I have a custom class located in lib and I want to create one instance of开发者_如何学编程 it that I can call anywhere in my Rails app--from controllers to rake tasks.
First, this may not be the best title, but it seems to make sense at this time. What I\'m looking at is loading a resource which should live for the life of the web app. There may be some provisioni
I have a singleton MyClass in Objective-C.In the singleton, let\'s say I have a method -(void)foo that other classes message using [[MyClass sharedManager] foo].
I want to extend or copy the PopUpManager class to add the ability to keep track of the number of windows.
When designing a singleton class which can be used by multiple threads I run into the following challenge:
There are cases when there is a class which has no inherent reason to be a singleton or static, yet it also doesn\'t make much sense in creating more than 1 instance of it.
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical andcannot be reasonably answered in its current form. For help clari
when using singletons, if the class has instance fields should you be careful 开发者_Python百科when several threads might be using the singleton? (And the fields are mutable and their values can be ch
I have been developing Cocoa Apps for a while and I have a conceptual question regarding the Singleton \"pattern\" and the use of the NSNotificationCenter for communication.
I am using the database adaptor from devx.com I was wondering if I should make it a singleton so I can 开发者_开发技巧easily use it from a number of different classes without having to worry about mu
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