{"categories":["Perl"],"provider_name":"Hatena Blog","type":"rich","width":"100%","height":"190","image_url":null,"description":"pack, unpack\u306e\u4f7f\u3044\u65b9 print unpack('H*', '@gmail.com'); 40676d61696c2e636f6d print pack('H*', '40676d61696c2e636f6d'); @gmail.com print unpack('h*', '@gmail.com'); <--h\u3060\u3068\u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\u304c\u9006\u306b\u306a\u308b\u3002 0476d61696c6e236f6d6 print pack('h*', '0476d61696c6e236f6d6'); @gmail.com","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyoshifumi.hateblo.jp%2Fentry%2F20060715%2F1152919829\" title=\" \u95a2\u6570\u30e1\u30e2 - yoshifumi1975&#39;s diary\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","version":"1.0","author_url":"https://blog.hatena.ne.jp/yoshifumi1975/","blog_title":"yoshifumi1975's diary","published":"2006-07-15 08:30:29","title":" \u95a2\u6570\u30e1\u30e2","provider_url":"https://hatena.blog","author_name":"yoshifumi1975","url":"https://yoshifumi.hateblo.jp/entry/20060715/1152919829","blog_url":"https://yoshifumi.hateblo.jp/"}