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Should the hash code of null always be zero, in .NET
...n.Spring;
Season? vnull = null;
if(vnull == v) // never TRUE
EDIT
From MSDN
If two objects compare as equal, the GetHashCode method for each object must return the same value. However, if two objects do not compare as equal, the GetHashCode methods for the two object do not have to return ...
Can we delete an SMS in Android before it reaches the inbox?
I am deleting an SMS from the inbox but I want to know: How can I delete it before it reaches the inbox?
5 Answers
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Guid is all 0's (zeros)?
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Lessons to learn from this:
1) Guid is a value type, not a reference type.
2) Calling the default constructor new S() on any value type always gives you back the all-zero form of that value type, whatever it is. It is logically the same as...
vs in Generics
...sn't covariant, even though logically it should work, since string derives from object. Before variance in generic interfaces was added to C# and VB.NET (in .NET 4 with VS 2010), this was a compile time error.
After .NET 4, IEnumerable<T> was marked covariant, and became IEnumerable<out T...
Best way of invoking getter by reflection
...ersion (object to string, string to object) to simplify setting properties from user input.
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Deleting a file in VBA
...Object is a really useful tool and well worth getting friendly with. Apart from anything else, for text file writing it can actually sometimes be faster than the legacy alternative, which may surprise a few people. (In my experience at least, YMMV).
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Error in exception handler. - Laravel
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Then make sure directory permissions are 775.
chmod -R 775 app/storage
From the Laravel web site:
Laravel may require one set of permissions to be configured: folders
within app/storage require write access by the web server.
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What's the yield keyword in JavaScript?
...on of the algorithm. Each time you call next(), the generator code resumes from the statement following the yield.
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Detect Click into Iframe using JavaScript
...a click event.
By catching the mousedown you'd prevent the original click from getting to the iframe. If you could determine when the mouse button was about to be pressed you could try to get the invisible div out of the way so that the click would go through... but there is also no event that fire...
Visual Studio 2010 always thinks project is out of date, but nothing has changed
...er) answers for VS2012, VS2013, etc
To find the missing file(s), use info from the article Enable C++ project system logging to enable debug logging in Visual Studio and let it just tell you what's causing the rebuild:
Open the devenv.exe.config file (found in %ProgramFiles%\Microsoft Visual Stud...