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Closing JDBC Connections in Pool
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Thats what it is doing (initialize once), isnt it? ds is an instance variable, and if (ds == null) ... is the initialization part.
– Manidip Sengupta
Feb 8 '11 at 21:22
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今年全球重大数据泄露事件盘点 - 资讯 - 清泛网 - 专注C/C++及内核技术
今年全球重大数据泄露事件盘点今天大麦网数据泄露的消息把不少人吓了一跳。尽管大麦网随即证实是在2014年发生的攻击，但还是让人余悸未消。还记得前几天“偷情地图”网站数据泄露造成的用户自杀的事件吧，在这个大数...
创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...化视图问题我们采用Oracle的物化视图增量刷新机制定时将数据库A上的某个表的数据同步到另一个数据库B上。我们常用的最简单的实现步骤是这样。首先在数...我们采用Oracle的物化视图增量刷新机制定时将数据库A上的某个表的数...
C++ 读写xml方法整理（持续更新） - C/C++ - 清泛网 - 专注C/C++及内核技术
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else
{
LOG_ERROR(_T("配置文件%s 错误！"), szFile);
}
GetAttrib获取节点属性，GetData获取节点值。
二、tinyxml2 下载：
特点：也是两个文件，小巧灵活，且跨平台。
读xml：
tinyxml2::XMLDocument doc;
try
{
if(doc.LoadFile(szFile) == 0...
Simplest way to detect a mobile device in PHP
...|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(2...
Downcasting shared_ptr to shared_ptr?
...cast or dynamic_cast, and you wish you could have a little bit of both worlds. It is well known that dynamic_cast has a runtime overhead, but it is safer, whereas static_cast has no overhead at all, but it may fail silently. How nice it would be if you could use shared_dynamic_cast in debug builds, ...
What is the best practice for “Copy Local” and with project references?
...t it does not include transitively
referenced projects. Since this leads to enormous memory
consumption and is not needed since we use the single
output directory strategy.
============================================================
GetCopyToOutputDirectoryItems
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MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
MongoDB数据导出导入工具：mongoexport,mongoimport导出导入工具mongoexport、mongoimport，Mongodb中的mongoexport工具可以把一个collection导出成JSON格式或CSV格式的文件，可以通过参数指定导出的数据项；mongoimport将相应文件导入到collection中。一...
Purpose of ESI & EDI registers?
...ning. What you do is you set up SI and/or DI to point at one or both operands, perhaps put a count in CX and then let 'er rip. These are operations that work on a bunch of bytes at a time, and they kind of put the CPU in automatic. Because you're not explicitly coding loops, they do their thing more...
海量数据相似度计算之simhash和海明距离 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
海量数据相似度计算之simhash和海明距离通过采集系统我们采集了大量文本数据，但是文本中有很多重复数据影响我们对于结果的分析。分析前我们需要对这些数据去除重复，如何选择和设 通过 采集系统 我们采集了大量文本数...