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Qt events and signal/slots
...he event loop. Each GUI program needs an event loop, whatever you write it Windows or Linux, using Qt, Win32 or any other GUI library. As well each thread has its own event loop. In Qt "GUI Event Loop" (which is the main loop of all Qt applications) is hidden, but you start it calling:
QApplication...
Difference between modes a, a+, w, w+, and r+ in built-in open function?
...ows:
The argument mode points to a string beginning with one of the following
sequences (Additional characters may follow these sequences.):
``r'' Open text file for reading. The stream is positioned at the
beginning of the file.
``r+'' Open for reading and writing. The stream i...
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...
LINQ equivalent of foreach for IEnumerable
I'd like to do the equivalent of the following in LINQ, but I can't figure out how:
22 Answers
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Best way to serialize an NSData into a hexadeximal string
...:) You are right on the lengthy, I was just trying to hit everywhere I can win microseconds! It divide the loop iterations by 2. But I admit it lacks elegance. Bye
– Moose
Nov 15 '17 at 19:10
...
Why do pthreads’ condition variable functions require a mutex?
...ed before you do a wait.
The wait will "atomically" unlock the mutex, allowing others access to the condition variable (for signalling). Then when the condition variable is signalled or broadcast to, one or more of the threads on the waiting list will be woken up and the mutex will be magically loc...
How to run an EXE file in PowerShell with parameters with spaces and quotes
How do you run the following command in PowerShell?
19 Answers
19
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Performance optimization strategies of last resort [closed]
...t's hard to sample, so I give it 10 times as much work to do, but the following times are based on the original workload.
More diagnosis reveals that it is spending time in queue-management. In-lining these reduces the time to 7 seconds.
Now a big time-taker is the diagnostic printing I had been d...
Redirect all to index.php using htaccess
...tant files or folders ) to index.php , you can use something like the following :
RewriteEngine on
RewriteRule ^((?!index\.php).+)$ /index.php [L]
Note the pattern ^((?!index\.php).+)$ matches any uri except index.php we have excluded the destination path to prevent infinite looping error.
...
Why would you use Oracle database? [closed]
...tools, and finicky optimizer. Whatever savings you get by foregoing an MS Win Server license will immediately be eaten up by lost productivity.
– engil
May 13 '14 at 20:42
4
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