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Hex transparency in colors [duplicate]
...ved generically by a cross multiplication.
We have a percentage (ranging from 0 to 100 ) and another number (ranging from 0 to 255) then converted to hexadecimal.
100 <==> 255 (FF in hexadecimal)
0 <==> 0 (00 in hexadecimal)
For 1%
1 * 255 / 100 = 2,5
2,5 in hexa is 2 if you ro...
phantomjs not waiting for “full” page load
... know it as well. Imagine site which has some javascript loading something from server in infinite loop. From the browser point of view - javascript execution is never ending so what is that moment you want phantomjs to tell you that it has finished? This problem is unsolvable in generic case except...
The 'json' native gem requires installed build tools
...alled build tools........."). Any other suggestions? Do you need more info from me?
– sridhar249
Nov 15 '11 at 17:24
...
When should use Readonly and Get only properties
...Fuel = a; // Does not compile
f.FillFuelTank(10); // Value is changed from the method's code
}
Setting the private field of your class as readonly allows you to set the field value only once (using an inline assignment or in the class constructor).
You will not be able to change it later.
pu...
What is the C++ function to raise a number to a power?
...s:
pow(float, float);
pow(float, int);
pow(double, double); // taken over from C
pow(double, int);
pow(long double, long double);
pow(long double, int);
Now you can't just do
pow(2, N)
with N being an int, because it doesn't know which of float, double, or long double version it should take, ...
Compiled vs. Interpreted Languages
...es during overall program execution. It (probably) only gets compiled once from bytecode to machine code. Hence the runtime overhead of JIT is small, and can be ignored for long-running programs. After the JIT compiler has finished doing its job, you will effectively be running pure machine code all...
Namespace + functions versus static methods on a class
...er functions". I found an online reference to this principle in an article from Herb Sutter: http://www.gotw.ca/gotw/084.htm
The important thing to know is that: In C++ functions in the same namespace as a class belong to that class' interface (because ADL will search those functions when resolving...
Open an IO stream from a local file or url
...
Is there a way to return a file object like you did here from an ActionMailer attachment?
– AnApprentice
Dec 6 '10 at 0:03
9
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Read/write files within a Linux kernel module
I know all the discussions about why one should not read/write files from kernel, instead how to use /proc or netlink to do that. I want to read/write anyway. I have also read
Driving Me Nuts - Things You Never Should Do in the Kernel .
...
“Missing compiler required member” error being thrown multiple times with almost no changes to code
...
It actually turned out that I had a bad reference from an assembly that I was no longer using (Azure). I don't think the Azure assembly was compiled against .Net 2.0 but removing it fixed the issue. I'm not sure why this randomly came into being as I haven't touched anything...