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Check if OneToOneField is None in Django

... Thank you for this solution. Unfortunately, this doesn't work all the time. In case you want to work with select_related() now or in the future -- or maybe even to be sure you also handle other sorts of magic which may happen elsewhere -- you have to extend the test as follows: if hasat...
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An error occurred while signing: SignTool.exe not found

...s not obvious to anyone, re-running the installer will allow you to add in extra features to your VS install - it's very clear once it's open. – Brondahl Sep 18 '15 at 13:47 a...
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List comprehension vs map

...hen you explicitly mutate them; they are containers. And a bonus: numbers, strings, and tuples are even more predictable since they cannot change at all; they are values. share | improve this answe...
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How to make an immutable object in Python?

... Can you use namedtuple internally inside the class instead of instantiating the object externally? I'm very new to python but the advantage to your other answer is that I can have a class hide the details and also have the power of things like optional p...
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Secure Web Services: REST over HTTPS vs SOAP + WS-Security. Which is better? [closed]

... An extra point - Transmission security requires authentication of transmission initiator. For example, no good having SSH if everyone knows the password. Multi-layer security is vital in distributed applications. Think Identity,...
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What does “Splats” mean in the CoffeeScript tutorial?

...s object in such a way that the splatted argument becomes an array of all "extra" arguments. The most trivial example is (args...) -> In this case, args will simply be an array copy of arguments. Splatted arguments can come either before, after, or between standard arguments: (first, rest...)...
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Is there any way to kill a Thread?

... It is generally a bad pattern to kill a thread abruptly, in Python and in any language. Think of the following cases: the thread is holding a critical resource that must be closed properly the thread has created several other threads ...
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How to set versionName in APK filename using gradle?

...ind, but doesn't work well with flavors with different version codes. They all end up with same version code. – weston May 6 '17 at 15:08 2 ...
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What is a .pid file and what does it contain?

...me times there are certain applications that require additional support of extra plugins and utilities. So it keeps track of these utilities and plugin process running ids using this pid file for reference. That is why whenever you restart an application all necessary plugins and dependant apps mu...
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Calling shell functions with xargs

... You can simplify this by including the argument from xargs in the command string for bash with bash -c 'echo_var "{}"'. So you do not need the _ {} at the end. – phobic Jun 2 '16 at 8:57 ...