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Difference between a “coroutine” and a “thread”?
...ore machines, that concurrency was simulated with some help from the OS -- nowadays, since so many machines are multi-CPU and/or multi-core, threads will de facto be executing simultaneously, not just "conceptually").
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ADB Android Device Unauthorized
...k if you are agree to connect the computer id.
You need to confirm it.
5. Now Check the device
It is now authorized!
adb devices
<ANDROID_SDK_HOME>\platform-tools>adb devices
List of devices attached
4df798d76f98cf6d device
...
Test for existence of nested JavaScript object key
If I have a reference to an object:
57 Answers
57
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sqlalchemy: how to join several tables by one query?
... I am new to SQLAlchemy. I noticed .filter() can receive multiple criteria if comma separated. Is it preferable to use one .filter() with comma separations inside the parenthesis, or use multiple .filter() like the above answer?
– Intrastellar Explorer
Apr 18 ...
Is “inline” without “static” or “extern” ever useful in C99?
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Yeah, I never understood this myself until just now, so thanks for asking :-). It is weird in that the non-extern "inline" definition goes in the header (but does not necessarily result in any code generation at all), while the "extern inline" declaration goes in the .c f...
MVVM in WPF - How to alert ViewModel of changes in Model… or should I?
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If you want your Models to alert the ViewModels of changes, they should implement INotifyPropertyChanged, and the ViewModels should subscribe to receive PropertyChange notifications.
Your code might look something like this:...
Concatenating two lists - difference between '+=' and extend()
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The only difference on a bytecode level is that the .extend way involves a function call, which is slightly more expensive in Python than the INPLACE_ADD.
It's really nothing you should be worrying about, unless you're performing this...
How to drop column with constraint?
....parent_object_id = OBJECT_ID('tbloffers')
AND c.name = N'checkin'
IF @@ROWCOUNT = 0 BREAK
EXEC (@sql)
END
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Assert a function/method was not called using Mock
...led attribute, but if your assertion fails, the next thing you'll want to know is something about the unexpected call, so you may as well arrange for that information to be displayed from the start. Using unittest, you can check the contents of call_args_list instead:
self.assertItemsEqual(my_var.c...
How does Django's Meta class work?
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You are asking a question about two different things:
Meta inner class in Django models:
This is just a class container with some options (metadata) attached to the model. It defines such things as available permissions, associated database table name, whethe...