Function iso3166_3::validity

pub fn validity<'a>(from: Option<i16>, to: Option<i16>) -> Option<Vec<FormerCountryCode<'a>>>

Returns an Option> of ISO 3166-3 country codes that were valid from a range of two given years.

Examples

Retrieve codes valid from years 1974-1990:

extern crate iso3166_3;

fn main() {
    let countries = iso3166_3::validity(Some(1974), Some(1990)).unwrap();
}

Retrieve codes valid from the year 1990 onward:

extern crate iso3166_3;

fn main() {
    let countries = iso3166_3::validity(Some(1990), None);
}

Retrieve codes valid until 1998 and prior:

extern crate iso3166_3;

fn main() {
    let countries = iso3166_3::validity(None, Some(1998));
}