Data update

Task/Remove-duplicate-elements/Elixir/remove-duplicate-elements.ex

@@ -0,0 +1,27 @@
+defmodule RC do
+  # Set approach
+  def uniq1(list), do: MapSet.new(list) |> MapSet.to_list
+
+  # Sort approach
+  def uniq2(list), do: Enum.sort(list) |> Enum.dedup
+
+  # Go through the list approach
+  def uniq3(list), do: uniq3(list, [])
+
+  defp uniq3([], res), do: Enum.reverse(res)
+  defp uniq3([h|t], res) do
+    if h in res, do: uniq3(t, res), else: uniq3(t, [h | res])
+  end
+end
+
+num = 10000
+max = div(num, 10)
+list = for _ <- 1..num, do: :rand.uniform(max)
+funs = [&Enum.uniq/1, &RC.uniq1/1, &RC.uniq2/1, &RC.uniq3/1]
+Enum.each(funs, fn fun ->
+  result = fun.([1,1,2,1,'redundant',1.0,[1,2,3],[1,2,3],'redundant',1.0])
+  :timer.tc(fn ->
+    Enum.each(1..100, fn _ -> fun.(list) end)
+  end)
+  |> fn{t,_} -> IO.puts "#{inspect fun}:\t#{t/1000000}\t#{inspect result}" end.()
+end)