From: Pete <pertl@...>
Date: 2006-06-24T05:20:55+09:00
Subject: Re: class << self?

alias static method:

class Test
  def self.foo
    puts "foo"
  end

end

class Test
  class << self
    alias :bar :foo
  end
end

Test.bar



Roger Johansson schrieb:
> Can someone please explain exactly what "class << self" does , I just 
> dont get it.
>
> I was trying to alias some static methods with no luck but later found 
> some webpage saying that I need "class << self" to make the code run in 
> a static context.
>
> I know that even if I make a static method inside Class, there is still 
> a "self" object , so I guess even though Im in a static method it 
> somehow belongs to the class object that represents the type Im calling 
> my static method on?
>
> eg:
>
> MyType.my_static_method(); #<- will execute in the context of the Class 
> instance "MyType" ?, or???
>
> and when I do class << self , I'll enter the static context of "MyType" 
> , meaning "self" would no longer be "MyType" ?
>
> and even if that is the case, why are all my local variables out of 
> scope inside that block?
> I mean its still the same method that executes, or are the variables 
> somehow bound to the objects in which the method executes, even if they 
> are method local?
>
> Im really confused here :-)
>
> //Roger
>
>