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JPA or JDBC, how are they different?

I am learning Java EE and I downloaded the eclipse with glassfish for the same. I saw some examples and also read the Oracle docs to know all about Java EE 5. Connecting to a database was very simple. I opened a dynamic web project, created a session EJB , I used EntityManager and with the get meth...
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How to extract numbers from a string in Python?

... would argue that this is better than the regex example because you don't need another module and it's more readable because you don't need to parse (and learn) the regex mini-language. This will not recognize floats, negative integers, or integers in hexadecimal format. If you can't accept these l...
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vc第三方界面库BCGControlBar与Xtreme Toolkit对比 - C/C++ - 清泛网 - 专注C/C++及内核技术

...port Control, Shortcut Bar, Syntax Edit, Skin Framework 和 Task Panel。 安装过程 BCGControlBar的安装过程可谓一波三折,因为最新版本是v22.1,要求VC++6.0的版本是SP6,最好把VC++的MSDN也安装上。而最开始的时候我以为有了VS2008的MSDN就不需要VC++...
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Linux编译安装软件configure参数(持续更新) - 开源 & Github - 清泛网 - ...

Linux编译安装软件configure参数(持续更新)configure_paramPHP configure参数,Squid configure参数,MySQL configure参数,Postfix configure参数,Courier configure参数,Sasl2 configure参数 等。PHP configure参数: ./configure --prefix=/usr/local/php --with-gd=/usr/lo...
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一体化的Linux系统性能和使用活动监控工具–Sysstat - 更多技术 - 清泛网 -...

...量“SA_DIR”定义给sa1和sa2使用的新目录。 在Linux环境下安装Sysstat 这个“Sysstat”软件当然是可以在主要的Linux发行版的软件仓库中获得并安装。但是,这个从软件库里获得的软件是缩小版的而且是旧版。所以,这就是为...
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php动态安装mysql扩展错误(ext/mysqlnd/mysqlnd.h: No such file or direc...

php动态安装mysql扩展错误(ext/mysqlnd/mysqlnd.h: No such file or directory)错误如下:In file included from data xingzheng install php-5.5.10 include php Zend zend_compile.h:719, from ...错误如下: In file included from /data/xingzheng/install/php-5.5.10/include/php/...
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微软Win7/Win8自带 tsmmc.msc 远程桌面管理工具(多账号的mstsc远程桌面) ...

...个,方法如下: 这里还可以起别名,很方便。 怎么安装呢? 第一步是先安装一下这个补丁,下载地址: 32位版: http://download.microsoft.com/do ... -x86-RefreshPkg.msu 64位版: http://download.microsoft.com/do ... -x64-RefreshPkg.msu 安装...
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MySql安装配置 - 爬虫/数据库 - 清泛IT社区,为创新赋能!

1.下载服务器端,解压 2.安装Mysql服务: 进入bin目录,mysqld.exe --install (指定安装的MySql服务名)。 (卸载 net stop servicename;             mysqld.exe --remove servicename) 3.进入MySql命令模式: mysql.exe(...
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Intel HAXM 安装失败?Hyper-V or Intel HAXM 你得二选一 - App Inventor 2...

...两者不兼容。如果不禁用 Hyper-V,直接重装 HAXM 的话,在安装过程中就会报错。 管理员权限执行命令以关闭Hyper-v,这样才能安装HAXM,启动安卓模拟器: bcdedit /set hypervisorlaunchtype off复制代码如未生效,则需重启电脑。 https:...
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What browsers support HTML5 WebSocket API?

...S 4.2 + iOS 5 Firefox 4.0 - support for WebSockets disabled. To enable it see here. Opera 11 - with support disabled. To enable it see here. HyBi-07+: Chrome 14.0 Firefox 6.0 - prefixed: MozWebSocket IE 9 - via downloadable Silverlight extension HyBi-10: Chrome 14.0 + 15.0 Firefox 7.0 + 8.0 + ...