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App Inventor 2 扩展 · App Inventor 2 中文网
...ample component
3.2 Convert your sample component to an extension
3.2.2 Test your extension
3.3 Details on creating extensions
3.3.1 When you start to build
3.3.2 Requesting permissions for the extensions you define
3.2.3 Using external libraries
3.2.4 Choosing a package name for your extens...
SignalR - Sending a message to a specific user using (IUserIdProvider) *NEW 2.0.0*
In the latest version of Asp.Net SignalR, was added a new way of sending a message to a specific user, using the interface "IUserIdProvider".
...
Force IE compatibility mode off using tags
... It is recommended that Web developers restrict their use of Edge mode to test pages and other non-production uses because of the possible unexpected results of rendering page content in future versions of Windows Internet Explorer.
I honestly don't entirely understand why. But according to this,...
FB OpenGraph og:image not pulling images (possibly https?)
...://developers.facebook.com/docs/sharing/best-practices/#precaching]
While testing, it took facebook around 10 minutes to finally show the rendered image. So while I was scratching my head and throwing random og tags at facebook (and suspecting the https problem mentioned here), all I had to do was ...
Swift days between two NSDates
... end).day!
}
The naming feels more Swifty, it's one line, and using the latest dateComponents() method.
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Real-world examples of recursion [closed]
... their contacts in the last week, marking each contact on a heap. When you test a person is infected, add them to the "follow up" queue. When a person is a type B, add them to the "follow up" at the head ( because you want to stop this fast ).
After processing a given person, select the person fro...
What's the pythonic way to use getters and setters?
...fer to self._protected_value. Could you please explain how this works? I tested your code and it works as is - so this is not a typo.
– codeforester
Jul 28 '18 at 0:36
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Is using a lot of static methods a bad thing?
...hod mutates global state, or proxies to a global object, or some other non-testable behavior. These are throwbacks to procedural programming and should be refactored if at all possible.
There are a few common uses of "unsafe" statics -- for example, in the Singleton pattern -- but be aware that de...
Python argparse mutual exclusive group
...')
parser_b.add_argument('-c', type=str, action='store', default='', help='test')
Test it
>>> parser.print_help()
usage: PROG [-h] [--foo] {command_1,command_2} ...
positional arguments:
{command_1,command_2}
help for subcommand
command_1 command_...
How do I get the current username in Windows PowerShell?
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Works as expected. Tested for url address reservation.
– Marek Bar
Jul 6 '18 at 8:36
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