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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

... 顶部 var qrcode = new QRCode("qrcode", { text: window.location.href + "?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网  MIT同步更新的中文本...
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Which comment style should I use in batch files?

... is an actual command that just does nothing. In neither case (at least on Windows 7) does the presence of redirection operators cause a problem. However, :: is known to misbehave in blocks under certain circumstances, being parsed not as a label but as some sort of drive letter. I'm a little fuzzy...
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List of All Locales and Their Short Codes?

...les even if you don't know about them when you write your application. My Windows 7 system has 211 locales installed (listed below), so you wouldn't likely write any custom code or translation specific to this many locales. The most important thing for various versions of English is in formatting ...
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Backing beans (@ManagedBean) or CDI Beans (@Named)?

...to CDI so you can just do @Named @ViewScoped, however that appends an ugly windowId request parameter to outcome URLs, also on plain vanilla page-to-page navigation. OmniFaces solves this all with a true CDI @ViewScoped which really ties the bean's scope to JSF view state instead of to an arbitrary ...
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How to use a class from one C# project with another C# project

...by mistake it is even worse. You have to exit the Visual Studio IDE, open windows explorer, go to the workspace directory ...documents\visualstudio xxx\solutionname\packagename select the file or folder, right click and "delete" file or folder. When you re-enter the IDE and select open solution or...
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What is the best way to force yourself to master vi? [closed]

...uld be able to edit files without wanting to hurl your keyboard out of the window. Step 2: use vim everywhere. See this question for tips and links for using vim and vi key bindings at the command line, from your web browser, for composing emails, in your IDE ... You need to use vim to embed the k...
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How are ssl certificates verified?

...t being said, here is a REALLY IMPORTANT part to remember: your device/OS (Windows, Android, etc.) pretty much keeps a list of all major/trusted CA's and their PUBLIC KEYS (if you're thinking that these public keys are used to decrypt the signatures inside the certificates, YOU ARE CORRECT!). Ok, if...
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What does “zend_mm_heap corrupted” mean

... And also it's works on windows: set USE_ZEND_ALLOC=0 – Nabi K.A.Z. May 27 '19 at 5:11 add a comment  |  ...
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The purpose of Model View Projection Matrix

...l go complex. This is because you again have to calculate the positions of window, hood, headlight, wheels etc., in the car with respect to new world. See this video to understand the concepts of model, view and projection. (highly recommended) Then see this to understand how the vertices in the w...
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Importing from builtin library when module with same name exists

...ing the developing version and not the published (and installed) one. In windows 10 i had to write the path to my module like this: file_path=r"C:\Users\My User\My Path\Module File.py". Then i called module_name just like the released module so that i had full working script that, stripped off thi...