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MQTT接入EasyIoT平台 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...这篇文章基础上进行的另一个平台的测试，先学习这个：https://www.fun123.cn/reference/iot/MQTTGuide.html。
网址：https://iot.dfrobot.com.cn/
自行注册并登录。
新建一个订阅主题。
代码差别主要在：地址、端口不同，且使用用户名...
标签的“具有外边距”有啥用？ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
https://www.fun123.cn/reference/ ... ml#Label.HasMargins
待研究。
Object lp = view.getLayoutParams();
// The following instanceof check will fail if we have not previously
// added the label to the container (Why?)
if (lp instanceof ViewGroup.Margin...
CustomWebView拓展：WebViewer的扩展版本，具有更高的自定义性和灵活性 - A...
...方式
下载离线页面并在没有互联网连接的情况下加载
https://community.appinventor.mi ... -of-web-viewer/9934
https://github.com/vknow360/CustomWebView
My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How do you validate a URL with a regular expression in Python?
...
i inserted this code for https and it works for me, |(?:https://(?:(?:(?:(?:(?:[a-zA-Z\d](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?)\.)*(?:[a-zA-Z](?:(?:[a-zA-Z\d]|-)*[a-zA-Z\d])?))|(?:(?:\d+)(?:\.(?:\d+)){3}))(?::(?:\d+))?)(?:/(?:(?:(?:(?:[a-zA-Z\d$\-.+!*...
How to distinguish mouse “click” and “drag”
...ar();
console.log(flag ? "drag" : "click");
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://unpkg.com/@reactivex/rxjs@5.4.1/dist/global/Rx.js"></script>
This is a direct clone of what @wong2 ...
Is volatile expensive?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Create unique constraint with null columns
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How to mark a build unstable in Jenkins when running shell scripts
... to the master. For example, if the Jenkins slave cannot create an HTTP or HTTPS connection back to the server.
– Steve HHH
Jul 5 '15 at 17:39
3
...
Logical operator in a handlebars.js {{#if}} conditional
...
taking this one up a notch, for those of you who live on the edge.
gist: https://gist.github.com/akhoury/9118682
Demo: Code snippet below
Handlebars Helper: {{#xif EXPRESSION}} {{else}} {{/xif}}
a helper to execute an IF statement with any expression
EXPRESSION is a properly escaped String
Ye...