Methods related to using of the singleton design pattern.
Questions tagged [singleton-methods]
76 questions
3
votes
1 answer
Add class methods through include
I have Ruby class into which I want to include both class and instance methods. Following the pattern described here, I'm currently using the following:
class SomeObject
include SomeObject::Ability
def self.some_builder_method(params)
#…
user2398029
- 6,699
- 8
- 48
- 80
2
votes
1 answer
Deserializing Singleton
//Singleton
public class MainList implements Serializable {
private static MainList instance = new MainList();
private MainList() {}
public static MainList getInstance() {
return…
Nick Kulese
- 83
- 1
- 2
- 12
2
votes
2 answers
Singleton Controller Java
I was reading about singletons the other day and thought to implement them in a project of mine, but I didn't like the way it seemed to flow logically, so I created what I'd call a controller class to manage the state of the singleton object. I want…
Adam R. Turner
- 139
- 1
- 2
- 14
2
votes
2 answers
Ruby: execute singleton method in different context
(edited to make question more specific)
I would like to know if it's possible to execute a singleton method in the context of another object as in the following example:
class A
def initialize
@foo = 'foo'
end
end
def A.singleton(*args)
…
coxy
- 90
- 5
2
votes
1 answer
iOS Singleton API manager with dispatch_async/asynchronous methods: what's the implication?
It is a typical design pattern to use a Singleton to represent an "API Manager" object like this:-
class APIManager {
let ENDPOINT_URL = "http://remote-server-fqdn.com"
var storage : Storage!
var currentlyLoggedIn = false
class var…
Calvin Cheng
- 35,640
- 39
- 116
- 167
2
votes
2 answers
Java Fluent API - better method?
Say I have an object that I've created to further simplify reading an XML document using the DOM parser. In order to "step into" a node or element, I'd like to use a single line to go from the start of the document to my target data, buried…
DGolberg
- 2,109
- 4
- 23
- 31
2
votes
1 answer
Why can't I attach a singleton method to another object?
some_string = "i love lamp"
another_string = "i love desk"
def some_string.lovehate
if match /love/
sub /love/, "hate"
elsif match /hate/
sub /hate/, "love"
end
end
puts some_string.lovehate # => "i hate lamp"
puts…
87linux
- 23
- 3
2
votes
7 answers
Best way to call a method inside a singleton class
I have a singleton class
public class Singleton {
static Singleton instance;
public static Singleton getInstance()
{
if (instance == null)
{
instance = new Singleton();
}
return instance;
}
Consider a public function…
Arundas K V
- 801
- 2
- 14
- 28
2
votes
2 answers
Singleton Implementation. Blocking the alloc and init methods for external usage
I have a Class that I wish to implement as Singleton.
I wish that the only way an Instance of this class may be created / accessed is via:
+(MYClass*)sharedInstance
method. alloc and init are called within the method implementation (of course).
Is…
Ohad Regev
- 5,641
- 12
- 60
- 84
2
votes
1 answer
Where does `singleton` methods reside in Ruby?
I was playing with singleton class in my IRB. And doing so tried the below snippets.
class Foo ; end
#=> nil
foo = Foo.new
#=> #
foo.define_singleton_method(:bar , method(:puts))
#=> #
Here above I just…
Arup Rakshit
- 116,827
- 30
- 260
- 317
2
votes
1 answer
Difference between def myobject.mymeth and class << myobject; def mymeth
I am currently practicing/learning singleton methods and singleton classes in Ruby, and I have come across a doubt. Given:
myobject = Object.new
Is there any difference between doing this:
def myobject.mymethod
end
and doing this:
class <<…
Nobita
- 23,519
- 11
- 58
- 87
1
vote
1 answer
Singleton method error from bind when called with the same metaclass
I'm writing aspect-ish code more or less lifted from the chosen solution for this question that looks like the following:
class Module
def add_logging klass, *method_names
method_names.each do |method_name|
original_method =…
iftheshoefritz
- 5,829
- 2
- 34
- 41
1
vote
1 answer
Objective-C Singleton problem. Object recognized in one class but not another
My problem is that I can access methods and attributes from the sharedInstance Singleton in one class but I cannot in another.
For example, the code below works and is recognized by X-code. Works fine.
return [[[SINGLETON…
user819675
- 23
- 5
1
vote
0 answers
Should I go tightly coupled, with singleton, or loosely coupled, without a singleton? Azure Services, Xamarin Forms
I am making a Xamarin Forms Cross platform app.
I have been trying to figure out how to go about getting my app to integrate with the Azure Backend the best way.
I have ran into a problem. It has been drilled into my head to try to build programs as…
John Butler
- 41
- 5
1
vote
1 answer
Defining methods on instances of Fixnum's
I can define a method on an instance like this:
object = Object.new
def object.foo
puts "5"
end
Trying something similar with a Fixnum doesn't work:
def 3.foo
puts "3"
end
def 3.foo
^
(irb):7: syntax error, unexpected keyword_end,…
Nat
- 890
- 3
- 11
- 23