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How to properly overload the
I am writing a small matrix library in C++ for matrix operations. However my compiler complains, where before it did not. This code was left on a shelf for 6 months and in between I upgraded my computer from debian etch to lenny (g++ (Debian 4.3.2-1.1) 4.3.2
) however I have the same problem on a Ub...
Where is PATH_MAX defined in Linux?
...ef'd article in part seems to confuse these two, at least in part). Note: POSIX <limits.h> says: A definition of one of the symbolic constants in the following list shall be omitted from the <limits.h> header […] where the corresponding value is equal to or greater than the stated mini...
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No module named MySQLdb
...pip install mysql-python
or if not using a virtual environment (on *nix hosts):
sudo pip install mysql-python
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How to make a copy of a file in android?
...ut.write(buf, 0, len);
}
} finally {
out.close();
}
} finally {
in.close();
}
}
On API 19+ you can use Java Automatic Resource Management:
public static void copy(File src, File dst) throws IOException {
try (InputStream in = new FileInp...
Bash script absolute path with OS X
...ee simple steps are going to solve this and many other OS X issues:
Install Homebrew
brew install coreutils
grealpath .
(3) may be changed to just realpath, see (2) output
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What is the difference between Swing and AWT?
... buttons, labels, text, checkboxes, etc., into that window and responds to all of your mouse-clicks, key entries, etc., deciding for itself what to do instead of letting the operating system handle it. Thus Swing is 100% portable and is the same across platforms (although it is skinnable and has a "...
Environment variables in Mac OS X
...:want
launchctl setenv PATH $PATH
Environment variables are not automatically updated in running applications. You will need to relaunch applications to get the updated environment variables (although you can just set variables in your shell, e.g. PATH=whatever:you:want; there's no need to relaunc...
How can I remove a trailing newline?
...; 'test string\n'.rstrip()
'test string'
Python's rstrip() method strips all kinds of trailing whitespace by default, not just one newline as Perl does with chomp.
>>> 'test string \n \r\n\n\r \n\n'.rstrip()
'test string'
To strip only newlines:
>>> 'test string \n \r\n\n\r \...
When should I use nil and NULL in Objective-C?
...
technically, they are exactly equal, you can send messages to both nil and to NULL. Idiomatically though nil is usually used to represent an object
– cobbal
Oct 14 '09 at 5:43
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How to check if a process id (PID) exists
...process is not owned by the running user, you may not have permissions to call kill -0. Better to use ps -p $PID > /dev/null 2>&1, which allows you to see process status, even if you do not have permissions to send a signal.
– mckoss
Apr 1 '12 at 16:...