大约有 40,000 项符合查询结果(耗时:0.0417秒) [XML]

https://bbs.tsingfun.com/thread-1622-1-1.html 

MQTT相关知识研究笔记 - 创客硬件开发 - 清泛IT社区,为创新赋能!

...具,用于以新颖有趣的方式将硬件设备、API 和在线服务连接在一起。 Node-RED 是一个流程化的工具,不是MQTT网关,它能整合各种资源包括MQTT网关、微信推送、天气推送等服务节点,定义执行流程将各个硬件节点以一定的逻辑联...
https://bbs.tsingfun.com/thread-1625-1-1.html 

阿里云物联网平台开通及基础用法 - 创客硬件开发 - 清泛IT社区,为创新赋能!

首先是连接阿里云服务器。如何创建产品、设备和topic 重点:${deviceName}在不同的设备中会被替换成对应的名字,例如你在该产品下创建了个 D001 设备,那么该设备的topic就是: /你自己的Product/D001/user/test 在...
https://www.tsingfun.com/it/ai... 

App Inventor 2 如何下载/保存网络图片? - App Inventor 2 中文网 - 清泛...

...行数据交互的场景就要考虑使用它,Web客户端组件在通信连接抽屉中:设置好网络图片的url,然后执行Get方法即可,代码如下:其中,特 首先,需要使用 Web客户端 组件,需要和网络url进行数据交互的场景就要考虑使用它,We...
https://bbs.tsingfun.com/thread-1741-1-1.html 

Android商业模拟器如何使用? - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

...选择安装apk,完成AI伴侣App的安装并启动它。开始测试:连接 –> AI伴侣,复制 6 位字符码,粘贴到模拟器中的AI伴侣中,点“使用编码连接”即可。
https://bbs.tsingfun.com/thread-2550-1-1.html 

mqtt协议一般最大支持订阅几个主题? - 创客硬件开发 - 清泛IT社区,为创新赋能!

...服务提供商也有自己的限制。例如,AWS IoT Core 对单个MQTT连接的订阅数限制是 50个。这是一个非常具体的硬性限制,超过后会收到错误。 结论一:你首先需要查阅你所使用的Broker的文档,来确认其默认行为和最大可配置值。2. MQ...
https://bbs.tsingfun.com/thread-2725-1-1.html 

AppInventor2项目是自动保存的吗? - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

... Q:每次修改组件/代码块之后,AI伴侣如何及时更新? 连接菜单 -> 刷新AI伴侣屏幕: 界面有更新会自动刷新;代码块有更新需要点上面菜单手动刷新后立马生效。 千万不要傻乎乎的每次断开连接,再重连哦~
https://stackoverflow.com/ques... 

Why it's not possible to use regex to parse HTML/XML: a formal explanation in layman's terms

...omaton has no memory - no stack, no heap, no infinite tape to scribble on. All it has is a finite number of internal states, each of which can read a unit of input from the string being tested, and use that to decide which state to move to next. As special cases, it has two termination states: "yes,...
https://stackoverflow.com/ques... 

Iterating over Java collections in Scala

... As of Scala 2.8, all you have to do is to import the JavaConversions object, which already declares the appropriate conversions. import scala.collection.JavaConversions._ This won't work in previous versions though. ...
https://stackoverflow.com/ques... 

Undefined symbols for architecture arm64

I am getting a Apple Mach-O Linker Error everytime I import a file from CocoaPods. 41 Answers ...
https://stackoverflow.com/ques... 

Automatically remove Subversion unversioned files

Does anybody know a way to recursively remove all files in a working copy that are not under version control? (I need this to get more reliable results in my automatic build VMware.) ...