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What does the @ symbol before a variable name mean in C#? [duplicate]
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The @ symbol allows you to use reserved word. For example:
int @class = 15;
The above works, when the below wouldn't:
int class = 15;
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How to get the ActionBar height?
...getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true))
{
Int actionBarHeight = TypedValue.complexToDimensionPixelSize(tv.data,getResources().getDisplayMetrics());
}
Kotlin:
val tv = TypedValue()
if (requireActivity().theme.resolveAttribute(android.R.attr.actionBarSize, tv, true)...
how to schedule a job for sql query to run daily?
...abaseName = 'Databasename' SET @pathName = 'C:\DBBackup\DBData\DBBackUp' + Convert(varchar(8), GETDATE(), 112) + '_' + Replace((Convert(varchar(8), GETDATE(), 108)),':','-')+ '.bak' BACKUP DATABASE @databaseName TO DISK = @pathName WITH NOFORMAT,
INIT,
NAME = N'',
SKIP,
NOREWIND,
NOUNLOAD,
STA...
When tracing out variables in the console, How to create a new line?
...separate console.log() for each var, and separate with a comma rather than converting them all to strings? That would give you separate lines, AND give you the true value of each variable rather than the string representation of each (assuming they may not all be strings).
console.log('roleName',ro...
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...
#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..................
Forward declaration of nested types/classes in C++
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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);
}
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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...