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What is the use of static variable in C#? When to use it? Why can't I declare the static variable in
... just declare the int variable. When I run this code the output will be 10 and 10. Its simple.
Now let's look at the static variable here; I am declaring the variable as a static.
Example with static variable:
public class Variable
{
public static int i = 5;
public void test()
{
...
Setting unique Constraint with fluent API?
I'm trying to build an EF Entity with Code First, and an EntityTypeConfiguration using fluent API. creating primary keys is easy but not so with a Unique Constraint. I was seeing old posts that suggested executing native SQL commands for this, but that seem to defeat the purpose. is this possible ...
How to manage startActivityForResult on Android?
...ctivity,so you can set the result as "RESULT_CANCELLED" in the catch block and return to FirstActivty and in FirstActivity's' 'onActivityResult() you can check whether you got the success or failure result.
– Nishant
Oct 31 '13 at 4:42
...
std::auto_ptr to std::unique_ptr
With the new standard coming (and parts already available in some compilers), the new type std::unique_ptr is supposed to be a replacement for std::auto_ptr .
...
What are the best practices for SQLite on Android?
... the best practices when executing queries on an SQLite database within an Android app?
10 Answers
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Why is it Valid to Concatenate Null Strings but not to Call “null.ToString()”?
...compiler treats a null string the same as an empty string, but it does not convert the value of the original null string.
More information on the + binary operator:
The binary + operator performs string concatenation when one or both operands are of type string.
If an operand of string concatenati...
How can I update the current line in a C# Windows Console App?
...pletion, I'd just like to update the value on the same line as the cursor, and not have to put each percentage on a new line.
...
Why use prefixes on member variables in C++ classes
...y specific case, I found the _L happened to be reserved by Visual C++ 2005 and the clash created some unexpected results.
I am on the fence about how useful it is to mark up local variables.
Here is a link about which identifiers are reserved:
What are the rules about using an underscore in a C++ ...
How to show a dialog to confirm that the user wishes to exit an Android Activity?
...
In Android 2.0+ this would look like:
@Override
public void onBackPressed() {
new AlertDialog.Builder(this)
.setIcon(android.R.drawable.ic_dialog_alert)
.setTitle("Closing Activity")
.setMessage("Are...
Creating an R dataframe row-by-row
...me rows, concatenate them using c(), pass them to a matrix row-by-row, and convert that matrix to a dataframe.
For example, rows
dummydata1=c(2002,10,1,12.00,101,426340.0,4411238.0,3598.0,0.92,57.77,4.80,238.29,-9.9)
dummydata2=c(2002,10,2,12.00,101,426340.0,4411238.0,3598.0,-3.02,78.77,-9999.00,-...