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Null or default comparison of generic argument in C#
...ify its own custom overload. The compiler determines which overload to use based on the static type of the variable (the determination is not polymorphic). Therefore, if you change your example to constrain the generic type parameter T to a non-sealed reference type (such as Exception), the compiler...
When to use IList and when to use List
...
It's always best to use the lowest base type possible. This gives the implementer of your interface, or consumer of your method, the opportunity to use whatever they like behind the scenes.
For collections you should aim to use IEnumerable where possible. Thi...
PHP Multidimensional Array Searching (Find key by specific value)
...
Another poossible solution is based on the array_search() function. You need to use PHP 5.5.0 or higher.
Example
$userdb=Array
(
(0) => Array
(
(uid) => '100',
(name) => 'Sandra Shush',
(url) => 'urlof100'
),...
How to POST raw whole JSON in the body of a Retrofit request?
...s:2.3.0'
Your Interface
public interface ApiInterface {
String URL_BASE = "http://10.157.102.22/rest/";
@Headers("Content-Type: application/json")
@POST("login")
Call<User> getUser(@Body String body);
}
Activity
public class SampleActivity extends AppCompatActivity ...
What is the fastest way to compare two sets in Java?
...h sorted in the same order
The following code assumes that both sets are based on the records comparable. A similar method could be based on on a Comparator.
public class SortedSetComparitor <Foo extends Comparable<Foo>>
implements Comparator<SortedSet<Foo>&...
@Transactional(propagation=Propagation.REQUIRED)
...pagation.REQUIRED)
public void doSomething() {
// access a database using a DAO
}
}
When doSomething() is called it knows it has to start a Transaction on the database before executing. If the caller of this method has already started a Transaction then this method will use that sa...
Database sharding vs partitioning
...ly. In that context, two words that keep on showing up with regards to databases are sharding and partitioning . I looked up descriptions but still ended up confused.
...
C#: Looping through lines of multiline string
... for StringReader
string textReaderText = "TextReader is the abstract base " +
"class of StreamReader and StringReader, which read " +
"characters from streams and strings, respectively.\n\n" +
"Create an instance of TextReader to open a text file " +
"for readi...
How is Docker different from a virtual machine?
...sting; let's say you have thousands of tests that need to connect to a database, and each test needs a pristine copy of the database and will make changes to the data. The classic approach to this is to reset the database after every test either with custom code or with tools like Flyway - this can ...
Persistent :set syntax for a given filetype?
...
Add one of the following passages to your .vimrc:
" Set the filetype based on the file's extension, overriding any
" 'filetype' that has already been set
au BufRead,BufNewFile *.html.twig set filetype=html
or
" Set the filetype based on the file's extension, but only if
" 'filetype' has not...