region.rb in worldwide-0.4.0

- old
+ new

@@ -108,10 +108,14 @@
     # E.g., "Sao Tome And[sic] Principe" for "ST".
     # This name should _never_ be shown in the user interface.
     # This name is the name that was traditionally returned by "country_db".
     attr_reader :legacy_name
 
+    # Other names that may be used to refer to this region.
+    # E.g., "Czech Republic" is also known as "Czechia".
+    attr_accessor :name_alternates
+
     # iso_code values of regions (subdivisions) within the same country that border this region.
     # E.g., for CA-ON, the neighbouring zones are CA-MB, CA-NU and CA-QC.
     attr_accessor :neighbours
 
     # The ISO-3166-1 three-digit code for this region (returned as a string to preserve
@@ -436,10 +440,10 @@
     def inspected_fields
       INSPECTION_FIELDS.map { |field_name| "@#{field_name}=#{send(field_name).inspect}" }.join(", ")
     end
 
     def parent_country
-      parents.find(&:country?)
+      @parent_country ||= parents.find(&:country?)
     end
 
     # Checks whether the given value is acceptable according to the regular expression defined for the country.
     # @param value [String] for the postal code
     # @return [Boolean]