{"blog_title":"Camera Obscura","author_name":"obelisk2","type":"rich","width":"100%","description":"\u554f\u984c\uff1a 1\u03a9 \u306e\u62b5\u6297 10\u500b\u3092\u4f7f\u3044\u3001\u5408\u6210\u62b5\u6297\u304c\u9ec4\u91d1\u6bd4 1.6180339887..\u03a9\u306b\u3082\u3063\u3068\u3082\u8fd1\u3065\u304f\u5834\u5408\u306e\u5024\u3092\u3001\u5c11\u6570\u7b2c10\u4f4d\u307e\u3067\u6c42\u3081\u3088\u3002 a\u03a9 \u3068 b\u03a9 \u306e\u62b5\u6297\u3092\u3064\u306a\u3052\u308b\u5834\u5408\u3001\u76f4\u5217\u3064\u306a\u304e\u306b\u3059\u308c\u3070\u5408\u6210\u62b5\u6297\u306f\u305f\u3093\u306b a + b \u03a9 \u306b\u306a\u308a\u307e\u3059\u304c\u3001\u4e26\u5217\u3064\u306a\u304e\u306e\u5834\u5408\u306f\u305d\u308c\u3089\u306e\u9006\u6570\u306e\u548c\u306e\u9006\u6570\u3001\u3064\u307e\u308a \u306b\u306a\u308b\u306e\u304c\u91cd\u8981\u306a\u3068\u3053\u308d\u3067\u3059\u3002\u62b5\u629710\u500b\u3067\u304d\u308f\u3081\u3066\u8907\u96d1\u306a\u7d44\u307f\u5408\u308f\u305b\u3092\u3064\u304f\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Ruby \u3067\u6c42\u3081\u3066\u307f\u307e\u3057\u305f\u3002 require 'set' def product(a, b) @ar[a].each do |i| @ar[b].each do |j| @ar[a + b] << i + j @ar[a\u2026","image_url":"http://www.codecogs.com/png.latex?%5Cfrac%7B1%7D%7B%5Cfrac%7B1%7D%7Ba%7D+%5Cfrac%7B1%7D%7Bb%7D%7D","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fobelisk.hatenablog.com%2Fentry%2F2017%2F05%2F26%2F203031\" title=\"1\u03a9\u306e\u62b5\u629710\u500b\u3067\u9ec4\u91d1\u6bd4\u306e\u5024\u306b\u8fd1\u3065\u3051\u308b\uff08Ruby\uff09 - Camera Obscura\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_name":"Hatena Blog","height":"190","provider_url":"https://hatena.blog","blog_url":"https://obelisk.hatenablog.com/","version":"1.0","categories":["Ruby","\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0","\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u30fb\u30d1\u30ba\u30eb"],"published":"2017-05-26 20:30:31","author_url":"https://blog.hatena.ne.jp/obelisk2/","url":"https://obelisk.hatenablog.com/entry/2017/05/26/203031","title":"1\u03a9\u306e\u62b5\u629710\u500b\u3067\u9ec4\u91d1\u6bd4\u306e\u5024\u306b\u8fd1\u3065\u3051\u308b\uff08Ruby\uff09"}