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How can I use interface as a C# generic type constraint?
...e T : IBase;
public interface IBase { }
public interface IActual : IBase { string S { get; } }
public class Actual : IActual { public string S { get; set; } }
Now there's nothing stopping you from calling Foo thus:
Foo<Actual>();
The Actual class, after all, satisfies the IBase constraint...
super() in Java
...intln(a);
System.out.println(a);
}
public static void main(String[] args)
{
new Sup1().Show();
}
}
Output:
200
200
Now check out program 2 and try to figure out the main difference.
Program 2
class Base
{
int a = 100;
}
class Sup2 extends Base
{
i...
How do I move a single folder from one Subversion repository to another repository?
...n SVN load checksum error.
So when you perform this operation, don’t do string substitutions with sed of only the path name.
Substitute “Node-path: old_path” with “Node-path: new_path”. See SVN book chapter 5 “repository administration” for more details.
...
How to get a list of current open windows/process with Java?
...pproach to parse the the process list from the command "ps -e":
try {
String line;
Process p = Runtime.getRuntime().exec("ps -e");
BufferedReader input =
new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((line = input.readLine()) != null) {
Sy...
How to properly match varargs in Mockito
...introduced anyVararg() matcher:
when(a.b(anyInt(), anyInt(), Matchers.<String>anyVararg())).thenReturn(b);
Also see history for this: https://code.google.com/archive/p/mockito/issues/62
Edit new syntax after deprecation:
when(a.b(anyInt(), anyInt(), ArgumentMatchers.<String>any()))....
How do I format a date with Dart?
I have an instance of DateTime and I would like to format that to a String. How do I do that? I want to turn the date into a string, something like "2013-04-20".
...
Detect if device is iOS
...
Detecting iOS
With iOS 13 iPad both User agent and platform strings are changed and differentiating between iPad and MacOS seems possible, so all answers below needs to take that into account now.
This might be the shortest alternative that also covers iOS 13:
function iOS() {
retur...
How to convert java.sql.timestamp to LocalDate (java8) java.time?
...before any timestamp -> java.time conversion:
public static void main(String... args) {
TimeZone utcTimeZone = TimeZone.getTimeZone("UTC");
TimeZone.setDefault(utcTimeZone);
...
timestamp.toLocalDateTime().toLocalDate();
}
Or you can use toInstant.atZone chain:
timestamp.toIn...
Delete duplicate records in SQL Server?
...
You can do this with window functions. It will order the dupes by empId, and delete all but the first one.
delete x from (
select *, rn=row_number() over (partition by EmployeeName order by empId)
from Employee
) x
where rn > 1;
Run it as a select to see what would be deleted:
select *...
SQL DROP TABLE foreign key constraint
...ferencing your table, you could use this SQL (if you're on SQL Server 2005 and up):
SELECT *
FROM sys.foreign_keys
WHERE referenced_object_id = object_id('Student')
and if there are any, with this statement here, you could create SQL statements to actually drop those FK relations:
SELECT
'...