{"title":"Ruby\u3067\u306f!\u3084+\u3084-\u306f\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u3082\u4f7f\u3048\u308b","published":"2026-01-23 23:29:20","author_url":"https://blog.hatena.ne.jp/kamatimaru/","width":"100%","url":"https://kamatimaru.hatenablog.com/entry/2026/01/23/232920","version":"1.0","provider_name":"Hatena Blog","image_url":null,"categories":["Ruby"],"blog_title":"delhi09\u306e\u52c9\u5f37\u65e5\u8a18","provider_url":"https://hatena.blog","description":"\u30bf\u30a4\u30c8\u30eb\u306e\u901a\u308a\u3067\u3059\u304c\u3001Ruby\u3067\u306f!\u3084+\u3084-\u306f\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u3082\u4f7f\u3048\u308b\u3068\u3044\u3046\u3053\u3068\u3092\u77e5\u308a\u307e\u3057\u305f\u3002 !\"abc\".include?(\"a\")\u3068\u3044\u3046\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3082\u66f8\u3051\u307e\u3059\u3002 irb(main):006> \"abc\".include?(\"a\").! => false \u3082\u3063\u3068\u7d14\u7c8b\u5316\u3059\u308b\u3068\u3001!true\u306ftrue.!\u3068\u540c\u3058\u3067\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002 irb(main):010> true.! => false +\u3084-\u3082\u540c\u69d8\u3067\u3059\u3002 irb(main):008> 1.+ 2 => 3 irb(main):009> 3.- 2 => 1 \u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u30ea\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u3057\u3066\u3044\u305f\u3089\u3053\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u3092\u898b\u304b\u3051\u3066\u5206\u304b\u3089\u305a\u3001A\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkamatimaru.hatenablog.com%2Fentry%2F2026%2F01%2F23%2F232920\" title=\"Ruby\u3067\u306f!\u3084+\u3084-\u306f\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u3082\u4f7f\u3048\u308b - delhi09\u306e\u52c9\u5f37\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"kamatimaru","blog_url":"https://kamatimaru.hatenablog.com/","type":"rich","height":"190"}