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Re: where does the pure method defined when starting irb

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Brian Xue wrote in post #998397:
> Thanks all for your kindly explanation. It really helps.

Here's more:

class Object
  private

  def greet
    puts 'hello'
  end
end

class B
end

puts Object.private_instance_methods.include?(:greet)
puts B.private_instance_methods.include?(:greet)
puts self.singleton_class.private_instance_methods.include?(:greet)

not_inherited = false
puts 
self.singleton_class.private_instance_methods(not_inherited).include?(:greet)


--output:--
true
true
true
false

The lookup paths:

Object
  ^ private :greet
  |
  |
Class B
  ^
  |
  |
singleton class of b
  ^
  |
  |
b = B.new





Object
  ^ private :greet
  |
  |
singleton class of 'main'
  ^
  |
  |
 main


You really can't determine in which class a method is defined unless you 
call the *_methods() with false as the argument, which causes ruby to 
ignore inherited methods.

-- 
Posted via http://www.ruby-forum.com/.

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Thread

where does the pure method defined when starting irb Brian Xue <brxue.cn@gmail.com> - 2011-05-12 04:40 -0500
  Re: where does the pure method defined when starting irb jake kaiden <jakekaiden@yahoo.com> - 2011-05-12 06:17 -0500
  Re: where does the pure method defined when starting irb Christopher Dicely <cmdicely@gmail.com> - 2011-05-12 09:57 -0500
    Re: where does the pure method defined when starting irb Michael Edgar <adgar@carboni.ca> - 2011-05-12 10:12 -0500
    Re: where does the pure method defined when starting irb 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-12 14:00 -0500
      Re: where does the pure method defined when starting irb Brian Xue <brxue.cn@gmail.com> - 2011-05-12 18:57 -0500
        Re: where does the pure method defined when starting irb 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-12 21:07 -0500
          Re: where does the pure method defined when starting irb Brian Xue <brxue.cn@gmail.com> - 2011-05-16 19:54 -0500
            Re: where does the pure method defined when starting irb Michael Edgar <adgar@carboni.ca> - 2011-05-16 20:00 -0500
              Re: where does the pure method defined when starting irb Brian Xue <brxue.cn@gmail.com> - 2011-05-16 21:24 -0500
      Re: where does the pure method defined when starting irb 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-12 18:58 -0500
  Re: where does the pure method defined when starting irb 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-12 13:21 -0500
  Re: where does the pure method defined when starting irb 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-12 13:53 -0500

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