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https://bbs.tsingfun.com/thread-2348-1-1.html 

求助各位大佬! - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

...信息获取,如图,已知最终结果能正确获取,但是拍完照一瞬间报错,然后过几秒正确显示识别信息。显示完后一直显示报错警告框,然后app就卡住了{:8_372:}请提供一下报错相关截图,这个报错信息更为关键!同:https://b...
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大模型拓展调用报错,已解决 - 用户反馈 - 清泛IT社区,为创新赋能!

...:"invalid_request _error"}} 解决中。 这个是拓展报错,我后面优化一下。你可以先 调用一下   开始新对话,理论上可以先解决。 但是客户反馈还是不行。跟踪中。 后面发现用户给大模型提问内容为空导...
https://www.tsingfun.com/it/tech/1069.html 

Nginx与Lua - 更多技术 - 清泛网 - 专注C/C++及内核技术

...<VERSION>.tar.gz shell> cd LuaJIT-<VERSION> shell> make shell> make install 因为安装在缺省路径,所以LuaJIT对应lib,include均在/usr/local目录里。 shell> export LUAJIT_LIB=/usr/local/lib shell> export LUAJIT_INC=/usr/local/include/luajit-<VERSION> 下面就可以编译...
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[since C++11] std::array使用 - C/C++ - 清泛网 - 专注C/C++及内核技术

...y<char> as a fix sized c-string. array<char, 100> str = {0}; // all elements initialized with 0. char *p = str.data(); strcpy(p, "hello world"); printf("%s\n", p); // hello world END_TEST; 上面这个例子让我想起了std::string, 它有一个c_str()方法,...
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.tsingfun.com/it/cpp/655.html 

VC窗口刷新InvalidateRect和UpdateWindow - C/C++ - 清泛网 - 专注C/C++及内核技术

...INT messages. If an application processes a WM_PAINT message but does not call BeginPaint or otherwise clear the update region, the application continues to receive WM_PAINT messages as long as the region is not empty. In all cases, an application must clear the update region before returning from t...
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/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

...他许多通用语言(如 Java&trade;、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...
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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...
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...