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/usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found

... I'm compiling gcc 4.6 from source, and apparently sudo make install didn't catch this one. I dug around and found gcc/trunk/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6.0.15 I copied it in to /usr/lib and redirected libstdc++.so.6 to point to the new one, and now e...
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django test app error - Got an error creating the test database: permission denied to create databas

... you will have the same error. You can fix it for mysql with: => GRANT ALL ON *.* TO django@localhost; I originally tried to only GRANT CREATE... but then could not SELECT or DROP the created database. This essentially makes your user a superuser, so be careful. – mightypi...
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How can I recover the return value of a function passed to multiprocessing.Process?

... need to know which process is returning which value. If that what you actually need to know about the process, or do you need to correlate between your list of inputs and the list of outputs? In that case, I would recommend using multiprocessing.Pool.map to process your list of work items. ...
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How do I get the name of the active user via the command line in OS X?

...if you are ssh'ed into a machine and want to see if a user is logged on locally. If they are not, the command will return "root". – Tim Dearborn Jan 15 '16 at 1:17 add a comme...
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Difference between wait() and sleep()

... A wait can be "woken up" by another thread calling notify on the monitor which is being waited on whereas a sleep cannot. Also a wait (and notify) must happen in a block synchronized on the monitor object whereas sleep does not: Object mon = ...; synchronized (mon) { ...
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What does -fPIC mean when building a shared library?

...es and independence between individual modules, but I'm not sure what it really means. Can you explain? 3 Answers ...
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Nginx缓存解决方案:SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术

...t = "100", keepalive = {idle = 10000, size = 100}, }, {host = "127.0.0.1", port = "11211"}, {host = "127.0.0.1", port = "11212"}, {host = "127.0.0.1", port = "11213"}, } phoenix["rule"] = { default = { expire = 600, min_uses = 0, max_e...
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How do I plot in real-time in a while loop using matplotlib?

...ed, but did not display anything, it remained in a blocked state until I closed it – isti_spl Feb 4 '16 at 8:39 ...
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How to disable typing special characters when pressing option key in Mac OS X? [closed]

...ion-b a red colored key - meaning it's a dead key. Double clicking it will allow you to change it from a dead key to an output key. When prompted for the output you can put in the same thing (by pressing Option-b). Thus it will output the same character but will not be considered a dead key, so In...
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How can I calculate the difference between two dates?

... Not all days have 86400 seconds. For a trivial example that's fine but it's not a good idea in the real world. DST changes, leap seconds, etc can all mess with it. NSCalendar can tell you how many seconds are in a given day. ...