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Given an RGB value, how do I create a tint (or shade)?
...nction is roughly equivalent to raising each sRGB color component (ranging from 0 through 1) to a power of 2.2. (Note that "linear RGB" is not an RGB color space.)
See also Violet Giraffe's comment about "gamma correction".
...
When to use “ON UPDATE CASCADE”
...Zed made a good point, that if you use a natural key (e.g. a regular field from your database table) as your primary key, then there might be certain situations where you need to update your primary keys. Another recent example would be the ISBN (International Standard Book Numbers) which changed fr...
What are the uses of the exec command in shell scripts? [closed]
...ernel, there are a family of them based on execve, which is usually called from C.
exec replaces the current program in the current process, without forking a new process. It is not something you would use in every script you write, but it comes in handy on occasion. Here are some scenarios I hav...
How to sort an array of associative arrays by value of a given key in PHP?
... you're looking for is array_multisort().
Here's an example taken straight from the manual and adapted to your case:
$price = array();
foreach ($inventory as $key => $row)
{
$price[$key] = $row['price'];
}
array_multisort($price, SORT_DESC, $inventory);
As of PHP 5.5.0 you can use array_colu...
Why Doesn't C# Allow Static Methods to Implement an Interface?
...ld give Animal a const property, which would still allow it to be accessed from a static context, and return that value in the implementation.
public class Animal: IListItem {
/* Can be tough to come up with a different, yet meaningful name!
* A different casing convention, like Java has, ...
Java - No enclosing instance of type Foo is accessible
...e Hello class.
In your code, you're trying to create an instance of Thing from a static context. That is what the compiler is complaining about.
There are a few possible solutions. Which solution to use depends on what you want to achieve.
Move Thing out of the Hello class.
Change Thing to be a ...
Does height and width not apply to span?
...d image. In this case a div would actually be more appropriate. -1 removed from Isaac's original comment.
– Brian Scott
Mar 22 '10 at 15:15
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Print all day-dates between two dates [duplicate]
...
I came up with this:
from datetime import date, timedelta
sdate = date(2008, 8, 15) # start date
edate = date(2008, 9, 15) # end date
delta = edate - sdate # as timedelta
for i in range(delta.days + 1):
day = sdate + timedelta(da...
Initialize class fields in constructor or at declaration?
...
Really? I swear I grabbed this info from Richter's CLR via C# (2nd edition I think) and the gist of it was that this was syntactic sugar (I may have read it wrong?) and the CLR just jammed the variables into the constructor. But you're stating that this isn't t...
How to secure database passwords in PHP?
...prefer using a database account that is only allowed to acces the database from the web server. And then I don't bother encrypting the configuration, I just store it outside the web root.
– gnud
Apr 25 '09 at 8:01
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