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Dealing with “java.lang.OutOfMemoryError: PermGen space” error

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How to use the PI constant in C++

I want to use the PI constant and trigonometric functions in some C++ program. I get the trigonometric functions with include <math.h> . However, there doesn't seem to be a definition for PI in this header file. ...
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Create a .csv file with values from a Python list

... from a Python list. When I print the values in the list they are all unicode (?), i.e. they look something like this 13 A...
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Run cron job only if it isn't already running

So I'm trying to set up a cron job as a sort of watchdog for a daemon that I've created. If the daemon errors out and fails, I want the cron job to periodically restart it... I'm not sure how possible this is, but I read through a couple of cron tutorials and couldn't find anything that would do wha...
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How do I enable the column selection mode in Eclipse?

...wrote that Eclipse 3.5 finally supports column selection. Unfortunately I don't know HOW to enable it. I tried pressing the ALT-key like I am used to in Visual Studio and all other Microsoft products but that had no effect. ...
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How do I clone into a non-empty directory?

I have directory A with files matching directory B. Directory A may have other needed files. Directory B is a git repo. 15 ...
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Where does PHP store the error log? (php5, apache, fastcgi, cpanel)

I am on shared hosting and have Cpanel, Apache, PHP is run by fastcgi. Where does PHP store the error log? 21 Answers ...
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How to disable back swipe gesture in UINavigationController on iOS 7

In iOS 7 Apple added a new default navigation behavior. You can swipe from the left edge of the screen to go back on the navigation stack. But in my app, this behavior conflicts with my custom left menu. So, is it possible to disable this new gesture in UINavigationController? ...
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lexers vs parsers

Are lexers and parsers really that different in theory? 5 Answers 5 ...
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How do I update Ruby Gems from behind a Proxy (ISA-NTLM)

The firewall I'm behind is running Microsoft ISA server in NTLM-only mode. Hash anyone have success getting their Ruby gems to install/update via Ruby SSPI gem or other method? ...