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For each row in an R dataframe

I have a dataframe, and for each row in that dataframe I have to do some complicated lookups and append some data to a file. ...
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Get the client IP address using PHP [duplicate]

I want to get the client IP address who uses my website. I am using the PHP $_SERVER superglobal: 5 Answers ...
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C++ static virtual members?

Is it possible in C++ to have a member function that is both static and virtual ? Apparently, there isn't a straightforward way to do it ( static virtual member(); is a compile error), but is there at least a way to achieve the same effect? ...
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How to declare an array in Python?

How do I declare an array in Python ? 16 Answers 16 ...
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How to check if a string “StartsWith” another string?

How would I write the equivalent of C#'s String.StartsWith in JavaScript? 19 Answers ...
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LaTeX source code listing like in professional books

How should a latex source code listing look like to produce an output like in known books, for example one for the Spring Framework? I've tried with the latex listings package but wasn't able to produce something that looked as nice as the one below. So I'm primarely interested in the formatting ins...
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Using msbuild to execute a File System Publish Profile

I have a c# .Net 4.0 project created with VS2010 and now being accessed with VS2012. 7 Answers ...
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Are tuples more efficient than lists in Python?

Is there any performance difference between tuples and lists when it comes to instantiation and retrieval of elements? 8 A...
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How to add an extra column to a NumPy array

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How to kill all processes with a given partial name? [closed]

I want to kill all processes that I get by: 14 Answers 14 ...