I have a map (errors of Ecto.Changeset) like that:
%{ field_a: ["error 1", "error 2"], field_b: ["something here"] } I want it to be a
[ "field_a error 1", "field_a error 2", "field_b something here" ] I tried to implement it with
Enum.map(map, fn({ key, errors }) -> # another anonymous function which generates strings end) but got a compilation error since elixir doesn't support nested anonymous functions right now.
How can I implement this convertation?
Although you can use Enum.flat_map, I believe a for would be clearer here:
errors = %{ field_a: ["error 1", "error 2"], field_b: ["something here"] } formatted = for {field, messages} <- errors, message <- messages, do: "#{field} #{message}" IO.inspect formatted Output:
["field_a error 1", "field_a error 2", "field_b something here"] but got a compilation error since elixir doesn't support nested anonymous functions right now.
That's for anonymous recursive functions; Elixir supports nested anonymous functions just fine.
