flatten_array

elixir/flatten-array/lib/flatten_array.ex

@@ -0,0 +1,21 @@
+defmodule FlattenArray do
+  @doc """
+    Accept a list and return the list flattened without nil values.
+
+    ## Examples
+
+      iex> FlattenArray.flatten([1, [2], 3, nil])
+      [1, 2, 3]
+
+      iex> FlattenArray.flatten([nil, nil])
+      []
+
+  """
+
+  @spec flatten(list) :: list
+  def flatten(list) do
+    list
+    |> List.flatten()
+    |> Enum.reject(&is_nil/1)
+  end
+end