class Array
  # Wraps the object in an Array unless it's an Array.  Converts the
  # object to an Array using #to_ary if it implements that.
  def self.wrap(object)
    if object.nil?
      []
    elsif object.respond_to?(:to_ary)
      object.to_ary
    else
      [object]
    end
  end
end