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- App应用开发 - 清泛IT社区，为创新赋能！
补充：
Q：我要补充一下说明，虽然程序报这个错，但是APP，还是可以正常接收到数据的，而且这个错只是第一次链接蓝牙的时候，获取数据，会报这个错，后面就不会了。
A：也就是说 uuid 和特征 id 是有效的？
我找到原...
有返回值的过程代码块怎样执行代码块并返值？ - App Inventor 2 中文网 - ...
Q: 请教一下，这两个过程块一个有返回结果，一个没有返回结果。这两没法包含着用而且里面的插槽形状也不一样，我想知道如果定义一个过程函数时需要里面有执行块还有其它块最后返回结果，这个时候该咋办？
有返回结果...
想做一个类似自动精灵这种，能自动化操作手机的 app？ - 用户反馈 - 清泛IT...
Q：也就是想做一个类似自动精灵这种，能自动化操作手机的 app？
A：那的确 appinventor 目前没有这个能力，目前没有自己点屏幕的方案，操作手机层面需要的权限也很大，基本上实现不了的。
How do I execute a bash script in Terminal?
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The advice to cd anywhere at all perpetrates another common beginner misunderstanding. Unless the script internally has dependencies which require it to run in a particular directory (like, needing to read a data file which the script inexplicably doesn'...
How do I edit /etc/sudoers from a script?
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Old thread, but what about:
echo 'foobar ALL=(ALL:ALL) ALL' | sudo EDITOR='tee -a' visudo
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Is there a float input type in HTML5?
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(I'd also set min=0 if it can only be positive)
If you'd prefer to allow any number of decimal places, you can use step="any" (though for currencies, I'd recommend sticking to 0.01). In Chrome & Firefox, the stepper buttons will increment / decrement by 1 when using any. (thanks to Micha...
Diff files present in two different directories
I have two directories with the same list of files. I need to compare all the files present in both the directories using the diff command. Is there a simple command line option to do it, or do I have to write a shell script to get the file listing and then iterate through them?
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HttpClient not supporting PostAsJsonAsync method C#
I am trying to call a web API from my web application. I am using .Net 4.5 and while writing the code I am getting the error HttpClient does not contain a definition PostAsJsonAsync method.
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Propagate all arguments in a bash shell script
I am writing a very simple script that calls another script, and I need to propagate the parameters from my current script to the script I am executing.
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ASP.NET Identity - HttpContext has no extension method for GetOwinContext
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ARGH!
I found it... I didn't have an extra package, called Microsoft.Owin.Host.SystemWeb
Once i searched and installed this, it worked.
Now - i am not sure if i just missed everything, though found NO reference to such a library or package when going through various tutorials...