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Why does Razor _layout.cshtml have a leading underscore in file name?

...ith the underscore. And the Web Pages framework has been configured not to allow files with leading underscores in their names from being requested directly. Other .cshtml files within Web Pages generally need to be browsable. They are the equivalent of .asp or .php files. The ASP.NET team have sta...
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Why is “if not someobj:” better than “if someobj == None:” in Python?

...a __nonzero__ special method (as do numeric built-ins, int and float), it calls this method. It must either return a bool value which is then directly used, or an int value that is considered False if equal to zero. Otherwise, if the object has a __len__ special method (as do container built-ins, li...
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Mock vs MagicMock

My understanding is that MagicMock is a superset of Mock that automatically does "magic methods" thus seamlessly providing support for lists, iterations and so on... Then what is the reason for plain Mock existing? Isn't that just a stripped down version of MagicMock that can be practically ...
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When would anyone use a union? Is it a remnant from the C-only days?

I have learned but don't really get unions. Every C or C++ text I go through introduces them (sometimes in passing), but they tend to give very few practical examples of why or where to use them. When would unions be useful in a modern (or even legacy) case? My only two guesses would be programming ...
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How can I use PowerShell with the Visual Studio Command Prompt?

... Stealing liberally from here: http://allen-mack.blogspot.com/2008/03/replace-visual-studio-command-prompt.html, I was able to get this to work. I added the following to my profile.ps1 and all is well with the world. pushd 'c:\Program Fil...
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What's the difference between dynamic (C# 4) and var?

...iteLine(s.Length); and string s = "abc"; Console.WriteLine(s.Length); All that happened was that the compiler figured out that s must be a string (from the initializer). In both cases, it knows (in the IL) that s.Length means the (instance) string.Length property. dynamic is a very different b...
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Django select only rows with duplicate field values

... syntax is also how Django interprets you wanting to do a join. So, essentially when you try to filter on that, Django thinks you're trying to do a join with count which obviously doesn't exist. The fix is to specify a name for your annotation result, i.e. annotate(mycount=Count('id')) and then filt...
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NuGet for solutions with multiple projects

...ager > Manage NuGet Packages for Solution... And if you go to the Installed packages area you can 'Manage' a single package across every project in the solution. share | improve this answer ...
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What is the difference between C# and .NET?

.... The C# specification says only a very little about the environment (basically, that it should contain some types such as int, but that's more or less all). share | improve this answer | ...
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How to get everything after a certain character?

...te fast. $s = '233718_This_is_a_string'; $firstPart = strtok( $s, '_' ); $allTheRest = strtok( '' ); Empty string like this will force the rest of the string to be returned. NB if there was nothing at all after the '_' you would get a FALSE value for $allTheRest which, as stated in the document...