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Is there an equivalent to the prepend method in ruby ​​1.9.3?

I need to use a method prepend

introduced in ruby ​​2.0 in ruby ​​1.9.3 where this method is not supported. Is there an equivalent method in ruby ​​1.9.3?

UPDATE

I need this to work with ruby ​​1.9.3

module ActiveAdmin::Views::Pages::BaseExtension
  def add_classes_to_body
    super
    @body.set_attribute "ng-app", "MyApp" #I need to add this line
  end
end
class ActiveAdmin::Views::Pages::Base
  prepend ActiveAdmin::Views::Pages::BaseExtension
end
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2 answers


prepend

changes the underlying Ruby object model, specifically the way messages are sent, in pure Ruby there is no way to do this, so there is no way to back up functionality prepend

.

In the good old days before, prepend

we used this instead:



class ActiveAdmin::Views::Pages::Base
  orig = instance_method(:add_classes_to_body)

  define_method(:add_classes_to_body) do
    orig.bind(self).()
    @body.set_attribute "ng-app", "MyApp"
  end
end
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I could make it work using alias_method



class ActiveAdmin::Views::Pages::Base
  alias_method :old_add_classes_to_body, :add_classes_to_body

  def add_classes_to_body
    old_add_classes_to_body
    @body.set_attribute "ng-app", "MyApp"
  end
end
0


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