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How efficient is locking an unlocked mutex? What is the cost of a mutex?
... itself manages the scheduling and context switches, this makes sense. But now I have a rough imagination about what the mutex lock/unlock will do internally.
– Albert
Sep 6 '10 at 21:55
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How to connect android emulator to the internet
...etwork connections, find your LAN card, right click it and choose disable. Now try your emulator. If you're like me, it suddenly ... works!
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Check whether a path is valid in Python without creating a file at the path's target
...e).
Syntactic correctness. Root filesystem. That's it.
Question #1: How Now Shall We Do Pathname Validity?
Validating pathnames in Python is surprisingly non-intuitive. I'm in firm agreement with Fake Name here: the official os.path package should provide an out-of-the-box solution for this. For...
Check orientation on Android phone
...g ALWAYS. If you think about a moment, this is exactly what you want - to know if width is smaller than height (portrait), the opposite (landscape) or if they are the same (square).
Then it comes down to this simple code:
public int getScreenOrientation()
{
Display getOrient = getWindowManag...
Removing duplicates from a list of lists
...l names local to each function for speed) to put things on equal footing.
Now we can run checks on the tiny example list:
$ python -mtimeit -s'import nodup' 'nodup.doset(nodup.k)'
100000 loops, best of 3: 11.7 usec per loop
$ python -mtimeit -s'import nodup' 'nodup.dosort(nodup.k)'
100000 loops, b...
browser sessionStorage. share between tabs?
...sionStorage', JSON.stringify(sessionStorage));
// the other tab should now have it, so we're done with it.
localStorage.removeItem('sessionStorage'); // <- could do short timeout as well.
} else if (event.key == 'sessionStorage' && !sessionStorage.length) {
// another tab se...
Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
...sn't involve overflow. The use of strength reduction was okay -- I don't know what the multiplier in the processor would do with (4*100000000) that would be different with (100000000+100000000+100000000+100000000), and falling back on "it's undefined -- who knows" is reasonable. But replacing what...
URL-parameters and logic in Django class-based views (TemplateView)
...or higher, as pointed out here:
Django’s generic class based views now automatically include a view
variable in the context. This variable points at your view object.
In your views.py:
from django.views.generic.base import TemplateView
class Yearly(TemplateView):
template_name ...
Kill child process when parent process is killed
...nifest once again? Apparently there's a break in the clouds, as Windows 8 now allows a process to belong to multiple jobs. [3] So I haven't tested it yet, but I imagine that this madness will be over now if you simply include a manifest with the supportedOS information.
Tip 1: If you're developing...
Are there any standard exit status codes in Linux?
...
Given the way the question now appears, this does not appear to be the most useful (and thus accepted) answer.
– David J.
Dec 9 '13 at 22:49
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