Questions tagged [method-invocation]
135 questions
73
votes
9 answers
How to execute a method passed as parameter to function
I want to write my own function in JavaScript which takes a callback method as a parameter and executes it after the completion, I don't know how to invoke a method in my method which is passed as an argument. Like Reflection.
example code
function…
Muhammad Ummar
- 3,541
- 6
- 40
- 71
39
votes
5 answers
What is the difference between message-passing and method-invocation?
Is there a difference between message-passing and method-invocation, or can they be considered equivalent? This is probably specific to the language; many languages don't support message-passing (though all the ones I can think of support methods)…
Scrollbar
- 791
- 2
- 7
- 6
36
votes
7 answers
How to suspend a java thread for a small period of time, like 100 nanoseconds?
I know Thread.sleep() can make a java thread suspend for a while, like certain milliseconds and certain nanoseconds. But the problem is the invocation of this function also causes overhead.
For example, if I want a thread to suspend for 100…
JackWM
- 10,085
- 22
- 65
- 92
20
votes
1 answer
Understanding the Dispatcher Queue
I think I need some help understanding the Dispatcher Queue.
When new work arrives it gets added at the beginning of the dispatcher queue and when the Dispatcher wants to process a working item it gets removed from the beginning.
In more general…
marc wellman
- 5,808
- 5
- 32
- 59
16
votes
3 answers
MethodInvoke delegate or lambda expression
What is the difference between the two?
Invoke((MethodInvoker) delegate {
checkedListBox1.Items.RemoveAt(i);
checkedListBox1.Items.Insert(i, temp + validity);
checkedListBox1.Update();
}
);
vs
Invoke((MethodInvoker)
…
Jack
- 5,680
- 10
- 49
- 74
16
votes
3 answers
Invoke method with an array parameter using reflection
I am attempting to write a method the executes a static method from another class by passing an array of strings as arguments to the method.
Here's what I have:
public static void
executeStaticCommand(final String[] command, Class provider)
{
…
azz
- 5,852
- 3
- 30
- 58
12
votes
1 answer
Hit a bean method and redirect on a GET request
I'm using JSF 2 and PrimeFaces 2.1 on GlassFish.
I have a page that is intended to allow people to perform an action after following a callback URL (e.g. as link embedded in email or as callback URL parameter of some external authentication or…
user550738
9
votes
2 answers
Ambiguous invocation caused by picking up two versions of System.Linq
I have the following code, which shows a squiggly red line under the lambda expression after .Any( because of an "ambiguous invocation" between System.Linq versions 3.5 and 4.0 - how do I force it to use a particular version?
It compiles and runs…
greg84
- 7,541
- 3
- 36
- 45
9
votes
2 answers
perl constructor keyword 'new'
I am new to Perl and currently learning Perl object oriented and came across writing a constructor.
It looks like when using new for the name of the subroutine the first parameter will be the package name.
Must the constructor be using the keyword…
user2763829
- 793
- 3
- 10
- 20
8
votes
4 answers
How to invoke method on proxy(Spring AOP) by reflection in Java?
An interface:
public interface Manager {
Object read(Long id);
}
A class which implements this interface:
@Transactional
Public class ManagerImpl implements Manager {
@Override
public Object read(Long id) {
// Implementation here
…
Radon
- 81
- 1
- 2
7
votes
2 answers
Example of multiple maximally specific methods that does not result in a compile-time error
I needed to dig into the specifics of method invocation in Java, and while reading the section Choosing the Most Specific Method in The Java Language Specification (Java SE 12 Edition), I found that (1) during invocation multiple methods can be…
johnnyodonnell
- 1,838
- 3
- 16
- 34
7
votes
3 answers
Dynamically Invoking Class Method Args
I am working on something where I need to be able to pass an indexed array of args to a method, much like how call_user_func_array works. I would use call_user_func_array but it is not an OOP approach, which is undesired, and it requires the method…
Mike Mackintosh
- 13,917
- 6
- 60
- 87
6
votes
2 answers
How to check if a subroutine was called with an object invocation method or not
You can invoke a subroutine as a method using the two syntaxes in the example below.
But you can also invoke it not as an object.
#====================================================
package Opa;
sub opa{
$first= shift;
$second= shift;
…
Diego Saravia
- 115
- 5
5
votes
1 answer
What's the difference between $.attribute and self.attribute inside a class in Raku?
For example, in this class Foo both methods b and c return the same value:
class Foo {
method a { 42 }
method b { $.a }
method c { self.a }
}
my $foo = Foo.new;
say $foo.a; #=> 42
say $foo.b; #=> 42
say $foo.c; #=> 42
I noticed…
uzluisf
- 2,586
- 1
- 9
- 27
5
votes
2 answers
How to map hash items to method parameters?
I have a method with a lengthy list of optional arguments, such as:
def foo(foo = nil, bar = nil, baz = nil, qux = nil)
# no-op
end
I thought that calling the method and passing a split hash as a parameter would map the hash items to parameters…
Filip Dupanović
- 32,650
- 13
- 84
- 114