As @ken-kost said, you might want to use stream. Instead of List.flatten/1 you can use Stream.transform/3. Your final call can be Enum.sort/1 which will turn the stream into a list.
As @ken-kost said, you might want to use stream. Instead of List.flatten/1 you can use Stream.transform/3. Your final call can be Enum.sort/1 which will turn the stream into a list.
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