From: Andy Frank <ridingwithrails@...>
Date: 2010-10-25T23:03:47+09:00
Subject: Class eval does not work with self

I am experimenting with a test class to figure out why self.class_eval
does not seem to work.  Please see code below:

 class Xclass
         def add_method(meth, work)
          self.class_eval %Q{
                 def #{meth}
                         #{work}
                 end
                 }
         end
end

This throws an error when I call the class like so:

x = Xclass.new
x.add_method("add", "puts \"Hello World\"")


Error:
rb:3:in `add_method': undefined method `class_eval' for #
(NoMethodError)
  from test_dyn.rb:15:in `'


The fix has been to change self.class_eval  to Xclass.class_eval.
Anyone know why this is the case. Shouldn't self work.

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