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内存调试技巧:C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术

...他许多通用语言(如 Java™、Ruby、Haskell、C#、Perl、Smalltalk 等),每种语言都有众多爱好者和各自优点。但是,从计算角度来看,每种编程语言优于 C 或 C++ 主要优点都与便于内存管理密切相关。与内存相关编程是如...
https://www.tsingfun.com/it/tech/1060.html 

闲扯Nginxaccept_mutex配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...际上Nginx作者Igor Sysoev曾经给过相关解释: OS may wake all processes waiting on accept() and select(), this is called thundering herd problem. This is a problem if you have a lot of workers as in Apache (hundreds and more), but this insensible if you have just several workers as ...
https://www.tsingfun.com/it/tech/1472.html 

LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...集。 例2.3 sets: product/A B/; machine/M N/; week/1..2/; allowed(product,machine,week):x; endsets LINGO生成了三个父集所有组合共八组作为allowed集成员。列表如下: 编号 成员 1 (A,M,1) 2 2 (A,M,2...
https://www.tsingfun.com/it/cpp/1616.html 

如何获取IE (控件)所有链接(包括Frameset, iframe) - C/C++ - 清泛网 -...

...(包括Frameset, iframe)IE 顶层 body 节点通过IHTMLElement->get_all 方法无法获取iframe 里面节点列表:CComPtr<IHTMLElement> body;...CComPtr<IDispatc...IE 顶层 body 节点通过IHTMLElement->get_all 方法无法获取iframe 里面节点列表: CComPtr<IHTMLElement> b...
https://www.tsingfun.com/it/cpp/763.html 

自动生成Linux下Makefile全攻略(automake原理) - C/C++ - 清泛网 - 专注C/C++及内核技术

...configure 输出Makefile文件 2、make 输出二进制 3、make install 安装二进制到指定目录 make及make install规则都需要参照Makefile文件,而Makefile是自动生成,大家有兴趣可以查看下Makefile,代码很长很复杂。当然我们可以直接在Mak...
https://www.fun123.cn/reference/other/IoT.html 

使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网

...hyay, D., & Sen, J. (2011). Internet of things: Applications and challenges in technology and standardization. Wireless Personal Communications, 58(1), 4969. [2] Wolber, D., Abelson, H., Spertus, E., & Looney, L. (2011). App Inventor. ” O’Reilly Media, Inc.”. [3] Macke...
https://www.tsingfun.com/it/cpp/1279.html 

了解 Boost Filesystem Library - C/C++ - 清泛网 - 专注C/C++及内核技术

...即使其他程序在访问同一文件也如此! unsigned long remove_all(const path& p):此 API 尝试删除路径 p 所引用文件或目录。与 remove 不同,此函数并不会特殊考虑不为空目录。此函数是 UNIX rm &ndash;rf 命令 Boost 对等项。 实用工具...
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Ora-00257 错误处理一列 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

... 没有问题 查看权限 ll .bash_profile -rw--rw--- 1 oracle oinstall 529 10鏈?24 20:18 /home/oracle/.bash_profile 有问题。修改权限 chmod 775 /home/oracle/.bash_profile 进入ORLACE sqlplus /as sysdba SQL> select * from v$log; GROUP# THREAD# SEQUE...
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如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注IT技能提升

...g algorithm to choose for your classification problem? Of course, if you really care about accuracy, your best bet is to test out a couple different ones (making sure to try different parameters within each algorithm as well), and select the best one by cross-validation. But if you&rsquo;re simply l...
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如何选择机器学习算法 - 大数据 & AI - 清泛网 - 专注IT技能提升

...g algorithm to choose for your classification problem? Of course, if you really care about accuracy, your best bet is to test out a couple different ones (making sure to try different parameters within each algorithm as well), and select the best one by cross-validation. But if you&rsquo;re simply l...