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Big-oh vs big-theta [duplicate]
...situations, I often see big-theta with the occasional big-oh thrown in.
I know mathematically what the difference is between the two, but in English, in what situation would using big-oh when you mean big-theta be incorrect, or vice versa (an example algorithm would be appreciated)?
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How to append text to a text file in C++?
...epath, string line)
{
std::ofstream file;
//can't enable exception now because of gcc bug that raises ios_base::failure with useless message
//file.exceptions(file.exceptions() | std::ios::failbit);
file.open(filepath, std::ios::out | std::ios::app);
if (file.fail())
thro...
Disable Visual Studio devenv solution save dialog
... A note to those coming from the msdn link in this answer (that now links to this stackoverflow post) - this answer worked for me without having to do any of the registry editing mentioned - just make this one change and it will fix the problem.
– Adam Knights
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namedtuple and default values for optional keyword arguments
...can also cause problems by breaking isinstance(Node('val'), Node): it will now raise an exception, rather than returning True. While a bit more verbose, @justinfay's answer (below) preserves type hierarchy information properly, so is probably a better approach if others are going to interact with No...
Is it more efficient to copy a vector by reserving and copying, or by creating and swapping? [duplic
...contrast, std::swap(a, b) would exchange their contents (so b's size would now be whatever a's had been before). You are perhaps thinking of a move operation (as occurs in C++11, but not in an ordinary assignment like this). Such a move would leave b in an, ahem, "interesting" state - see stackoverf...
Practical uses for AtomicInteger
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The test are quite old now (more than 6 years) it might me interesting to retest with a recent JRE. I didn't went deep enough in the AtomicInteger to answer but as this is a very specific task it'll use synchronization techniques that are only work...
How to access cookies in AngularJS?
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Use $cookies, $cookieStore is now deprecated
– Niklas Ekman
Jun 24 '15 at 11:24
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show 4 more c...
How to change the blue highlight color of a UITableViewCell?
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Thanks for the great note! This makes it so simple now: you create a new view (no need to even specify the frame: cell.selectedBackgroundView = [UIView new]; and you set whatever colour you want: cell.selectedBackgroundView.backgroundColor = [UIColor colorWithHex:@"ecf2f5" an...
Python + Django page redirect
...date: Django 1.0
There is apparently a better way of doing this in Django now using generic views.
Example -
from django.views.generic.simple import redirect_to
urlpatterns = patterns('',
(r'^one/$', redirect_to, {'url': '/another/'}),
#etc...
)
There is more in the generic views d...
What does a lazy val do?
...ng resources. If we suppose that y has no side effects and that we do not know how often it is accessed (never, once, thousands of times) it is useless to declare it as def since we don't want to execute it several times.
If you want to know how lazy vals are implemented, see this question.
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