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Why does one often see “null != variable” instead of “variable != null” in C#?
In c#, is there any difference in the excecution speed for the order in which you state the condition?
9 Answers
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How to Reverse Fragment Animations on BackStack?
...o your question and answer, but could you maybe link me to something that explains customAnimations a little bit? :P
– AreusAstarte
Apr 13 '13 at 11:29
2
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Asking the user for input until they give a valid response
...ak out of the loop when you're satisfied.
When Your Input Might Raise an Exception
Use try and except to detect when the user enters data that can't be parsed.
while True:
try:
# Note: Python 2.x users should use raw_input, the equivalent of 3.x's input
age = int(input("Please...
Remove everything after a certain character
...s = '/Controller/Action?id=11112&value=4444';
s = s.substring(0, s.indexOf('?'));
document.write(s);
Sample here
I should also mention that native string functions are much faster than regular expressions, which should only really be used when necessary (this isn't one of those cases).
Updat...
How to get one value at a time from a generator function in Python?
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Yes, or next(gen) in 2.6+.
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Why do we check up to the square root of a prime number to determine if it is prime?
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Since it doesn't hurt (except for sometimes an additional division) to check one more divisor, you can just calculate ceil(sqrt(n)).
– gnasher729
Aug 3 at 9:28
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CSS hide scroll bar if not needed
...s will be displayed and I want to hide the scroll bar if content does not exceed the current width.
5 Answers
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No module named MySQLdb
...s on what OS and software you have and use.
easy_install mysql-python (mix os)
pip install mysql-python (mix os/ python 2)
pip install mysqlclient (mix os/ python 3)
apt-get install python-mysqldb (Linux Ubuntu, ...)
cd /usr/ports/databases/py-MySQLdb && make install clean (FreeBSD)
yum in...
Abstract class in Java
...ws the subclass to be interchanged with all other subclasses.
Here's an example:
abstract public class AbstractClass
{
abstract public void abstractMethod();
public void implementedMethod() { System.out.print("implementedMethod()"); }
final public void finalMethod() { System.out.print...
Exporting a function in shell
Please tell me how to export a function in parent shell (bash, sh or ksh) so that the function will be available to all the child process launced from the parent process?
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