{"title":"\u3010Ruby\u3011\u6587\u5b57\u5217\u306e\u5927\u6587\u5b57\u30fb\u5c0f\u6587\u5b57\u5909\u63db\u307e\u3068\u3081\uff08upcase\u30fbdowncase\u30fbcapitalize\u30fbswapcase\uff09","image_url":null,"description":"upcase\uff1a\u5927\u6587\u5b57\u5909\u63db upcase\u306f\u5168\u3066\u306e\u6587\u5b57\u3092\u5927\u6587\u5b57\u306b\u7f6e\u304d\u63db\u3048\u305f\u6587\u5b57\u5217\u3092\u8fd4\u3059\u3002 upcase!\u306f\u7834\u58ca\u7684\u306b\u7f6e\u304d\u63db\u3048\u308b\u3002 str = \"Hello ruby\" # upcase\u306f\u5143\u306e\u6587\u5b57\u5217\u306f\u305d\u306e\u307e\u307e p str.upcase #=> \"HELLO RUBY\" p str #=> \"Hello ruby\" # upcase!\u306f\u5143\u306e\u6587\u5b57\u5217\u3092\u66f4\u65b0(\u7834\u58ca\u7684) p str.upcase! #=> \"HELLO RUBY\" p str #=> \"HELLO RUBY\" downcase\uff1a\u5c0f\u6587\u5b57\u5909\u63db downcase\u306f\u5168\u3066\u306e\u6587\u5b57\u3092\u5c0f\u6587\u5b57\u306b\u7f6e\u304d\u63db\u3048\u305f\u6587\u5b57\u5217\u3092\u8fd4\u3059\u3002 downcase!\u306f\u7834\u58ca\u7684\u306b\u7f6e\u304d\u63db\u3048\u308b\u3002 \u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fml-rand-note.hatenablog.com%2Fentry%2Fruby%2Fupcase-downcase\" title=\"\u3010Ruby\u3011\u6587\u5b57\u5217\u306e\u5927\u6587\u5b57\u30fb\u5c0f\u6587\u5b57\u5909\u63db\u307e\u3068\u3081\uff08upcase\u30fbdowncase\u30fbcapitalize\u30fbswapcase\uff09 - \u30e9\u30f3\u30c9ML\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2026-06-19 07:35:24","url":"https://ml-rand-note.hatenablog.com/entry/ruby/upcase-downcase","author_url":"https://blog.hatena.ne.jp/round-rand/","height":"190","width":"100%","blog_title":"\u30e9\u30f3\u30c9ML","provider_url":"https://hatena.blog","blog_url":"https://ml-rand-note.hatenablog.com/","author_name":"round-rand","version":"1.0","provider_name":"Hatena Blog","categories":["Ruby"],"type":"rich"}