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Execution of Python code with -m option or not
..._ is set to None.
But run a package or module inside a package with -m and now there is at least the possibility of a package, so the __package__ variable is set to a string value; in the above demonstration it is set to 'foo.bar', for plain modules not inside a package it is set to an empty string....
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
...endency madness is one of the reasons that 16-bit instructions are avoided now. x86-64 inherited this from 8086 for 8-bit and 386 for 16-bit, and decided to have 8 and 16-bit registers work the same way in 64-bit mode as they do in 32-bit mode.
See also Why doesn't GCC use partial registers? for...
What is the minimum valid JSON?
...carefully read the JSON description http://json.org/ but I'm not sure I know the answer to the simple question. What strings are the minimum possible valid JSON?
...
When to use static vs instantiated classes
...imic the JavaScript prototype object in PHP 5.3) static members is when I know that the respective field will have the same value cross-instance. At that point you can use a static property and maybe a pair of static getter/setter methods. Anyway, don't forget to add possibility for overriding the s...
PHP_SELF vs PATH_INFO vs SCRIPT_NAME vs REQUEST_URI
...xample.com/index.php/faq/whatever . I need a reliable way for a script to know what it's address is, so it will know what to do with the navigation. I've used mod_rewrite , as per CodeIgniter documentation.
...
What is the difference between active and passive FTP?
...rties.
In passive mode, the client establishes both channels. We already know it establishes the command channel in active mode and it does the same here.
However, it then requests the server (on the command channel) to start listening on a port (at the servers discretion) rather than trying to es...
What are some uses of template template parameters?
...lustrative, is no longer an amazing example due to c++11 introducing auto. Now the same function can be written as:
template <class Cont>
void f(Cont &v) {
auto temp = v.back();
v.pop_back();
// Do some work on temp
std::cout << temp << std::endl;
}
which i...
ReactJS: Modeling Bi-Directional Infinite Scrolling
...ty div at the beginning to fake the previous items that are not rendered.
Now, the interesting part is that once an Element component is rendered, you measure its height and store it in your List. This lets you compute the height of the spacer and know how many elements should be displayed in view....
What's to stop malicious code from spoofing the “Origin” header to exploit CORS?
... cookies. I guess I was confused because in all of the docs I was reading, nowhere did it say explicitly that the Origin header couldn't be overridden. Thanks!
– Jay Lamont
Jan 12 '14 at 0:39
...
Any difference between First Class Function and High Order Function
...pass a function as an argument to another function. The latter function is now "higher order". It is a function that takes a function as an argument.
The canonical example is "map"
map :: (a -> b) -> [a] -> [b]
map f [] = []
map f (x:xs) = f x : map f xs
That is, it takes a function...