how to override [] brackets in ruby?

Question

I am writing an Ajax request form with Ruby on Rails using a collection_select tag that looks like this:

<%= collection_select(\"Jobs\", \"cl         


        

Answer 1

kmorris solved your problem (very well) but i would like to answer your question: you can override [] and []= operators because they are methods (like almost everything), but you should think well about what you are doing because you can break tons of things.

class AntiArray < Array

  def [](ind)
    self.fetch(-ind)
  end

end

y = AntiArray.new([1,2,3,4])

y[1]

=> 4