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Rails 5, Module#prepend, and the End of `Alias_method_chain` The Rails 4.2 announcement had some interesting news about the upcoming Rails 5: Itâs probably going to require Ruby 2.2. Which will make it the first Rails version to take advantage of all the good stuff from Ruby 2. The post mentioned garbage collected symbols and keyword arguments. But to me, one of the most interesting Ruby 2 feature
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