isValidFormat
Check if code matches common ISO 3166-1 standard. Just checks the format, doesn't look if the code actually exists.
Return
true if code format is valid.
Parameters
value
the numeric country code to check.
Check if code matches common ISO 3166-1 standard. Just checks the format, doesn't look if the code actually exists.
true if code format is valid.
the numeric country code to check.