gistfile1.rb

# given a model with a postgres array data type called 'wishlist'

# I know I can do
def add_item_to_wishlist(item)
  wishlist_will_change!
  wishlist = wishlist | item
end

# can I do something like:
def wishlist << (*items)
  wishlist_will_change!
  write_attribute(:wishlist, wishlist | items)
end