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How do I plot in real-time in a while loop using matplotlib?
...ause(0.05) to both draw the new data and it runs the GUI's event loop (allowing for mouse interaction).
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Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
...e of these reg locations may be OS-dependent. I collected this info from a Windows 10 x64 box. I'm just going to go ahead and dump all of these redist versions and the reg keys I search for to detect installation.:
Visual C++ 2005
Microsoft Visual C++ 2005 Redistributable (x64)
Registry Key: HKL...
How to debug Lock wait timeout exceeded on MySQL?
...ile it waits for something non-MySQL-related to happen."
After re-re-reviewing the show engine innodb status log (once I'd tracked down the client responsible for the lock), I noticed the stuck thread in question was listed at the very bottom of the transaction list, beneath the active queries that...
Multi-gradient shapes
I'd like to create a shape that's like the following image:
5 Answers
5
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Should I use Vagrant or Docker for creating an isolated environment? [closed]
....
The only reason you could want to use Vagrant is if you need to do BSD, Windows or other non-Linux development on your Ubuntu box. Otherwise, go for Docker.
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What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++?
...mulator)
I'll be updating these later:
Borland C++ Builder 6.0 on Windows XP
..04 a char is signed
but 'CHAR_MIN==SCHAR_MIN' is false.
..08 overshifting is okay
but '(1<<bits_per_int)==0' is false.
..09 overshifting is *always* okay
but '(1<<BITS_PER_INT)==0' is false....
Optimise PostgreSQL for fast testing
...s as fsync=off without the giant data corruption risk. You do have a small window of loss of recent data if you enable async commit - but that's it.
If you have the option of slightly altering the DDL, you can also use UNLOGGED tables in Pg 9.1+ to completely avoid WAL logging and gain a real speed...
Image comparison - fast algorithm
...eat for all images in the database, and the match with the smallest result wins. You'd probably want to have a threshold, above which the algorithm concludes that no match was found.
Third Choice - Keypoints + Decision Trees
A third approach that is probably much faster than the other two is us...
Pointers vs. values in parameters and return values
...n find situations where copying even large structs turns out a performance win, but the rule of thumb is not to.
For slices, you don't need to pass a pointer to change elements of the array. io.Reader.Read(p []byte) changes the bytes of p, for instance. It's arguably a special case of "treat littl...
Mutex example / tutorial? [closed]
...le concurrently, we have potential for a race condition. Consider the following code
//somewhere long ago, we have i declared as int
void my_concurrently_called_function()
{
i++;
}
The internals of this function look so simple. It's only one statement. However, a typical pseudo-assembly languag...