use zip + Hash.[] rather than looping with an index

activerecord/lib/active_record/base.rb

@@ -988,9 +988,7 @@ def self.#{method_id}(*args)                        # def self.scoped_by_user_na
         end
 
         def construct_attributes_from_arguments(attribute_names, arguments)
-          attributes = {}
-          attribute_names.each_with_index { |name, idx| attributes[name] = arguments[idx] }
-          attributes
+          Hash[attribute_names.zip(arguments)]
         end
 
         # Similar in purpose to +expand_hash_conditions_for_aggregates+.