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Django auto_now and auto_now_add
... change between every release. (Which I believe is the impetus behind the call to have them removed altogether).
The fact that they only work on DateField, DateTimeField, and TimeField, and by using this technique you are able to automatically populate any field type every time an item is saved.
Use...
Difference between single and double square brackets in Bash
...nt of [ that prevents further arguments from being used.
Ubuntu 16.04 actually has an executable for it at /usr/bin/[ provided by coreutils, but the bash built-in version takes precedence.
Nothing is altered in the way that Bash parses the command.
In particular, < is redirection, && a...
Storing WPF Image Resources
For a WPF application which will need 10 - 20 small icons and images for illustrative purposes, does storing these in the assembly as embedded resources the right way to go?
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Why use a prime number in hashCode?
...ly be determined by the least significant entry (the one not multiplied at all). Similar entries will collide. Not good for a hash function.
31 is a large enough prime that the number of buckets is unlikely to be divisible by it (and in fact, modern java HashMap implementations keep the number of b...
Running two projects at once in Visual Studio
...n the project, then Debug-> Start new Instance. So with one instance of VS one can debug loads of instances at once.
– Max
Oct 8 '10 at 10:13
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Are inline virtual functions really a non-sense?
... excerpt from the excellent C++ faq:
"The only time an inline virtual call
can be inlined is when the compiler
knows the "exact class" of the object
which is the target of the virtual
function call. This can happen only
when the compiler has an actual object
rather than a pointer or ...
Named string formatting in C#
...ed in at {LastLoginDate}".FormatWith(user);
A third improved method partially based on the two above, from Phil Haack
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How can I get the current language in Django?
...t: Returns None if translations are temporarily deactivated (by deactivate_all() or when None is passed to override()). Before Django 1.8, get_language() always returned LANGUAGE_CODE when translations were deactivated.
– Pieter
Jan 3 '17 at 13:11
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What is console.log?
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Places you can view the console! Just to have them all in one answer.
Firefox
http://getfirebug.com/
(you can also now use Firefox's built in developer tools Ctrl+Shift+J (Tools > Web Developer > Error Console), but Firebug is much better; use Firebug)
Safari and Ch...
Why should I use Hamcrest-Matcher and assertThat() instead of traditional assertXXX()-Methods
...ed) state four advantages :
More readable and typeable: this syntax allows you to think in terms of subject, verb, object (assert "x is 3") rather than assertEquals, which uses verb, object, subject (assert "equals 3 x")
Combinations: any matcher statement s can be negated (not(s)), combine...