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Why can't strings be mutable in Java and .NET?

...en somehow you manage to change the file name you can request to open "passwd" file or any other. Then a file can be modified and it will be possible to login directly to OS. Second - Memory efficiency http://hikrish.blogspot.com/2006/07/why-string-class-is-immutable.html JVM internall...
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实现一个简单的服务端推方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...时性较差。虽然可以通过加快轮询频率的方式来缓解这个问题,但相应付出的代价也不小:一来会使负载居高不下,二来也会让带宽捉襟见肘。 再来说说Long Polling,如果使用传统的LAMP技术去实现的话,大致如下所示: Long Pol...
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Function to calculate distance between two coordinates

... 这个问题问了JavaScript的答案。. You have to convert it to english :) – VulfCompressor Oct 12 '15 at 15:56 ...
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“Keep Me Logged In” - the best approach

... hash_hmac('sha256', $cookie, SECRET_KEY); $cookie .= ':' . $mac; setcookie('rememberme', $cookie); } Then, to validate: function rememberMe() { $cookie = isset($_COOKIE['rememberme']) ? $_COOKIE['rememberme'] : ''; if ($cookie) { list ($user, $token, $mac) = explode(':', ...
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Can PHP PDO Statements accept the table or column name as parameter?

...(e.g. array('u'=>'users', 't'=>'table', 'n'=>'nonsensitive_data') etc.) – Kzqai Dec 22 '11 at 18:05 ...
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MySQL: Enable LOAD DATA LOCAL INFILE

... thx. btw, the my.cnf path is /etc/mysql/my.cnf in my machine (AWS EC2). – SparkAndShine Jun 16 '15 at 15:34 ...
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VideoRecorder 拓展:前台预览录制 + 后台无预览录制,支持分辨率、码率设...

...率对照表(BitRate) Quality 预设值 注意事项 问题解决历程 用户写了长长的感谢信: 拓展下载 « 返回首页 VideoRecorder视频录制拓展 拓展开发起由:有用户询问 千问Max版 说我们有...
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“互联网卖菜”没那么简单 创业者不要盲目跟风 - 资讯 - 清泛网 - 专注C/C+...

...自提的鲜果说,还是送菜上门的七天买菜网,都因为价格问题导致的盈利困境而歇业,价格是上门送菜的最大障碍,要么狂砸补贴,要么把量做大,维持开支,没有别的路。笔者接触过一些做上门送菜的创业者,往往会问第一个...
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How to use FormData for AJAX file upload?

...alse, // NEEDED, DON'T OMIT THIS // ... Other options like success and etc }); After this it will send ajax request like you submit regular form with enctype="multipart/form-data" Update: This request cannot work without type:"POST" in options since all files must be sent via POST request. ...
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reStructuredText tool support

... various output formats, automatically producing cross-references, indices etc. rest2web rest2web is a simple tool that lets you build your website from a single template (or as many as you want), and keep the contents in reStructuredText. Pygments Pygments is a generic syntax highlighter for ge...