大约有 2,200 项符合查询结果(耗时:0.0415秒) [XML]

https://www.tsingfun.com/it/cp... 

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

...要补充性的 fclose。在没有 fclose() 的情况下,C 标准不能指定发生的情况时,很可能是内存泄漏。其他资源(如信号量、网络句柄、数据库连接等)同样值得考虑。 内存错误分配 错误分配的管理不是很困难。下面是一个示例(...
https://stackoverflow.com/ques... 

Could you explain STA and MTA?

... thread and cannot be passed to other threads (much like any UI element in MFC). However, your program can still have many threads. MTA - You can manipulate the COM object on any thread in your program. share | ...
https://stackoverflow.com/ques... 

Why the switch statement cannot be applied on strings?

...f apparently not @MarmouCorp above but http://www.codeguru.com/cpp/cpp/cpp_mfc/article.php/c4067/Switch-on-Strings-in-C.htm Uses two maps to convert between the strings and the class enum (better than plain enum because its values are scoped inside it, and reverse lookup for nice error messages). ...
https://www.tsingfun.com/it/tech/1207.html 

Java 理论与实践: 线程池与工作队列 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...如果程序必须等待诸如 I/O 完成这样的某个资源,那么请指定最长的等待时间,以及随后是失效还是将任务重新排队以便稍后执。这样做保证了:通过将某个线程释放给某个可能成功完成的任务,从而将最终取得 某些进展。 ...
https://bbs.tsingfun.com/thread-1442-1-1.html 

【App Inventor 2 数据可视化】使用柱状图和饼图收集数据 - App应用开发 - ...

...化组件来自App Inventor的布局抽屉。 horizontalarrangement4包含删除应用程序中所有数据的重置按钮。 3. 查看代码:点击App Inventor中的Blocks逻辑设计查看初始项目的代码: 第2部分:在应用中添加图表4. 使用图表组件(<font class=&quo...
https://www.tsingfun.com/ilife/tech/1934.html 

一文讲透区块链技术原理 - 资讯 - 清泛网 - 专注C/C++及内核技术

...到区块链的最后,则此区块的数据记录就再也不能改变或删除。这个特点保证了数据库的严谨性,即无法被篡改。 顾名思义,区块链就是区块以链的方式组合在一起,以这种方式形成的数据库我们称之为区块链数据库。区块链...
https://stackoverflow.com/ques... 

Why do C++ libraries and frameworks never use smart pointers?

...reinvents the wheel. Even strings, Qt has QString, wxWidgets has wxString, MFC has the horribly named CString. Isn't a UTF-8 std::string good enough for 99% of GUI tasks? – Inverse Apr 26 '12 at 19:43 ...
https://stackoverflow.com/ques... 

throw new std::exception vs throw std::exception

...tions#what-to-catch https://isocpp.org/wiki/faq/exceptions#catch-by-ptr-in-mfc Basically "unless there's a good reason not to, catch by reference. Avoid catching by value, since that causes a copy to be made and the copy can have different behavior from what was thrown. Only under very special cir...
https://www.tsingfun.com/it/tech/717.html 

由12306.cn谈谈网站性能技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...中心的票量数据,这是不一样的。不要觉得网游或是QQ能你就以为这是一样的。网游和QQ 的后端负载相对于电子商务的系统还是简单。 其二,有人说春节期间订火车的这个事好像网站的秒杀活动。的确很相似,但是如果你...
https://www.tsingfun.com/ilife/tech/612.html 

那些微信公众大号是如何赚钱的? - 资讯 - 清泛网 - 专注C/C++及内核技术

...争对手恶意举报,微信的很多规则也在变,文章很容易被删除,没有安全感。 P2P观察:微信平台的很多规则,不是十分透明完善,出现什么问题,很难取得有效沟通效果。 味茗美食团:在运营过程中提高公众号影响力,多方...