module ISO3166::CountryClassMethods

def collect_countries_with(query_val, query_method = :alpha2, result_method = :itself)

Returns:

(Array) - An array of countries matching the provided query, or the result of applying `result_method` to the array of `Country` objects

Parameters:

result_method (Symbol) -- An optional method of `Country` to apply to the result set.
query_method (Symbol) -- An optional query method, defaults to Country#alpha2
query_val (String) -- A value to query using `query_method`

def collect_countries_with(query_val, query_method = :alpha2, result_method = :itself)
  return nil unless [query_method, result_method].map { |e| method_defined? e }.all?
  all.select { |country| country.send(query_method).include? query_val }
     .map { |country| country.send(result_method) }
end

Instance Methods