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John Carmack's Unusual Fast Inverse Square Root (Quake III)
...ulates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why this works so much faster than the regular implementation?
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Redirect to named url pattern directly from urls.py in django?
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198
If you are on Django 1.4 or 1.5, you can do this:
from django.core.urlresolvers import revers...
Why are flag enums usually defined with hexadecimal values
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186
Rationales may differ, but an advantage I see is that hexadecimal reminds you: "Okay, we're no...
format statement in a string resource file
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271
You do not need to use formatted="false" in your XML. You just need to use fully qualified stri...
How do I test for an empty string in a Bash case statement?
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127
The case statement uses globs, not regexes, and insists on exact matches.
So the empty string...
Installing Latest version of git in ubuntu
My Current git version 1.7.9.5...
5 Answers
5
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Remove first 4 characters of a string with PHP
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edited Nov 26 '10 at 15:23
answered Nov 26 '10 at 15:16
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How can I add a boolean value to a NSDictionary?
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157
You use NSNumber.
It has init... and number... methods that take booleans, just as it does in...
Referencing another schema in Mongoose
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184
It sounds like the populate method is what your looking for. First make small change to your p...
Convert a float64 to an int in Go
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213
package main
import "fmt"
func main() {
var x float64 = 5.7
var y int = int(x)
fmt.Printl...