大约有 43,000 项符合查询结果(耗时:0.0186秒) [XML]

https://www.fun123.cn/reference/iot/MQTT.html 

App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网

...户名 可选:用于身份验证的用户名。 UserPasword - 用户密码 可选:用于身份验证的用户密码。 SSL/TLS:服务器身份验证 使用 受信任的证书文件 和 信任库文件 属性设置服务器身份验证(使用 SSL/TLS 协议)。 受...
https://stackoverflow.com/ques... 

LINQ to read XML

...=> new string[]{ l.Attribute("name").Value } .Union( l.Descendants("level2") .Select(l2=>" " + l2.Attribute("name").Value) ) ); foreach (var lv in lvs) { result.AppendLine(lv); ...
https://www.fun123.cn/reference/pro/ai_face.html 

App Inventor 2 人脸识别App开发 - 第三方API接入的通用方法 · App Inventor 2 中文网

...建一个应用以获得API调用时必要的api_key及api_secret。 如何理解api_key及api_secret:可以类比为 API Key是用户ID(用于标识用户),Secret Key是密码(用于鉴权)。“你需要两个不同的密钥,一个告诉他们你是谁,另一个证明你就是...
https://www.tsingfun.com/it/bigdata_ai/1075.html 

记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...使用ext3,可能会遇到这类问题,所以还是大概介绍一下如何解决: MongoDB按需自动生成数据文件:先是<DB>.0,大小是64M,然后是<DB>.1,大小翻番到128M,到了<DB>.5,大小翻番到2G,其后的数据文件就保持在2G大小。为了避免可能出...
https://stackoverflow.com/ques... 

Most Pythonic way to provide global configuration variables in config.py? [closed]

... How about just using the built-in types like this: config = { "mysql": { "user": "root", "pass": "secret", "tables": { "users": "tb_users" } # etc } } You'd access the values as follows: config["mysql"]["tables"]["users"] If ...
https://bbs.tsingfun.com/thread-2935-1-1.html 

【HarmonyOS】编译、测试全流程 - HarmonyOS NEXT - 清泛IT社区,为创新赋能!

...件)和 Profile配置文件(.p7b 文件) 4. 开始编译 四、如何测试 4.1 测试环境对比 测试方式AndroidiOSHarmonyOS NEXT模拟器Android Studio模拟器Xcode模拟器DevEco Studio模拟器CompanionAI2 CompanioniOS Companion暂无(开发中)USB调试ADB需信任...
https://stackoverflow.com/ques... 

When would anyone use a union? Is it a remnant from the C-only days?

I have learned but don't really get unions. Every C or C++ text I go through introduces them (sometimes in passing), but they tend to give very few practical examples of why or where to use them. When would unions be useful in a modern (or even legacy) case? My only two guesses would be programming ...
https://www.fun123.cn/reference/iot/MQTT.html 

App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网

...TCP / SSL / TLS)、客户端ID(ClientID)、用户名(UserName)、密码(UserPassword) 方法:连接(Connect)、断开连接(Disconnect)、订阅(Subscribe)、取消订阅(Unsubscribe)、发布消息(Publish / PublishEx)、发布二进制消息(PublishBytes,...
https://stackoverflow.com/ques... 

Drop all tables whose names begin with a certain string

... MYSQL: SELECT concat('DROP TABLE ',TABLE_NAME,";") as data FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME LIKE '[prefix]%' --- for those who like me found this thread – Andre Nov 6 '12...
https://stackoverflow.com/ques... 

What is the difference between UNION and UNION ALL?

What is the difference between UNION and UNION ALL ? 26 Answers 26 ...