The same technique can be used to map two-letter country codes like "us" or "za" to country names (262 = 676 table entries), 5-digit ZIP codes like 13083 to city names ( entries), etc. Invalid data values (such as the country code "xx" or the ZIP code 00000) may be left undefined in the table or mapped to some appropriate "null" value.
The same technique can be used to map two-letter country codes like "us" or "za" to country names (262 = 676 table entries), 5-digit ZIP codes like 13083 to city names ( entries), etc Invalid data values (such as the country code "xx" or the ZIP code 00000) may be left undefined in the table or mapped to some appropriat.e "null" value.