{"url":"https://iken0.hatenadiary.org/entry/20070518/p4","image_url":null,"blog_url":"https://iken0.hatenadiary.org/","width":"100%","published":"2007-05-18 00:00:04","description":"p \"ff\".hex #=> 255 p sprintf(\"0x%04x\", \"a5\".hex) # 16\u9032\u6570\u306b\u3059\u308b #=> \"0x00a5\" p [0,16,32,128,255].pack('c*').unpack('H*') #=> [\"00102080ff\"] p [\"ff20\"].pack('H*').unpack('C*') # \u7b26\u53f7\u7121\u3057 #=> [255, 32] p [\"ff20\"].pack('H*').unpack('c*') # \u7b26\u53f7\u3042\u308a #=> [-1, 32] p 0xffff.to_s(10) #=> \"65535\" p 31.to_s(16) #=> \"1f\"","author_url":"https://blog.hatena.ne.jp/iken0/","blog_title":"\u30ed\u30d0\u306e\u8033","title":"16\u9032\u6570\u309210\u9032\u6570\u306b\u3059\u308b","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fiken0.hatenadiary.org%2Fentry%2F20070518%2Fp4\" title=\"16\u9032\u6570\u309210\u9032\u6570\u306b\u3059\u308b - \u30ed\u30d0\u306e\u8033\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["ruby","number"],"height":"190","version":"1.0","author_name":"iken0","provider_name":"Hatena Blog","type":"rich","provider_url":"https://hatena.blog"}