Created
July 5, 2019 13:12
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| defmodule List do | |
| def flatten(list, acc \\ []) | |
| def flatten([], acc), do: acc | |
| def flatten([[] | t], acc), do: flatten(t, acc) | |
| def flatten([h | t], acc) when is_list(h), do: flatten(h, flatten(t, acc)) | |
| def flatten([h | t], acc), do: [h | flatten(t, acc)] | |
| end |
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