From: 7stud -- <bbxx789_05ss@...>
Date: 2011-05-13T03:21:58+09:00
Subject: Re: where does the pure method defined when starting irb

puts RUBY_VERSION

puts self       #=>main
puts self.class #=>Object

def hello
end

puts Object.private_methods.grep(/^h/) #=>hello

puts self.singleton_class.instance_methods.include?(:hello)
#=>false

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