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4

Another way:

def segment_path(path) do
  path_levels =
    path
    |> String.split("/", trim: true)
    |> length()

  path
  |> breadcrumb()
  |> Stream.iterate(fn
    {segment, segment_path} ->
      parent_path = String.replace_trailing(segment_path, "/#{segment}", "")
      breadcrumb(parent_path)
  end)
  |> Enum.take(path_levels)
  |> Enum.reverse()
end

def breadcrumb(path) do
  segment = path
  |> String.split("/")
  |> List.last()

  {segment, path}
end

The solution with this code unfolds like this:

path = "/some/path/to/nowhere"

1. {"nowhere", "/some/path/to/nowhere"}
2. {"to", "/some/path/to"}
3. {"path", "/some/path"}
4. {"some", "/some"}

Then it’s reversed.

I won’t add reasoning on why (or whether) this is better, but just another implementation. :slightly_smiling_face: