{"id":5032,"date":"2023-03-09T09:00:39","date_gmt":"2023-03-09T00:00:39","guid":{"rendered":"https:\/\/meister-kentei.jp\/magazine\/?p=5032"},"modified":"2023-03-08T09:42:51","modified_gmt":"2023-03-08T00:42:51","slug":"ruby%e3%81%ae%e5%a4%89%e6%95%b0%e4%b8%80%e8%a6%a7%ef%bc%81%e3%82%b9%e3%82%b3%e3%83%bc%e3%83%97%e3%82%84%e5%ae%a3%e8%a8%80%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6%e5%be%b9%e5%ba%95%e8%a7%a3%e8%aa%ac","status":"publish","type":"post","link":"https:\/\/meister-kentei.jp\/magazine\/programming\/5032\/","title":{"rendered":"Ruby\u306e\u5909\u6570\u4e00\u89a7\uff01\u30b9\u30b3\u30fc\u30d7\u3084\u5ba3\u8a00\u306b\u3064\u3044\u3066\u5fb9\u5e95\u89e3\u8aac"},"content":{"rendered":"<div id=\"toc_container\" class=\"toc_white no_bullets\"><p class=\"toc_title\">\u76ee\u6b21<\/p><ul class=\"toc_list\"><li><a href=\"#Ruby\"><span class=\"toc_number toc_depth_1\">1<\/span> Ruby\u306b\u304a\u3051\u308b\u5909\u6570\u3068\u306f<\/a><ul><li><a href=\"#i\"><span class=\"toc_number toc_depth_2\">1.1<\/span> \u5909\u6570\u3068\u306f<\/a><\/li><li><a href=\"#i-2\"><span class=\"toc_number toc_depth_2\">1.2<\/span> \u30b9\u30b3\u30fc\u30d7<\/a><\/li><li><a href=\"#Ruby-2\"><span class=\"toc_number toc_depth_2\">1.3<\/span> Ruby\u306e\u5909\u6570\u4e00\u89a7<\/a><\/li><\/ul><\/li><li><a href=\"#i-3\"><span class=\"toc_number toc_depth_1\">2<\/span> \u30ed\u30fc\u30ab\u30eb\u5909\u6570<\/a><ul><li><a href=\"#i-4\"><span class=\"toc_number toc_depth_2\">2.1<\/span> \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3068\u306f<\/a><\/li><li><a href=\"#i-5\"><span class=\"toc_number toc_depth_2\">2.2<\/span> \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/a><\/li><li><a href=\"#i-6\"><span class=\"toc_number toc_depth_2\">2.3<\/span> \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/a><\/li><\/ul><\/li><li><a href=\"#i-7\"><span class=\"toc_number toc_depth_1\">3<\/span> \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570<\/a><ul><li><a href=\"#i-8\"><span class=\"toc_number toc_depth_2\">3.1<\/span> \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3068\u306f<\/a><\/li><li><a href=\"#i-9\"><span class=\"toc_number toc_depth_2\">3.2<\/span> \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/a><\/li><li><a href=\"#i-10\"><span class=\"toc_number toc_depth_2\">3.3<\/span> \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/a><\/li><\/ul><\/li><li><a href=\"#i-11\"><span class=\"toc_number toc_depth_1\">4<\/span> \u30af\u30e9\u30b9\u5909\u6570<\/a><ul><li><a href=\"#i-12\"><span class=\"toc_number toc_depth_2\">4.1<\/span> \u30af\u30e9\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/a><\/li><li><a href=\"#i-13\"><span class=\"toc_number toc_depth_2\">4.2<\/span> \u30af\u30e9\u30b9\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/a><\/li><\/ul><\/li><li><a href=\"#i-14\"><span class=\"toc_number toc_depth_1\">5<\/span> \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/a><ul><li><a href=\"#i-15\"><span class=\"toc_number toc_depth_2\">5.1<\/span> \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/a><\/li><li><a href=\"#i-16\"><span class=\"toc_number toc_depth_2\">5.2<\/span> \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/a><\/li><\/ul><\/li><li><a href=\"#i-17\"><span class=\"toc_number toc_depth_1\">6<\/span> \u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/a><ul><li><a href=\"#i-18\"><span class=\"toc_number toc_depth_2\">6.1<\/span> \u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/a><\/li><li><a href=\"#i-19\"><span class=\"toc_number toc_depth_2\">6.2<\/span> \u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/a><\/li><\/ul><\/li><li><a href=\"#i-20\"><span class=\"toc_number toc_depth_1\">7<\/span> \u30d6\u30ed\u30c3\u30af\u5909\u6570<\/a><ul><li><a href=\"#i-21\"><span class=\"toc_number toc_depth_2\">7.1<\/span> \u30d6\u30ed\u30c3\u30af\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/a><\/li><li><a href=\"#i-22\"><span class=\"toc_number toc_depth_2\">7.2<\/span> \u30d6\u30ed\u30c3\u30af\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/a><\/li><\/ul><\/li><li><a href=\"#i-23\"><span class=\"toc_number toc_depth_1\">8<\/span> \u7591\u4f3c\u5909\u6570<\/a><ul><li><a href=\"#self\"><span class=\"toc_number toc_depth_2\">8.1<\/span> self<\/a><\/li><li><a href=\"#true\"><span class=\"toc_number toc_depth_2\">8.2<\/span> true<\/a><\/li><li><a href=\"#false\"><span class=\"toc_number toc_depth_2\">8.3<\/span> false<\/a><\/li><li><a href=\"#nil\"><span class=\"toc_number toc_depth_2\">8.4<\/span> nil<\/a><\/li><\/ul><\/li><li><a href=\"#Ruby-3\"><span class=\"toc_number toc_depth_1\">9<\/span> \u3010\u307e\u3068\u3081\u3011Ruby\u306e\u5909\u6570\u3092\u7406\u89e3\u3057\u3066\u6d3b\u7528\u3057\u3088\u3046\uff01<\/a><\/li><\/ul><\/div>\n<p>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u300c<span class=\"marker\">\u5909\u6570<\/span>\u300d\u306f\u5e8f\u76e4\u306b\u5b66\u7fd2\u3059\u308b\u91cd\u8981\u306a\u8981\u7d20\u306e1\u3064\u3067\u3059\u3002\u958b\u767a\u3092\u52b9\u7387\u3088\u304f\u3001\u9069\u5207\u306b\u9032\u3081\u308b\u305f\u3081\u306b\u306f\u5909\u6570\u3092\u4f7f\u3044\u3053\u306a\u3055\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<br \/>\nRuby\u306b\u306f\u3044\u304f\u3064\u3082\u306e\u5909\u6570\u306e\u7a2e\u985e\u304c\u3042\u308b\u306e\u3067\u3001\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3084\u4f7f\u3044\u65b9\u3092\u628a\u63e1\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u3053\u3053\u3067\u306f\u3001<span class=\"marker\">Ruby\u306b\u304a\u3051\u308b\u5909\u6570\u306e\u7a2e\u985e\u3068\u5ba3\u8a00\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059<\/span>\u3002<\/p>\n<p>Ruby\u5b66\u7fd2\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b<\/p>\n<p><a href=\"https:\/\/meister-kentei.jp\/magazine\/programming\/4684\/\" target=\"_blank\" rel=\"noopener\">\u3010Ruby\u5165\u9580\u3011Ruby\u3067\u3067\u304d\u308b\u3053\u3068\u304b\u3089\u5165\u9580\u65b9\u6cd5\u307e\u3067\u89e3\u8aac\u3057\u307e\u3059<\/a><\/p>\n<p><a href=\"https:\/\/meister-kentei.jp\/magazine\/programming\/2473\/\" target=\"_blank\" rel=\"noopener\">Ruby\u72ec\u5b66\u306e\u79d8\u8a23\u306f\uff1f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u521d\u5fc3\u8005\u5411\u3051\u72ec\u5b66\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb<\/a><\/p>\n<h2><span id=\"Ruby\">Ruby\u306b\u304a\u3051\u308b\u5909\u6570\u3068\u306f<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5050\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/2316357_s.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/p>\n<p>\u305d\u3082\u305d\u3082\u3001Ruby\u306b\u304a\u3044\u3066\u5909\u6570\u3068\u306f\u4e00\u4f53\u3069\u306e\u3088\u3046\u306a\u3082\u306e\u306a\u306e\u3067\u3057\u3087\u3046\u304b\u3002<br \/>\n\u5909\u6570\u3068\u306f\u5024\u3092\u5165\u308c\u3066\u304a\u304f\u305f\u3081\u306e\u683c\u7d0d\u5eab\u306e\u3053\u3068\u3067\u3001Ruby\u306b\u9650\u3089\u305a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u8981\u7d20\u306e1\u3064\u3067\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u306fRuby\u306b\u304a\u3051\u308b\u5909\u6570\u3068\u3001\u5909\u6570\u3092\u7406\u89e3\u3059\u308b\u4e0a\u3067\u5927\u5207\u306a\u300c\u30b9\u30b3\u30fc\u30d7\u300d\u3068\u3044\u3046\u6982\u5ff5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3><span id=\"i\">\u5909\u6570\u3068\u306f<\/span><\/h3>\n<p>\u5909\u6570\u3068\u306f<span class=\"marker\">\u300c\u5024\u3092\u5165\u308c\u3066\u304a\u304f\u305f\u3081\u306e\u683c\u7d0d\u5eab\u300d<\/span>\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002<br \/>\n\u6570\u5024\u3084\u6587\u5b57\u3068\u3044\u3063\u305f\u5024\u3092\u5165\u308c\u3066\u304a\u304f\u3053\u3068\u304c\u3067\u304d\u3001\u4f55\u5ea6\u3082\u5225\u306e\u5024\u3092\u5165\u308c\u305f\u308a\u3001\u4eca\u5165\u3063\u3066\u3044\u308b\u5024\u3092\u78ba\u8a8d\u3057\u305f\u308a\u3001\u5909\u6570\u306b\u5165\u3063\u3066\u3044\u308b\u5024\u3092\u5225\u306e\u51e6\u7406\u306b\u5229\u7528\u3057\u305f\u308a\u3001\u3068\u3044\u3063\u305f\u4f7f\u3044\u65b9\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u3061\u306a\u307f\u306b\u3001\u5909\u6570\u306b\u5024\u3092\u5165\u308c\u308b\u3053\u3068\u3092<span class=\"marker\">\u300c\u4ee3\u5165\u3059\u308b\u300d<\/span>\u3068\u8a00\u3044\u307e\u3059\u3002<\/p>\n<p>\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u3067\u540c\u3058\u5024\u3092\u4f55\u5ea6\u3082\u7e70\u308a\u8fd4\u3057\u3066\u5229\u7528\u3067\u304d\u3001\u53ef\u8aad\u6027\u3082\u4e0a\u304c\u308b\u305f\u3081\u4f5c\u696d\u52b9\u7387\u3082\u826f\u304f\u306a\u308a\u307e\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u5909\u6570\u304c\u4f7f\u308f\u308c\u306a\u3044\u3053\u3068\u306f\u307b\u307c\u3042\u308a\u307e\u305b\u3093\u3002<br \/>\nRuby\u306b\u304a\u3044\u3066\u3082\u5909\u6570\u306f\u5927\u5207\u306a\u8981\u7d20\u3067\u3059\u3002<\/p>\n<h3><span id=\"i-2\">\u30b9\u30b3\u30fc\u30d7<\/span><\/h3>\n<p>\u5909\u6570\u306b\u306f<span class=\"marker\">\u300c\u30b9\u30b3\u30fc\u30d7\u300d<\/span>\u3068\u3044\u3046\u6982\u5ff5\u304c\u3042\u308a\u307e\u3059\u3002\u30b9\u30b3\u30fc\u30d7\u3068\u306f\u305d\u306e\u5909\u6570\u304c\u6709\u52b9\u306a\u7bc4\u56f2\u306e\u3053\u3068\u3067\u3001\u30b9\u30b3\u30fc\u30d7\u306e\u5916\u304b\u3089\u306f\u305d\u306e\u5909\u6570\u306f\u53c2\u7167\u3067\u304d\u307e\u305b\u3093\u3002\u5909\u6570\u306e\u7a2e\u985e\u306b\u3088\u3063\u3066\u30b9\u30b3\u30fc\u30d7\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u30b9\u30b3\u30fc\u30d7\u3092\u610f\u8b58\u3057\u306a\u304c\u3089\u5909\u6570\u3092\u6271\u3046\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002<\/p>\n<p>Ruby\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u76ee\u6307\u3057\u3066\u3044\u308b\u65b9\u306f\u3001\u307e\u305a\u30b9\u30b3\u30fc\u30d7\u306b\u3088\u308b\u5909\u6570\u306e\u9055\u3044\u3092\u6291\u3048\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3><span id=\"Ruby-2\">Ruby\u306e\u5909\u6570\u4e00\u89a7<\/span><\/h3>\n<p>\u305d\u308c\u3067\u306f\u3001Ruby\u3067\u4f7f\u308f\u308c\u308b\u5909\u6570\u3092\u4e00\u89a7\u3067\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<table class=\"color-top\" style=\"border-collapse: collapse; width: 100%;\">\n<tbody>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">\u5909\u6570\u540d<\/td>\n<td style=\"width: 50%; height: 24px;\">\u30b9\u30b3\u30fc\u30d7<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">\u30ed\u30fc\u30ab\u30eb\u5909\u6570<\/td>\n<td style=\"width: 50%; height: 24px;\">\u5ba3\u8a00\u3057\u305f\u30af\u30e9\u30b9\u30fb\u30e1\u30bd\u30c3\u30c9\u5185<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570<\/td>\n<td style=\"width: 50%; height: 24px;\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5168\u4f53<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">\u30af\u30e9\u30b9\u5909\u6570<\/td>\n<td style=\"width: 50%; height: 24px;\">\u5ba3\u8a00\u3057\u305f\u30af\u30e9\u30b9\u3001\u5b50\u5b6b\u30af\u30e9\u30b9\u5185<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/td>\n<td style=\"width: 50%; height: 24px;\">\u5ba3\u8a00\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5185<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/td>\n<td style=\"width: 50%; height: 24px;\">\u30af\u30e9\u30b9\u5185\u3067\u5ba3\u8a00\u3057\u305f\u5834\u5408\u306f\u30af\u30e9\u30b9\u5185<br \/>\n\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u5ba3\u8a00\u3057\u305f\u5834\u5408\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5185<\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 50%; height: 24px;\">\u30d6\u30ed\u30c3\u30af\u5909\u6570<\/td>\n<td style=\"width: 50%; height: 24px;\">\u30d6\u30ed\u30c3\u30af\u51e6\u7406\u5185<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u305d\u308c\u3067\u306f\u3053\u308c\u304b\u3089\u3001\u5404\u5909\u6570\u306b\u3064\u3044\u3066\u7279\u5fb4\u3084\u30b9\u30b3\u30fc\u30d7\u3001\u5ba3\u8a00\u65b9\u6cd5\u306a\u3069\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h2><span id=\"i-3\">\u30ed\u30fc\u30ab\u30eb\u5909\u6570<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5051\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/business-g3f7bf4786_1920.jpg\" alt=\"\" width=\"640\" height=\"358\" \/><\/p>\n<p><span class=\"marker\">\u30ed\u30fc\u30ab\u30eb\u5909\u6570<\/span>\u306f\u3001Ruby\u306e\u5909\u6570\u306e\u4e2d\u3067\u6700\u3082\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n<h3><span id=\"i-4\">\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3068\u306f<\/span><\/h3>\n<p>\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306f\u3001\u30b9\u30b3\u30fc\u30d7\u304c\u4e00\u756a\u72ed\u3044\u5909\u6570\u3067\u3059\u3002\u540c\u3058\u30af\u30e9\u30b9\u5185\u306e\u5909\u6570\u3067\u3042\u3063\u3066\u3082\u3001\u5ba3\u8a00\u3057\u305f\u5916\u5074\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u4f7f\u7528\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<h3><span id=\"i-5\">\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/span><\/h3>\n<p>\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306f\u3001\u5ba3\u8a00\u3057\u305f\u30af\u30e9\u30b9\u30fb\u30e1\u30bd\u30c3\u30c9\u306a\u3069\u5b9a\u7fa9\u3055\u308c\u305f\u5834\u6240\u306e\u7bc4\u56f2\u5185\u306e\u307f\u3067\u3059\u3002\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u8d85\u3048\u3066\u306e\u53c2\u7167\u306f\u3067\u304d\u305a\u3001\u53c2\u7167\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067<span class=\"marker\">\u300c\u30af\u30e9\u30b9\u300d<\/span>\u3084<span class=\"marker\">\u300c\u30e1\u30bd\u30c3\u30c9\u300d<\/span>\u3068\u3044\u3046\u8a00\u8449\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u304a\u304d\u307e\u3059\u3002\u30af\u30e9\u30b9\u3082\u30e1\u30bd\u30c3\u30c9\u3082\u3001\u5171\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u7279\u6709\u306e\u8003\u3048\u65b9\u3067\u3059\u3002\u30af\u30e9\u30b9\u3068\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u969b\u306e\u8a2d\u8a08\u56f3\u306b\u306a\u308b\u3082\u306e\u3092\u6307\u3057\u3001\u30e1\u30bd\u30c3\u30c9\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u306e\u30c7\u30fc\u30bf\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u52d5\u304d\u3092\u307e\u3068\u3081\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u300c\u8eca\u300d\u30921\u3064\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3060\u3068\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u3053\u306e\u6642\u3001\u5f79\u5272\u3092\u3082\u3063\u305f\u90e8\u54c1\u306e1\u30641\u3064\u3092\u300c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u300d\u3068\u6349\u3048\u308b\u306e\u304c\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u8003\u3048\u65b9\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u8eca\u306b\u306f\u300c\u30bf\u30a4\u30e4\u300d\u304c4\u3064\u5fc5\u8981\u3067\u3059\u3002\u3053\u306e\u30bf\u30a4\u30e4\u30924\u3064\u751f\u6210\u3059\u308b\u305f\u3081\u306e\u8a2d\u8a08\u56f3\u304c\u300c\u30af\u30e9\u30b9\u300d\u3068\u547c\u3070\u308c\u3001\u300c\u56de\u8ee2\u3059\u308b\u300d\u3068\u3044\u3063\u305f\u30bf\u30a4\u30e4\u306e\u52d5\u304d\u304c\u300c\u30e1\u30bd\u30c3\u30c9\u300d\u3067\u3059\u3002\u3061\u306a\u307f\u306b\u3001\u751f\u6210\u3055\u308c\u305f4\u3064\u306e\u30bf\u30a4\u30e4\u306f\u305d\u308c\u305e\u308c<span class=\"marker\">\u300c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u300d<\/span>\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u306b\u5bfe\u5fdc\u3057\u307e\u3059\u3002<\/p>\n<p>\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306f\u3001\u5ba3\u8a00\u3057\u305f\u30af\u30e9\u30b9\u5185\u90e8\u3084\u30e1\u30bd\u30c3\u30c9\u5185\u90e8\u3067\u3057\u304b\u4f7f\u3048\u307e\u305b\u3093\u3002\u30bf\u30a4\u30e4\u3092\u30d7\u30ed\u30b0\u30e9\u30e0\u3059\u308b\u306e\u306b\u4f7f\u308f\u308c\u305f\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3092\u3001\u30cf\u30f3\u30c9\u30eb\u3092\u30d7\u30ed\u30b0\u30e9\u30e0\u3059\u308b\u305f\u3081\u306b\u306f\u4f7f\u3048\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<h3><span id=\"i-6\">\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/span><\/h3>\n<p><span class=\"marker\">\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u5ba3\u8a00\u306f\u3001\u5c0f\u6587\u5b57\u304b_\u3067\u59cb\u3081\u307e\u3059\u3002<\/span><\/p>\n<p>\u4f8b\u3048\u3070\u3001<\/p>\n<div class=\"single__box-secondary\">\n<pre>name = \"Taro\"<\/pre>\n<\/div>\n<p>\u3068\u3044\u3063\u305f\u5f62\u3067\u5ba3\u8a00\u3057\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u6b21\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>class User\r\nuser = \"Taro\"\r\nputs user\r\nend\r\nputs user<\/pre>\n<\/div>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30af\u30e9\u30b9\u300cUser\u300d\u5185\u3067\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u300cuser\u300d\u3092\u5b9a\u7fa9\u3057\u3001\u300cputs user\u300d\u3067\u4e00\u5ea6\u51fa\u529b\u3057\u305f\u5f8c\u3001\u300cend\u300d\u3067\u30af\u30e9\u30b9\u3092\u7d42\u4e86\u3055\u305b\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001end\u306e\u5f8c\u306e\u300cputs user\u300d\u306f\u3001\u30af\u30e9\u30b9\u300cUser\u300d\u306e\u7bc4\u56f2\u5916\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u307f\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5b9f\u884c\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>Taro\r\nlocal.rb:5:in `&lt;main&gt;': undefined local variable or method `user' for main:Object (NameError)<\/pre>\n<\/div>\n<p>\u6700\u521d\u306e\u300cTaro\u300d\u306f\u3001\u6700\u521d\u306e\u300cputs user\u300d\u306e\u51fa\u529b\u7d50\u679c\u3067\u3059\u3002\u30af\u30e9\u30b9\u5185\u306e\u305f\u3081\u3001\u6b63\u5e38\u306b\u5909\u6570\u5185\u306e\u5024\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u307e\u3059\u306d\u3002<br \/>\n\u5bfe\u3057\u3066\u30012\u884c\u76ee\u306f\u30af\u30e9\u30b9\u5916\u306e\u300cputs user\u300d\u306e\u51fa\u529b\u7d50\u679c\u3067\u3059\u3002\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u300cuser\u300d\u306e\u30b9\u30b3\u30fc\u30d7\u7bc4\u56f2\u5916\u306e\u305f\u3081\u3001\u5909\u6570\u3092\u53c2\u7167\u3067\u304d\u305a\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306f\u9650\u3089\u308c\u305f\u30b9\u30b3\u30fc\u30d7\u5185\u3067\u3057\u304b\u6a5f\u80fd\u3057\u306a\u3044\u305f\u3081\u3001\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2><span id=\"i-7\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5053\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/24984778_s.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/p>\n<p>\u7d9a\u3044\u3066\u3001<span class=\"marker\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570<\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3><span id=\"i-8\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3068\u306f<\/span><\/h3>\n<p>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3068\u306f\u3001\u300c\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u300d\u3068\u306f\u53cd\u5bfe\u306b\u3001\u3069\u3053\u3067\u5b9a\u7fa9\u3057\u3066\u3082\u3069\u3053\u304b\u3089\u3067\u3082\u4f7f\u3048\u308b\u5909\u6570\u306e\u3053\u3068\u3067\u3059\u3002\u3069\u3053\u304b\u3089\u3067\u3082\u53c2\u7167\u3067\u304d\u308b\u305f\u3081\u4e00\u898b\u4fbf\u5229\u3067\u3059\u304c\u3001\u4ed6\u306e\u5909\u6570\u540d\u3068\u88ab\u3089\u306a\u3044\u3088\u3046\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<h3><span id=\"i-9\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/span><\/h3>\n<p>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5185\u5168\u3066\u3067\u3059\u3002<\/p>\n<h3><span id=\"i-10\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/span><\/h3>\n<p><span class=\"marker\">\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u5ba3\u8a00\u306f\u3001\u5909\u6570\u540d\u306e\u5148\u982d\u306b$\u3092\u4ed8\u3051\u307e\u3059\u3002<\/span>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>$user = \"Taro\"\r\n\r\ndef user_name\r\n puts \"This user is #{$user_name}\"\r\nend\r\n\r\nuser_name<\/pre>\n<\/div>\n<p>\u5b9f\u884c\u7d50\u679c\u3068\u3057\u3066\u306f\u3001<\/p>\n<div class=\"single__box-secondary\">\n<pre>This user is Taro<\/pre>\n<\/div>\n<p>\u3068\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5168\u4f53\u3067\u53c2\u7167\u3067\u304d\u308b\u5909\u6570\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2><span id=\"i-11\">\u30af\u30e9\u30b9\u5909\u6570<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5054\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/25153190_s-1.jpg\" alt=\"\" width=\"640\" height=\"478\" \/><\/p>\n<p>\u7d9a\u3044\u3066\u3001<span class=\"marker\">\u30af\u30e9\u30b9\u5909\u6570<\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3><span id=\"i-12\">\u30af\u30e9\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/span><\/h3>\n<p>\u30af\u30e9\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306f\u6587\u5b57\u901a\u308a\u30af\u30e9\u30b9\u5185\u90e8\u3067\u3059\u3002\u30af\u30e9\u30b9\u304a\u3088\u3073\u5b50\u5b6b\u30af\u30e9\u30b9\u3001\u305d\u3057\u3066\u305d\u306e\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5185\u3067\u53c2\u7167\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3><span id=\"i-13\">\u30af\u30e9\u30b9\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/span><\/h3>\n<p><span class=\"marker\">\u30af\u30e9\u30b9\u5909\u6570\u306e\u5ba3\u8a00\u306f\u3001\u5909\u6570\u540d\u306e\u5148\u982d\u306b@@\u3092\u4ed8\u3051\u307e\u3059\u3002<\/span>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>class User\r\n  def initialize(name)\r\n   @@name = name\r\n  end\r\n  def thisName\r\n   puts \"This User is #{@@name}\"\r\n  end\r\nend\r\n\r\nuser1 = User.new(\"Taro\")\r\nuser1.thisName\r\nuser2 = User.new(\"Jiro\")\r\nuser2.thisName\r\nuser1.thisName<\/pre>\n<\/div>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30af\u30e9\u30b9\u300cUser\u300d\u306e\u4e2d\u3067\u30af\u30e9\u30b9\u5909\u6570\u300c@@name\u300d\u3092\u5ba3\u8a00\u3057\u3066\u3044\u307e\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u300cthisName\u300d\u3067\u306f\u3001\u300cThis User is #{@@name}\u300d\u3068\u51fa\u529b\u3059\u308b\u3088\u3046\u306b\u8a18\u8ff0\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7d50\u679c\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>This User is Taro\r\nThis User is Jiro\r\nThis User is Jiro<\/pre>\n<\/div>\n<p>\u300cuser1.thisName\u300d\u306b\u3088\u3063\u3066\u300cThis User is Taro\u300d\u304c\u3001\u300cuser2.thisName\u300d\u306b\u3088\u3063\u3066\u300cThis User is Jiro\u300d\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n\u6700\u5f8c\u306e\u300cuser1.thisName\u300d \u306b\u3088\u3063\u3066\u300cThis User is Jiro\u300d\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u308b\u306e\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u65b0\u3057\u304f\u751f\u6210\u3057\u3066\u3044\u306a\u3044\u305f\u3081initialize\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u305a\u3001\u30af\u30e9\u30b9\u5909\u6570\u300c@@user\u300d\u306b\u300cJiro\u300d\u304c\u4ee3\u5165\u3055\u308c\u305f\u307e\u307e\u306b\u306a\u3063\u3066\u3044\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u30af\u30e9\u30b9\u5909\u6570\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u307e\u305f\u3044\u3067\u53c2\u7167\u3067\u304d\u308b\u5909\u6570\u3067\u3059\u3002<\/p>\n<h2><span id=\"i-14\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5055\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/23643298_s.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/p>\n<p>\u7d9a\u3044\u3066<span class=\"marker\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3><span id=\"i-15\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/span><\/h3>\n<p>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306f\u3001\u305d\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5185\u306e\u307f\u3067\u3059\u3002<\/p>\n<h3><span id=\"i-16\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/span><\/h3>\n<p><span class=\"marker\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u5ba3\u8a00\u306f\u3001\u5909\u6570\u540d\u306e\u5148\u982d\u306b\u300c@\u300d\u3092\u4ed8\u3051\u307e\u3059\u3002<\/span>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>class User\r\ndef initialize(name)\r\n@name = name\r\nend\r\n\r\ndef put_name\r\np @name\r\nend\r\nend\r\n\r\nuser1 = User.new(\"Taro\")\r\nuser2 = User.new(\"Jiro\")\r\nuser1.put_name\r\nuser2.put_name<\/pre>\n<\/div>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30af\u30e9\u30b9\u5185\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u300c@name\u300d\u3092\u5ba3\u8a00\u3057\u3066\u3044\u307e\u3059\u3002\u300cuser1\u300d\u3068\u300cuser2\u300d\u3068\u3044\u3046\u7570\u306a\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u305f\u5f8c\u3001put_name\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u7d50\u679c\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>\"Taro\"\r\n\"Jiro\"<\/pre>\n<\/div>\n<p>\u3053\u306e\u3088\u3046\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306f\u3001\u540c\u3058\u30af\u30e9\u30b9\u5185\u3067\u3042\u3063\u3066\u3082\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u9055\u3048\u3070\u5225\u306e\u5909\u6570\u3068\u3057\u3066\u53c2\u7167\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2><span id=\"i-17\">\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5056\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/data-5933101_640.jpg\" alt=\"\" width=\"640\" height=\"480\" \/><\/p>\n<p>\u7d9a\u3044\u3066\u3001<span class=\"marker\">\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3><span id=\"i-18\">\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/span><\/h3>\n<p>\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306f\u3001\u5b9a\u7fa9\u3055\u308c\u308b\u5834\u6240\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u30af\u30e9\u30b9\u5185\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u305d\u306e\u30af\u30e9\u30b9\u5185\u3067\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5185\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/p>\n<p>\u30af\u30e9\u30b9\u5909\u6570\u3068\u306f\u9055\u3044\u3001\u5b50\u5b6b\u30af\u30e9\u30b9\u304b\u3089\u306f\u53c2\u7167\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<h3><span id=\"i-19\">\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/span><\/h3>\n<p>\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u5ba3\u8a00\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u540c\u3058\u304f\u5909\u6570\u540d\u306e\u5148\u982d\u306b\u300c@\u300d\u3092\u4ed8\u3051\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2><span id=\"i-20\">\u30d6\u30ed\u30c3\u30af\u5909\u6570<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5057\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/coding-1853305_1920.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/p>\n<p>\u7d9a\u3044\u3066\u3001<span class=\"marker\">\u30d6\u30ed\u30c3\u30af\u5909\u6570<\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u30d6\u30ed\u30c3\u30af\u5909\u6570\u306f\u3001\u30d6\u30ed\u30c3\u30af\u5b9f\u884c\u306e\u969b\u306b\u4f7f\u308f\u308c\u308b\u5909\u6570\u3067\u3059\u3002<br \/>\n\u30d6\u30ed\u30c3\u30af\u3068\u306f\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u3053\u3068\u306e\u3067\u304d\u308b\u51e6\u7406\u306e\u304b\u305f\u307e\u308a\u306e\u3053\u3068\u3067\u3001\u7e70\u308a\u8fd4\u3057\u306a\u3069\u306e\u51e6\u7406\u3067\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n<h3><span id=\"i-21\">\u30d6\u30ed\u30c3\u30af\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7<\/span><\/h3>\n<p>\u30d6\u30ed\u30c3\u30af\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306f\u305d\u306e\u30d6\u30ed\u30c3\u30af\u5185\u3067\u3059\u3002\u30d6\u30ed\u30c3\u30af\u51e6\u7406\u3067\u4f7f\u308f\u308c\u308b\u4e00\u6642\u7684\u306a\u5909\u6570\u306e\u305f\u3081\u3001\u30d6\u30ed\u30c3\u30af\u51e6\u7406\u306e\u5916\u3067\u306f\u53c2\u7167\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<h3><span id=\"i-22\">\u30d6\u30ed\u30c3\u30af\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd5<\/span><\/h3>\n<p><span class=\"marker\">\u30d6\u30ed\u30c3\u30af\u51e6\u7406\u306e\u5ba3\u8a00\u306f\u3001\u30d6\u30ed\u30c3\u30af\u5185\u306e{}\u307e\u305f\u306f\u300cdo\uff5eend\u300d\u5185\u3067\u300c\uff5c\u300d\u3067\u56f2\u307f\u307e\u3059\u3002<\/span>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>[1, 2, 3].each do |i|\r\nputs i*2\r\nend<\/pre>\n<\/div>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u914d\u5217\u300c[1, 2, 3]\u300d\u306e\u305d\u308c\u305e\u308c\u30922\u500d\u3057\u3066\u51fa\u529b\u3059\u308b\u51e6\u7406\u3092\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002\u300c|i|\u300d\u306e\u90e8\u5206\u304c\u30d6\u30ed\u30c3\u30af\u5f15\u6570\u3067\u3001\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>2\r\n4\r\n6<\/pre>\n<\/div>\n<h2><span id=\"i-23\">\u7591\u4f3c\u5909\u6570<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5058\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/question-mark-g55d2c4648_1920.jpg\" alt=\"\" width=\"640\" height=\"440\" \/><\/p>\n<p>\u6700\u5f8c\u306b\u3001<span class=\"marker\">\u64ec\u4f3c\u5909\u6570<\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<br \/>\n\u64ec\u4f3c\u5909\u6570\u3068\u306f\u901a\u5e38\u306e\u5909\u6570\u3068\u306f\u7570\u306a\u308a\u3001\u5024\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u64ec\u4f3c\u5909\u6570\u306b\u306f\u4e00\u822c\u306b\u3001\u4ee5\u4e0b\u306e4\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>self<\/li>\n<li>true<\/li>\n<li>false<\/li>\n<li>nil<\/li>\n<\/ul>\n<p>\u305d\u308c\u305e\u308c\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u7c21\u5358\u306b\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h3><span id=\"self\">self<\/span><\/h3>\n<p><span class=\"marker\">self<\/span>\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u305d\u306e\u3082\u306e\u3092\u793a\u3059\u64ec\u4f3c\u5909\u6570\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>class User\r\ndef initialize\r\nend\r\ndef myself\r\nself\r\nend\r\nend\r\n\r\nputs User.new.myself<\/pre>\n<\/div>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30af\u30e9\u30b9\u300cUser\u300d\u306e\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u300cself\u300d\u3092\u53c2\u7167\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u30af\u30e9\u30b9\u300cUser\u300d\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u751f\u6210\u3055\u308c\u305f\u969b\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u305d\u306e\u3082\u306e\uff08self\uff09\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>#&lt;User:0x0000024ee96db390&gt;<\/pre>\n<\/div>\n<h3><span id=\"true\">true<\/span><\/h3>\n<p><span class=\"marker\">true<\/span>\u306f\u300c\u771f\u300d\u3092\u793a\u3059\u64ec\u4f3c\u5909\u6570\u3067\u3059\u3002if\u6587\u306e\u6761\u4ef6\u5f0f\u306a\u3069\u3067\u3088\u304f\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>if true then\r\nputs \"It is True\"\r\nend\r\n\r\nIt is True\u3000#\u5b9f\u884c\u7d50\u679c<\/pre>\n<\/div>\n<h3><span id=\"false\">false<\/span><\/h3>\n<p><span class=\"marker\">false<\/span>\u306ftrue\u3068\u53cd\u5bfe\u306b\u300c\u507d\u300d\u3092\u793a\u3059\u64ec\u4f3c\u95a2\u6570\u3067\u3059\u3002<\/p>\n<div class=\"single__box-secondary\">\n<pre>puts \"It is True\" unless false\r\n\r\nIt is True<\/pre>\n<\/div>\n<h3><span id=\"nil\">nil<\/span><\/h3>\n<p><span class=\"marker\">nil<\/span>\u3082false\u3068\u540c\u3058\u304f\u300c\u507d\u300d\u3092\u793a\u3059\u64ec\u4f3c\u95a2\u6570\u3067\u3059\u304c\u3001\u5358\u7d14\u306a\u300c\u507d\u300d\u3092\u793a\u3059false\u3068\u306f\u9055\u3044\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5b58\u5728\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2><span id=\"Ruby-3\">\u3010\u307e\u3068\u3081\u3011Ruby\u306e\u5909\u6570\u3092\u7406\u89e3\u3057\u3066\u6d3b\u7528\u3057\u3088\u3046\uff01<\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5059\" src=\"https:\/\/meister-kentei.jp\/magazine\/wp-content\/uploads\/2023\/03\/4977724_s.jpg\" alt=\"\" width=\"640\" height=\"427\" \/><\/p>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001Ruby\u306e\u5909\u6570\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002<br \/>\nRuby\u306e\u5909\u6570\u306f\u30b9\u30b3\u30fc\u30d7\u306e\u9055\u3044\u306b\u5fdc\u3058\u3066\u3044\u304f\u3064\u3082\u306e\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002\u30b9\u30b3\u30fc\u30d7\u3068\u5ba3\u8a00\u65b9\u6cd5\u3092\u610f\u8b58\u3057\u3066\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3057\u306a\u3044\u3068\u3001\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u306b\u306a\u3063\u305f\u308a\u3001\u53ef\u8aad\u6027\u3092\u640d\u306a\u3046\u6050\u308c\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u5909\u6570\u3092\u7406\u89e3\u3057\u3066\u3001Ruby\u30b9\u30ad\u30eb\u3092\u5411\u4e0a\u3055\u305b\u307e\u3057\u3087\u3046\uff01<\/p>\n<p>Ruby\u5b66\u7fd2\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3082\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><a href=\"https:\/\/meister-kentei.jp\/magazine\/programming\/4684\/\" target=\"_blank\" rel=\"noopener\">\u3010Ruby\u5165\u9580\u3011Ruby\u3067\u3067\u304d\u308b\u3053\u3068\u304b\u3089\u5165\u9580\u65b9\u6cd5\u307e\u3067\u89e3\u8aac\u3057\u307e\u3059<\/a><\/p>\n<p><a href=\"https:\/\/meister-kentei.jp\/magazine\/programming\/2473\/\" target=\"_blank\" rel=\"noopener\">Ruby\u72ec\u5b66\u306e\u79d8\u8a23\u306f\uff1f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u521d\u5fc3\u8005\u5411\u3051\u72ec\u5b66\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u76ee\u6b211 Ruby\u306b\u304a\u3051\u308b\u5909\u6570\u3068\u306f1.1 \u5909\u6570\u3068\u306f1.2 \u30b9\u30b3\u30fc\u30d71.3 Ruby\u306e\u5909\u6570\u4e00\u89a72 \u30ed\u30fc\u30ab\u30eb\u5909\u65702.1 \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3068\u306f2.2 \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d72.3 \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u5ba3\u8a00\u65b9\u6cd53 \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u65703.1 \u30b0\u30ed [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":5050,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-5032","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming"],"_links":{"self":[{"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/posts\/5032","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/comments?post=5032"}],"version-history":[{"count":11,"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/posts\/5032\/revisions"}],"predecessor-version":[{"id":5116,"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/posts\/5032\/revisions\/5116"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/media\/5050"}],"wp:attachment":[{"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/media?parent=5032"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/categories?post=5032"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/meister-kentei.jp\/magazine\/wp-json\/wp\/v2\/tags?post=5032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}