From: James Edward Gray II <james@...>
Date: 2007-01-13T03:56:13+09:00
Subject: Re: Rake, Hoe, Meta-Programming, and Warnings (oh my!)

On Jan 12, 2007, at 11:24 AM, Tim Pease wrote:

> The warnings are coming from some meta-programming code that is
> redefining instance methods on the fly based on user input. So maybe a
> better question would be, is there a way to redefine methods without
> causing Ruby to spew out a warning each time the method is redefined.

Sure.  Watch:

#!/usr/bin/env ruby -w

class Test
   def override
     "original"
   end
end

Test.new.override  # => "original"

class Test
   def override # !> method redefined; discarding old override
     "warning"
   end
end

Test.new.override  # => "warning"

class Test
   undef :override
   def override
     "no warning"
   end
end

Test.new.override  # => "no warning"

class Test
   alias_method :old_override, :override
   def override
     "alias avoids warning too"
   end
end

Test.new.override  # => "alias avoids warning too"

__END__

Hope that helps.

James Edward Gray II