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What are the differences between various threading synchronization options in C#?
...re useful when you need interprocess synchronization as they can lock on a string identifier. The same string identifier can be used by different processes to acquire the lock.
Semaphores are like Mutexes on steroids, they allow concurrent access by providing a maximum count of concurrent access'. ...
PostgreSQL create table if not exists
...d to use the exact same spelling. If you don't, you need to use lower-case strings. See:
Are PostgreSQL column names case-sensitive?
pg_tables only contains actual tables. The identifier may still be occupied by related objects. See:
How to check if a table exists in a given schema
If the role e...
Working with Enums in android
...c enum Gender {
MALE("Male", 0),
FEMALE("Female", 1);
private String stringValue;
private int intValue;
private Gender(String toString, int value) {
stringValue = toString;
intValue = value;
}
@Override
public String toString() {
return strin...
Determining type of an object in ruby
...re's no reason to be particular about the type.
For example, object.is_a?(String) is too rigid since another class might implement methods that convert it into a string, or make it behave identically to how String behaves. object.respond_to?(:to_s) would be a better way to test that the object in q...
How do you set the text in an NSTextField?
I'm trying to set the text in an NSTextField, but the -setStringValue: and -setTitleWithMnemonic: methods are not working. Any ideas?
...
Package objects
...ge foo
package object bar {
// package wide constants:
def BarVersionString = "1.0"
// or type aliases
type StringMap[+T] = Map[String,T]
// can be used to emulate a package wide import
// especially useful when wrapping a Java API
type DateTime = org.joda.time.DateTime
type JLi...
How to check if current thread is not main thread
...d SO Java users landing here, don't forget about:
public static void main(String[] args{
Thread.currentThread().setName("SomeNameIChoose");
/*...the rest of main...*/
}
After setting this, elsewhere in your code, you can easily check if you're about to execute on the main thread with:
if...
Does MSTest have an equivalent to NUnit's TestCase?
...esktop, UWP, ...) use the DataRow-attribute!
[TestClass]
public class StringFormatUtilsTest
{
[DataTestMethod]
[DataRow("tttt", "")]
[DataRow("", "")]
[DataRow("t3a4b5", "345")]
[DataRow("3&5*", "35")]
[DataRow("123", "123")]
publi...
Base constructor in C# - Which gets called first? [duplicate]
...lizers. E.g. in the following code:
public class BaseClass {
private string sentenceOne = null; // A
public BaseClass() {
sentenceOne = "The quick brown fox"; // B
}
}
public class SubClass : BaseClass {
private string sentenceTwo = null; // C
public SubClass() {
...
Why does X[Y] join of data.tables not allow a full outer join, or a left join?
...ve, I suggest adding a join keyword to , when i is a datatable: X[Y,j,join=string]. The possible string values for join are suggested to be: 1) "all.y" and "right" -
– Douglas Clark
Oct 31 '12 at 12:46
...