea\u30fc\u30e0\u306b\u95a2\u3059\u308b\u30a8\u30e9\u30fc\u3068\u305d\u306e\u5bfe\u51e6\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class StreamErrorHandler\n  def self.safe_stream_output(content)\n    begin\n      # \u30d1\u30a4\u30d7\u304c\u5207\u308c\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\n      raise Errno::EPIPE if $stdout.closed?\n\n      print content\n      $stdout.flush  # \u30d0\u30c3\u30d5\u30a1\u3092\u78ba\u5b9f\u306b\u30d5\u30e9\u30c3\u30b7\u30e5\n    rescue Errno::EPIPE\n      # \u30d1\u30a4\u30d7\u304c\u5207\u308c\u305f\u5834\u5408\uff08\u4f8b\uff1a\u30d1\u30a4\u30d7\u5148\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u7d42\u4e86\uff09\n      exit(0)\n    rescue IOError =&gt; e\n      # IO\u30a8\u30e9\u30fc\u306e\u4e00\u822c\u7684\u306a\u51e6\u7406\n      $stderr.print \"\u51fa\u529b\u30a8\u30e9\u30fc: #{e.message}\\n\"\n\n      # \u4ee3\u66ff\u51fa\u529b\u5148\u3078\u306e\u51fa\u529b\u3092\u8a66\u307f\u308b\n      File.open('error_log.txt', 'a') do |f|\n        f.print \"#{Time.now}: #{content}\"\n      end\n    end\n  end\n\n  def self.with_output_redirect(filename)\n    # \u51fa\u529b\u5148\u3092\u4e00\u6642\u7684\u306b\u30d5\u30a1\u30a4\u30eb\u306b\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\n    original_stdout = $stdout\n    begin\n      File.open(filename, 'w') do |file|\n        $stdout = file\n        yield if block_given?\n      end\n    ensure\n      $stdout = original_stdout\n    end\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nStreamErrorHandler.safe_stream_output(\"\u91cd\u8981\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\\n\")\n\nStreamErrorHandler.with_output_redirect('output.log') do\n  print \"\u3053\u308c\u306f\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\\n\"\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u51fa\u529b\u306b\u95a2\u3059\u308b\u554f\u984c\u3068\u5bfe\u7b56\u3092\u8aac\u660e\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">require 'thread'\n\nclass ThreadSafePrinter\n  def initialize\n    @mutex = Mutex.new\n  end\n\n  def thread_safe_print(content)\n    @mutex.synchronize do\n      print content\n      $stdout.flush\n    end\n  end\n\n  def print_with_thread_id(content)\n    thread_id = Thread.current.object_id\n    @mutex.synchronize do\n      print \"[Thread-#{thread_id}] #{content}\\n\"\n      $stdout.flush\n    end\n  end\n\n  # \u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3055\u308c\u305f\u51fa\u529b\u3092\u4f7f\u7528\n  def buffered_print\n    local_buffer = []\n    yield local_buffer\n\n    @mutex.synchronize do\n      local_buffer.each { |content| print content }\n      $stdout.flush\n    end\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nprinter = ThreadSafePrinter.new\n\n# \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u3067\u306e\u51fa\u529b\u4f8b\nthreads = 5.times.map do |i|\n  Thread.new do\n    printer.print_with_thread_id(\"\u30b9\u30ec\u30c3\u30c9#{i}\u304b\u3089\u306e\u51fa\u529b\")\n\n    # \u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u305f\u51fa\u529b\n    printer.buffered_print do |buffer|\n      buffer &lt;&lt; \"\u30d0\u30c3\u30d5\u30a11\\n\"\n      buffer &lt;&lt; \"\u30d0\u30c3\u30d5\u30a12\\n\"\n    end\n  end\nend\n\nthreads.each(&amp;:join)<\/pre>\n\n\n\n<p>\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3068\u5bfe\u51e6\u6cd5\u306e\u307e\u3068\u3081\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u95a2\u9023\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9069\u5207\u306a\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u6307\u5b9a<\/li>\n\n\n\n<li>\u4e0d\u6b63\u306a\u6587\u5b57\u306e\u7f6e\u63db<\/li>\n\n\n\n<li>\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u5909\u63db\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b9\u30c8\u30ea\u30fc\u30e0\u95a2\u9023\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IO\u30a8\u30e9\u30fc\u306e\u9069\u5207\u306a\u51e6\u7406<\/li>\n\n\n\n<li>\u4ee3\u66ff\u51fa\u529b\u5148\u306e\u7528\u610f<\/li>\n\n\n\n<li>\u30d0\u30c3\u30d5\u30a1\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u7ba1\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u95a2\u9023\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mutex\u306b\u3088\u308b\u6392\u4ed6\u5236\u5fa1<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u51fa\u529b\u51e6\u7406<\/li>\n\n\n\n<li>\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u306e\u6d3b\u7528<\/li>\n<\/ul>\n\n\n\n<p>\u30a8\u30e9\u30fc\u5bfe\u51e6\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n<div id=\"id-80868a1d-2e30-4db7-8141-c34ced2ca5ca\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30a8\u30e9\u30fc\u306e\u7a2e\u985e<\/th><th>\u539f\u56e0<\/th><th>\u5bfe\u51e6\u65b9\u6cd5<\/th><\/tr><\/thead><tbody><tr><td>\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0<\/td><td>\u6587\u5b57\u30b3\u30fc\u30c9\u306e\u4e0d\u4e00\u81f4<\/td><td>\u9069\u5207\u306a\u5909\u63db\u51e6\u7406\u306e\u5b9f\u88c5<\/td><\/tr><tr><td>IO\u30a8\u30e9\u30fc<\/td><td>\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u554f\u984c<\/td><td>\u4ee3\u66ff\u51fa\u529b\u5148\u306e\u78ba\u4fdd<\/td><\/tr><tr><td>\u30b9\u30ec\u30c3\u30c9\u7af6\u5408<\/td><td>\u540c\u6642\u30a2\u30af\u30bb\u30b9<\/td><td>Mutex\u306b\u3088\u308b\u5236\u5fa1<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>","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-1497","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\/1497","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=1497"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1497\/revisions"}],"predecessor-version":[{"id":1498,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1497\/revisions\/1498"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}