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How efficient is locking an unlocked mutex? What is the cost of a mutex?
In a low level language (C, C++ or whatever): I have the choice in between either having a bunch of mutexes (like what pthread gives me or whatever the native system library provides) or a single one for an object.
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Equivalent of “throw” in R
How does one "throw" an error in R? I have a function that takes a data frame and some column names and does stuff with them. If the columns don't exist, I want the function to stop and to stop all functions depending on it.
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Pagination on a list using ng-repeat
I'm trying to add pages to my list. I followed the AngularJS tutorial, the one about smartphones and I'm trying to display only certain number of objects. Here is my html file:
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Text overwrite in visual studio 2010
Really silly problem here.
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Makefile, header dependencies
Let's say I have a makefile with the rule
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How do I get the time difference between two DateTime objects using C#?
How do I get the time difference between two DateTime objects using C#?
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IntelliJ does not show 'Class' when we right click and select 'New'
We're creating a new project in IntelliJ and must have something wrong because when we right click on a directory, select New and then get the context menu, Java based options are not shown. Currently get things like File, some HTML options, XML options.
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Resizing an iframe based on content
I am working on an iGoogle-like application. Content from other applications (on other domains) is shown using iframes.
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When would I need a SecureString in .NET?
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11 Answers
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How do I find a “gap” in running counter with SQL?
I'd like to find the first "gap" in a counter column in an SQL table. For example, if there are values 1,2,4 and 5 I'd like to find out 3.
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