{"image_url":null,"provider_url":"https://hatena.blog","published":"2013-06-06 00:10:43","type":"rich","title":"0.1\u309210\u56de\u8db3\u3057\u305f\u7dcf\u548c\u306f1.0\u3068\u7b49\u3057\u3044\u304b\uff1f","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frochefort.hatenablog.com%2Fentry%2F2013%2F06%2F06%2F001043\" title=\"0.1\u309210\u56de\u8db3\u3057\u305f\u7dcf\u548c\u306f1.0\u3068\u7b49\u3057\u3044\u304b\uff1f - rochefort&#39;s blog\" 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":"rochefort","width":"100%","categories":["ruby","gold"],"author_url":"https://blog.hatena.ne.jp/rochefort/","description":"ruby gold\u5bfe\u7b56\u3002 \u305d\u3046\u3044\u3048\u3070\u8a66\u9a13\u3067\u3001\u3053\u3093\u306a\u306e\u304c\u51fa\u307e\u3057\u305f\u3002 0.1\u309210\u56de\u8db3\u3057\u305f\u7dcf\u548c\u306f1.0\u3068\u7b49\u3057\u3044\u304b\uff1f >> sum=0;10.times.each{ |x| sum+=0.1 } => 10 >> sum == 1.0 \u7b54\u3048\u306ffalse\uff08\u7b49\u3057\u304f\u306a\u3044\uff09\u306a\u3093\u3067\u3059\u304c\u3001 >> sum == 1.0 => false >> sum => 0.9999999999999999 \u3053\u308c\u306f\u6d6e\u52d5\u5c0f\u6570\u70b9\u306e\u8a08\u7b97\u306e\u8a71\u3067ruby\u3042\u3093\u307e\u308a\u95a2\u4fc2\u306a\u3044\u306a\u3041\u3068\u601d\u3044\u306a\u304c\u3089\u89e3\u3044\u3066\u3044\u307e\u3057\u305f\u3002","version":"1.0","blog_title":"rochefort's blog","url":"https://rochefort.hatenablog.com/entry/2013/06/06/001043","blog_url":"https://rochefort.hatenablog.com/","height":"190"}