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difference and when to use getApplication(), getApplicationContext(), getBaseContext() and someClass
...text( ), getBaseContext() , getContext() and someClass.this and especially when to use the these methods in the following code lines:
...
MySQL foreign key constraints, cascade delete
...#2 (blue):
DELETE FROM categories WHERE (id = 2);
the DBMS will look at all the tables which have a foreign key pointing at the 'categories' table, and delete the records where the matching id is 2. Since we only defined the foreign key relationship in products_categories, you end up with this ta...
How to clear a notification in Android
Is it possible to clear a notification programatically?
14 Answers
14
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CSS media queries: max-width OR max-height
...iting. It's been a good chance to learn myself! Take the time to systematically read though and I hope it will be helpful.
Media Queries
Media queries essentially are used in web design to create device- or situation-specific browsing experiences; this is done using the @media declaration within...
List comprehension rebinds names even after scope of comprehension. Is this right?
...list
comprehensions blindingly fast, and
while it was not a common pitfall for
beginners, it definitely stung people
occasionally. For generator
expressions we could not do this.
Generator expressions are implemented
using generators, whose execution
requires a separate execution fra...
Static method in a generic class?
...stance fields. For static fields and static methods, they are shared among all instances of the class, even instances of different type parameters, so obviously they cannot depend on a particular type parameter.
It doesn't seem like your problem should require using the class's type parameter. If y...
What does “atomic” mean in programming?
...eans an operation that appears to be instantaneous from the perspective of all other threads. You don't need to worry about a partly complete operation when the guarantee applies.
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How does inline Javascript (in HTML) work?
I know this is bad practice. Don't write code like this if at all possible.
6 Answers
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How can I change my default database in SQL Server without using MS SQL Server Management Studio?
... Obvious to experienced hands but maybe not so to those doing this occasionally. Square brackets optional, if fields represent contiguous text.
– iokevins
Jan 10 '19 at 19:26
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Execute another jar in a Java program
...
.jar isn't executable. Instantiate classes or make call to any static method.
EDIT:
Add Main-Class entry while creating a JAR.
>p.mf (content of p.mf)
Main-Class: pk.Test
>Test.java
package pk;
public class Test{
public static void main(String []args){
Sys...