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What's the difference of $host and $http_host in Nginx
...ER (ref).
$http_HEADER
The value of the HTTP request header HEADER when converted to lowercase and with 'dashes' converted to 'underscores', e.g. $http_user_agent, $http_referer...;
Summarizing:
$http_host equals always the HTTP_HOST request header.
$host equals $http_host, lowercase and witho...
#pragma pack effect
...essing variables that are not aligned properly. For example, given 4-byte integers and the following struct:
struct Test
{
char AA;
int BB;
char CC;
};
The compiler could choose to lay the struct out in memory like this:
| 1 | 2 | 3 | 4 |
| AA(1) | pad..................
How do I get the title of the current active window using c#?
...nd-caption-with-windows-api-in-c/
[DllImport("user32.dll")]
static extern IntPtr GetForegroundWindow();
[DllImport("user32.dll")]
static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);
private string GetActiveWindowTitle()
{
const int nChars = 256;
StringBuilder Buff...
Forward declaration of nested types/classes in C++
...
class IDontControl
{
class Nested
{
Nested(int i);
};
};
I needed a forward reference like:
class IDontControl::Nested; // But this doesn't work.
My workaround was:
class IDontControl_Nested; // Forward reference to distinct name.
Later when I could use th...
How to handle back button in activity
... // your code.
}
older than API 5
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
// your code
return true;
}
return super.onKeyDown(keyCode, event);
}
...
How to break out or exit a method in Java?
...em.exit(0);
Java language provides three jump statemnts that allow you to interrupt the normal flow of program.
These include break , continue ,return ,labelled break statement
for e.g
import java.util.Scanner;
class demo
{
public static void main(String args[])
{
outerLo...
Is there a standard sign function (signum, sgn) in C/C++?
...one has posted the type-safe C++ version yet:
template <typename T> int sgn(T val) {
return (T(0) < val) - (val < T(0));
}
Benefits:
Actually implements signum (-1, 0, or 1). Implementations here using copysign only return -1 or 1, which is not signum. Also, some implementations...
Markdown and including multiple files
...signed to allow people to write simple, readable text that could be easily converted to a simple HTML markup. It doesn't really do document layout. For example, there's no real way to align an image to the right or left. As to your question, there's no markdown command to include a single link fr...
How can I multiply and divide using only bit shifting and adding?
...ion)
(_2 means base 2)
As you can see, multiplication can be decomposed into adding and shifting and back again. This is also why multiplication takes longer than bit shifts or adding - it's O(n^2) rather than O(n) in the number of bits. Real computer systems (as opposed to theoretical computer s...
When should null values of Boolean be used?
...false while Boolean allows true , false , and null . I have started to convert my boolean s to Boolean s. This can cause crashes in tests such as
...