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John Carmack's Unusual Fast Inverse Square Root (Quake III)
...figure out how and why
this works, and I can't remember the
details anymore.
A slightly better constant, developed by an expert mathematician (Chris Lomont) trying to work out how the original algorithm worked is:
float InvSqrt(float x)
{
float xhalf = 0.5f * x;
int i = *(int*)&x;...
disable all form elements inside div
... user must be able to do it with a parent div name and that's it. If given more information I could have come up with a more efficient solution.
– Andrew Whitaker
Sep 12 '12 at 14:22
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SQL JOIN and different types of JOINs
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How to load JAR files dynamically at Runtime?
... Using this approach you need to make sure you won't call this load method more than once for each class. Since you're creating a new class loader for every load operation, it can not know whether the class was already loaded previously. This can have bad consequences. For example singletons not wor...
What are the differences between concepts and template constraints?
... Cont must be a Sortable type. A neat thing is that it can be written in a more concise form as:
template <Sortable Cont>
void sort(Cont& container);
Now if you attempt to pass anything that is not considered Sortable to this function, you'll get a nice error that immediately tells you ...
RuntimeWarning: invalid value encountered in divide
...ry:
import numpy as np
np.seterr(divide='ignore', invalid='ignore')
For more details see:
http://docs.scipy.org/doc/numpy/reference/generated/numpy.seterr.html
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How do I configure emacs for editing HTML files that contain Javascript?
... multi-web-mode:
https://github.com/fgallina/multi-web-mode
which may be more easily configurable than the already mentioned multi-mode.
You just configure your preferred modes in your .emacs file like this:
(require 'multi-web-mode)
(setq mweb-default-major-mode 'html-mode)
(setq mweb-tags
'...
Remove trailing newline from the elements of a string list
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