I understand that (class << self; self; end) returns the singelton class
of object that is calling it but why would use that instead of self <<
MyClass ...?
For example, arent these all equivalent?
class << String
def foo
puts "foo"
end
end
class String
class << self
def foo
puts "foo"
end
end
end
class String
(class << self; self; end).module_eval do
def foo
puts "foo"
end
end
end
So why would you use the more obscure (class << self; self; end)
technique? Can someone please explain.
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