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django import error - No module named core.management
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If, like me, you are running your django in a virtualenv, and getting this error, look at your manage.py.
The first line should define the python executable used to run the script.
This should be the path to your virtualenv's python, ...
Declaring pointers; asterisk on the left or right of the space between the type and name? [duplicate
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It's a matter of preference, and somewhat of a holy war, just like brace style.
The style
someType* somePtr;
is emphasizing the type of the pointer variable. It is saying, essentially, "the type of somePtr is pointer-to-someType".
The style
someType *som...
Center Align on a Absolutely Positioned Div
... I don't know why I didn't think of that, even though we use the same technique for vertical centering all the time... Thanks anyway, you saved me a lot of time.
– Aayush
Aug 31 '10 at 10:19
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How to kill zombie process
...entry in the process table.) If your daemon is spawning children that become zombies, you have a bug. Your daemon should notice when its children die and wait on them to determine their exit status.
An example of how you might send a signal to every process that is the parent of a zombie (note th...
Scroll back to the top of scrollable div
How to reset the scroll position back to top of container div the next time?
15 Answers
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How Does Modulus Divison Work
...vision is the remainder of an integer division of the given numbers.
That means:
27 / 16 = 1, remainder 11
=> 27 mod 16 = 11
Other examples:
30 / 3 = 10, remainder 0
=> 30 mod 3 = 0
35 / 3 = 11, remainder 2
=> 35 mod 3 = 2
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How can I use jQuery in Greasemonkey scripts in Google Chrome?
As some of you may know, Google Chrome has put some severe limitation on Greasemonkey scripts.
11 Answers
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Get the value of checked checkbox?
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For modern browsers:
var checkedValue = document.querySelector('.messageCheckbox:checked').value;
By using jQuery:
var checkedValue = $('.messageCheckbox:checked').val();
Pure javascript without jQuery:
var checkedValue = null;
var inputElements = document.getEl...
Create a matrix of scatterplots (pairs() equivalent) in ggplot2
...matrix:
library(ggplot2)
data(mtcars)
plotmatrix(mtcars[,1:3])
to me mpg (first column in mtcars) should not be a factor. I haven't checked it, but there's no reason why it should be one. However I get a scatter plot :)
Note: For future reference, the plotmatrix() function has been repla...
WPF: How to programmatically remove focus from a TextBox
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in .NET Framework 4 just Keyboard.ClearFocus();
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