Can I find the file/linenumber where a method was defined?

Question

Duplicate: How To Find Where A Ruby Method Is Defined At Runtime

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With a given object, is it possible to find out where each method was defined?

Answer 1

After the fact, it will be pretty tough, but you can use a hook method to observe the line numbers where a method is defined.

class X < Object

  def X.method_added(symbol)
    puts "adding method #{symbol} to class X from #{caller(0)"
  end

end


class X
  def a_method
  end
end