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ranjib/example.rb

Created March 13, 2014 17:31
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example.rb
class MyRecipe
end
module Extension
def foo
end
end
r1 = MyRecipe.new
r2 = MyRecipe.new
r1.instance_eval do
extend Extension
end
r1.respond_to?(:foo) # true
r2.respond_to?(:foo) # false
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