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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...
Whether a variable is undefined [duplicate]
...
function my_url (base, opt)
{
var retval = ["" + base];
retval.push( opt.page_name ? "&page_name=" + opt.page_name : "");
retval.push( opt.table_name ? "&table_name=" + opt.table_name : "");
retval.push( opt.optionResu...
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...
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...
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...
What's the difference between @Secured and @PreAuthorize in spring security 3?
...@Secured.
So I say it is better to use @PreAuthorize as it is "expression-based" and you can use expressions like hasRole, hasAnyRole, permitAll, etc.
To learn about expressions, see these example expressions.
share
...
Best practice to return errors in ASP.NET Web API
...on (HttpStatusCode statusCode, string message, Exception ex)
: base(message, ex)
{
this.statusCode = statusCode;
}
public ApiException (HttpStatusCode statusCode, string message)
: base(message)
{
this.statusCode = stat...