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Linq: What is the difference between Select and Where
The Select and Where methods are available in Linq. What should every developer know about these two methods? For example: when to use one over the other, any advantages of using one over the other, etc.
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Cast an instance of a class to a @protocol in Objective-C
I have an object (a UIViewController) which may or may not conform to a protocol I've defined.
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Should I add .vcxproj.filter files to source control?
While evaluating Visual Studio 2010 Beta 2, I see that in the converted directory, my vcproj files became vcxproj files. There are also vcxproj.filter files alongside each project which appear to contain a description of the folder structure (\Source Files, \Header Files, etc.).
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How can I check if the current date/time is past a set date/time?
I'm trying to write a script that will check if the current date/time is past the 05/15/2010 at 4PM
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what is the use of xsi:schemaLocation?
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What does the thread_local mean in C++11?
I am confused with the description of thread_local in C++11. My understanding is, each thread has unique copy of local variables in a function. The global/static variables can be accessed by all the threads (possibly synchronized access using locks). And the thread_local variables are visible to...
How to calculate time in hours between two dates in iOS
How can I calculate the time elapsed in hours between two times (possibly occurring on different days) in iOS?
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SQL Server Profiler - How to filter trace to only display events from one database?
How do I limit a SQL Server Profiler trace to a specific database? I can't see how to filter the trace to not see events for all databases on the instance I connect to.
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How to find current transaction level?
How do you find current database's transaction level on SQL Server?
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Can existing virtualenv be upgraded gracefully?
I have a virtualenv created for Python 2.5 and want to "upgrade" it to Python 2.6.
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