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Combining C++ and C - how does #ifdef __cplusplus work?

I'm working on a project that has a lot of legacy C code. We've started writing in C++, with the intent to eventually convert the legacy code, as well. I'm a little confused about how the C and C++ interact. I understand that by wrapping the C code with extern "C" the C++ compiler will no...
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How do you see recent SVN log entries?

Typing svn log spits out an incredibly long, useless list on a command line. I have no idea why that is the default. If I wanted to read (or even could read) 300 entries on the terminal, I wouldn't mind typing svn log --full or something similar. ...
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How to ignore xargs commands if stdin input is empty?

...un-if-empty option: --no-run-if-empty -r If the standard input does not contain any nonblanks, do not run the command. Normally, the command is run once even if there is no input. This option is a GNU extension. ...
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rsync error: failed to set times on “/foo/bar”: Operation not permitted

I'm getting a confusing error from rsync and the initial things I'm finding from web searches (as well as all the usual chmod'ing) are not solving it: ...
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Add Variables to Tuple

I am learning Python and creating a database connection. While trying to add to the DB, I am thinking of creating tuples out of information and then add them to the DB. ...
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Warning: “format not a string literal and no format arguments”

Since upgrading to the latest Xcode 3.2.1 and Snow Leopard, I've been getting the warning 11 Answers ...
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How to check null objects in jQuery

I'm using jQuery and I want to check the existence of an element in my page. I have written following code, but it's not working: ...
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Convert Set to List without creating new List

I am using this code to convert a Set to a List : 15 Answers 15 ...
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How to copy a directory structure but only include certain files (using windows batch files)

... the title says, how can I recursively copy a directory structure but only include some files. E.g given the following directory structure: ...
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What's the difference between session.Merge and session.SaveOrUpdate?

... . Usually, when I need to call SaveOrUpdate , the exception I get on calling Merge has to do with transient objects not being saved first. ...