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https://bbs.tsingfun.com/thread-1829-1-1.html 

MQTT 之保留消息(Retained Messages) - 创客硬件开发 - 清泛IT社区,为创新赋能!

保留消息定义  如果PUBLISH消息的RETAIN标记位被设置为1,则称该消息为“保留消息”;Broker对保留消息的处理  Broker会存储每个Topic的最后一条保留消息及其Qos,当订阅该Topic的客户端上线后,Broker需要将该消息投递给它。A r...
https://bbs.tsingfun.com/thread-1446-1-1.html 

MIT官方已升级至2.70版本,中文网待测试并升级相关特性 - App Inventor 2 ...

2.70 版本主要更新内容: Features:Add a Japanese translationUpdate the Spanish translationMake the Sharing component respect DefaultFileScope when sharing relative path files (@arjuninv)Add TextChange event, MoveCursor methods, and HintColor property to TextBox and related components (@gordo...
https://bbs.tsingfun.com/thread-805-1-1.html 

c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区,为创新赋能!

Long time reader first time poster! I'm playing around with the boost::multi_index container stuff and have a rather in-depth question that hopefully a boost or C++ container expert might know (my knowledge in C++ containers is pretty basic). For reference, the boost documentation on composite keys ...
https://bbs.tsingfun.com/thread-2263-1-1.html 

用户反馈ble广播数据收不到 - 用户反馈 - 清泛IT社区,为创新赋能!

...?要是可以的话我就先买个离线版的,在线的太慢了 清泛: ble 广播用法不常见,也不太安全,目前就之前一个用户反馈要这个功能,应该是成功过的。这块我还没有实地测试,后续我会用硬件测试一下的 MCU&物联网: 我...
https://bbs.tsingfun.com/thread-818-1-1.html 

NSIS做的安装程序,可接受命令行参数,实现静默安装,静默卸载 - 脚本技术 ...

命令参数 /D=xxx 可以指定安装包的安装路径,覆盖安装包中设置的默认路径及注册表中默认路径。但是,/D= 后面一定不能有引号(不能写成 /D="xxx"),否则不生效,仍然按照安装包中的默认路径安装。 更多请参考英文资...
https://bbs.tsingfun.com/thread-630-1-1.html 

Unicode and UTF-8 - 综合 - 清泛IT论坛,有思想、有深度

Unicode预订的编码空间大小为0x0-0x10FFFF,最多可以容纳1114112(100多万)个字符,实际上并不能使用这么多的空间,于是编码方式出现了两种:ucs-2(BMP)和ucs-4 编码方式,其中,bmp是Basic Multilingual Plane的简写。 一个字符的Unicode编码(...
https://bbs.tsingfun.com/thread-1805-1-1.html 

MIT官方已升级至2.71版本,几乎就是仅增加一个全新主题 - App Inventor 2 ...

2.71 版本主要更新内容:Changes between nb196 and nb197 (July 7, 2024) This is a component release which includes bugfixes and improvements. It includes a new Android MIT AI2 Companion versions 2.71 (from Google Play) and 2.71u (directly downloaded from MIT App Inventor). Features: Ne...
https://bbs.tsingfun.com/thread-419-1-1.html 

微博为什么限制140字(附短信70字限制考) - 闲聊区 - 清泛IT社区,为创新赋能!

问题的提出申请过那么多的微博,数申请网易微博的动机最不纯,因为它的字数限制不是传说中的140字,而是163个字。当年觉得很可爱,于是就注册了,之后再也没登录过。今天在人人网转发状态,提示我超过140字了,突然就好...
https://bbs.tsingfun.com/thread-635-1-1.html 

采花大盗速成秘籍之YQL - 人工智能(AI) - 清泛IT论坛,有思想、有深度

采花大盗速成秘籍之YQL 理想情况下,在一个和谐的网络里,应该允许网站彼此自由的分享数据,不过和谐的网络就好像和谐的社会一样,从未真正存在过,除了少数开放了API的网站,更多的时候,我们只能通过采集来获得数据...
https://bbs.tsingfun.com/thread-408-1-1.html 

MongoDB.Driver.MongoConnectionException: Unable to connect to the prim...

MongoDB.Driver.MongoConnectionException: Unable to connect to the primary member of the replica set: Too many threads are already waiting for a connection.. C# Driver:1.3.1 Replset: localhost:10001 (primary) localhost:10002 (member) I have initReplset and add localhost:10002 to the replse...