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How to convert a Django QuerySet to a list
... i've added one more line to my code sample above, deleting the same entry from exising_question_answers. is it possible to use a ifilter for that too somehow?
– john
Dec 12 '10 at 22:43
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'str' object does not support item assignment in Python
I would like to read some characters from a string and put it into other string (Like we do in C).
7 Answers
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Getting the exception value in Python
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My bad !!! It seems that BaseException.message has been deprecated from 2.6, finally, it definitely seems that there is still not a standardized way to display exception messages. So I guess the best is to do deal with e.args and str(e) depending on your needs (and possibly e.message if the ...
Does const mean thread-safe in C++11?
...rary may result in a data race. In conclusion, const does mean thread-safe from the Standard Library point of view. It is important to note that this is merely a contract and it won't be enforced by the compiler, if you break it you get undefined behavior and you are on your own. Whether const is pr...
Why is lock(this) {…} bad?
...erson.Name = "Nancy Callahan";
Console.WriteLine("Name changed from '{0}' to '{1}'.", oldName, person.Name);
}
else Monitor.Exit(person.Name);
}
}
Console output
'this' person is locked!
Nancy Drew is 16 years old.
'this' person is locked!
Nancy Drew is 17 years ol...
Is Tomcat running?
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To learn what the value of $CATALINA_PID is from your OS-installed Tomcat, try: ps aewwx | grep CATALINA_PID and you will find it in the output for the running process, amongst the other environment variables. In Debian 8 this value is: CATALINA_PID=/var/run/tomcat...
log4net hierarchy and logging levels
... @mrhotroad I'm not sure how different the current version of log4net is from the version in 2014, but here's the doc on LevelMatchFilter.AcceptOnMatch. logging.apache.org/log4net/release/sdk/html/… So you can do <levelToMatch value="WARN" AcceptOnMatch="false" />
– u...
FragmentPagerAdapter getItem is not called
...is may throw a wrench in your gears. Of course, if you are using fragments from the support library v4 you should be okay.
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Java rounding up to an int using Math.ceil
... don't want floor(a/b), but ceil(a/b), and using the definitions and plots from Wikipedia:
With these plots of the floor and ceil function you can see the relationship.
You can see that floor(x) <= ceil(x). We need floor(x + s) = ceil(x). So we need to find s. If we take 1/2 <= s < 1 it ...
Replace whitespaces with tabs in linux
...e beginning with number 0 (e.g. 0 1 2), then the line will be ommitted from the result.
– Nikola Novak
Jun 29 '14 at 18:13
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