blank_slate.rb

# ===================
# Spell: Blank Slate
# ===================

# Remove methods from an object to turn them into Ghost Methods (http://gist.github.com/534776).

class C
  def method_missing(name, *args)
    "a Ghost Method"
  end
end

obj = C.new obj.to_s # => "#<C:0x357258>"

class C
  instance_methods.each do |m|
    undef_method m unless m.to_s =~ /method_missing|respond_to?|^__/
  end
end

obj.to_s # => "a Ghost Method" For more information, see page 84.

# For more information: http://www.pragprog.com/titles/ppmetr/metaprogramming-ruby