solution for destination city using elixir

DestinationCity/destinationCity.exs

@@ -0,0 +1,21 @@
+# Solution for: https://leetcode.com/problems/destination-city/description/
+defmodule Solution do
+
+  defp get_empty_city([], map), do: map
+
+  defp get_empty_city([[from, to] | tail], map) do
+    get_empty_city(tail, Map.put(map, from, to))
+  end
+
+  @spec dest_city(paths :: [[String.t]]) :: String.t
+  def dest_city(paths) do
+    map = get_empty_city(paths, %{})
+    map |> Enum.reduce("", fn({k, v}, acc) ->
+      if map[v] != nil do
+        acc
+      else
+        v
+      end
+    end)
+  end
+end