Class << self

ruby-talk
1

Hi
   I have code like

   class A
     class <<self
        def first

···

-------
        end
        def second
          ------
         end
      end
    end

    What I understood is now the def first and second becomes class
methods of class A..Am I right? Is that its only use?

Thanks in advance
Sijo
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2

Hi --

···

On Tue, 20 Jan 2009, Sijo Kg wrote:

Hi
  I have code like

  class A
    class <<self
       def first
        -------
       end
       def second
         ------
        end
     end
   end

   What I understood is now the def first and second becomes class
methods of class A..Am I right? Is that its only use?

class << object puts you in a class definition block for the singleton
class of object. Creating class methods is the most common use case,
but it works on any object (other than a few built-ins that aren't
allowed to have singleton classes).

David

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