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Django filter versus get for single object?
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get() is provided specifically for this case. Use it.
Option 2 is almost precisely how the get() method is actually implemented in Django, so there should be no "performance" difference (and the fact that you're thinking about it indicates you're vio...
Mechanisms for tracking DB schema changes [closed]
...ed code to a production server) but we're still doing database updates manually. I would like to find or create a solution that allows us to work efficiently across servers with different environments while continuing to use Subversion as a backend through which code and DB updates are pushed aroun...
Avoiding SQL injection without parameters
...curity code for a living, much better tested than what you can manage, and serviced by the vendor if a vulnerability is found.
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Sharing link on WhatsApp from mobile website (not application) for Android
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@ad08: That is how Threema and the other 40 services I tested worked. Viber and WhatsApp, however, do nothing, I contacted their developers, and they both admitted the API does nothing. I've kept track of their correspondence and the other 40 api's (which work) here:...
Unique constraint that allows empty values in MySQL
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How to declare an array in Python?
... should never refer to anything other than a list", since Python is dynamically typed.
*The default built-in Python type is called a list, not an array. It is an ordered container of arbitrary length that can hold a heterogenous collection of objects (their types do not matter and can be freely m...
When to use IList and when to use List
... I very strongly disagree about Point #2, especially if this is at a service/api boundary. Returning modifiable collections can give the impression that the collections are "live" and calling methods like Add() and Remove() may have effects beyond just the collection. Returning a read-only i...
The breakpoint will not currently be hit. No symbols have been loaded for this document in a Silverl
...ration, check the physical location for the virtual folder containing your services, and make sure it matches the output directory from VStudio.
– Bevan
Jan 25 '12 at 18:30
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Is there a way to suppress warnings in Xcode?
...his overrides any warning flags on the command line. It doesn't work with all warnings though. Add -fdiagnostics-show-option to your CFLAGS and you can see which flag you can use to disable that warning.
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How can I clear event subscriptions in C#?
...ist, effectively.
From outside the class, you can't do this - events basically expose "subscribe" and "unsubscribe" and that's it.
It's worth being aware of what field-like events are actually doing - they're creating a variable and an event at the same time. Within the class, you end up referenci...