class << self

[Sijo Kg]

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

 

[David A. Black]

Hi --

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

--
David A. Black / Ruby Power and Light, LLC
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