{"categories":["Ruby"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fgouf.hatenablog.com%2Fentry%2F2020%2F09%2F21%2F203803\" title=\"3\u30b1\u30bf\u306e\u6570\u5b57\u304b\u3089\u300c\u30ab\u30d7\u30ec\u30ab\u6570\u300d\u3092\u63a2\u3059 - \u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/innocent-zero/","title":"3\u30b1\u30bf\u306e\u6570\u5b57\u304b\u3089\u300c\u30ab\u30d7\u30ec\u30ab\u6570\u300d\u3092\u63a2\u3059","blog_url":"https://gouf.hatenablog.com/","published":"2020-09-21 20:38:03","description":"3\u30b1\u30bf\u306e\u6570\u5b57\u304b\u3089\u898b\u3064\u304b\u308b \u30ab\u30d7\u30ec\u30ab\u6570 \u306f\u300c495\u300d\u304c\u552f\u4e00\u3089\u3057\u3044 \u4e0e\u3048\u3089\u308c\u305f\u6570\u5024\u306b\u5bfe\u3057\u3066\u300c\u30ab\u30d7\u30ec\u30ab\u64cd\u4f5c\u300d\u3092\u5b9f\u884c\u3057\u3001\u5024\u304c\u304a\u306a\u3058\u306b\u306a\u308b\u3082\u306e\u306e\u6570\u3092\u63a2\u3057\u3066\u307f\u305f \u30eb\u30fc\u30d7\u51e6\u7406\u3067\u30b4\u30ea\u62bc\u3057 def kaprekar_manipulate(n) # \u6841\u6570\u3092\u6607\u9806\u30fb\u964d\u9806\u306b\u4e26\u3079\u66ff\u3048\u308b max = n.to_s .chars .map(&:to_i) .sort .reverse .map(&:to_s) .join .to_i min = n.to_s .chars .map(&:to_i) .sort .map(&:to_s) .join .to_i # for debug # pp max # pp min max\u2026","blog_title":"\u30d6\u30ed\u30b0","width":"100%","provider_name":"Hatena Blog","type":"rich","version":"1.0","height":"190","url":"https://gouf.hatenablog.com/entry/2020/09/21/203803","image_url":null,"provider_url":"https://hatena.blog","author_name":"innocent-zero"}