Country

gleam add country@1

import country

pub fn main() -> Nil {
  // get an Alpha3Code representation from the string
  let assert Ok(usa) = country.alpha_3_code_from_string("USA")
  assert usa == country.USA

  // get an Alpha2Code representation from the string
  let assert Ok(us) = country.alpha_2_code_from_string("US")
  assert us == country.US

  // get the base Country type from both Alpha3Code and Alpha2Code and compare
  assert country.from_alpha_3_code(usa) == country.from_alpha_2_code(us)

  // get the base Country type from the numeric string
  let assert Ok(us) = country.from_numeric_code("840")
  assert us == country.UnitedStatesOfAmerica

  // attempt to get a Country type from an incorrect numeric code value
  let assert Error(country.IncorrectNumericCode) =
    country.from_numeric_code("<incorrect>")

  Nil
}

Further documentation can be found at https://hexdocs.pm/country.