ISO639.to_iso639_1
You're seeing just the function
to_iso639_1
, go back to ISO639 module for more information.
Specs
expects as input downcased ISO 639-2 or ISO 639-2/B language code and returns ISO 639-1 code if it exists in standard and nil
if not. If function receives as input ISO 639-1 language code, it's returned unchanged.
Examples
iex> ISO639.to_iso639_1("sag")
"sg"
iex> ISO639.to_iso639_1("en")
"en"
iex> ISO639.to_iso639_1("ace")
nil