2016 Update

Task/Non-continuous-subsequences/Elixir/non-continuous-subsequences.elixir

@@ -0,0 +1,24 @@
+defmodule RC do
+  defp masks(n) do
+    maxmask = trunc(:math.pow(2, n)) - 1
+    Enum.map(3..maxmask, &Integer.to_string(&1, 2))
+    |> Enum.filter_map(&contains_noncont(&1), &String.rjust(&1, n, ?0)) # padding
+  end
+
+  defp contains_noncont(n) do
+    Regex.match?(~r/10+1/, n)
+  end
+
+  defp apply_mask_to_list(mask, list) do
+    Enum.zip(to_char_list(mask), list)
+    |> Enum.filter_map(fn {include, _} -> include > ?0 end, fn {_, value} -> value end)
+  end
+
+  def ncs(list) do
+    Enum.map(masks(length(list)), fn mask -> apply_mask_to_list(mask, list) end)
+  end
+end
+
+IO.inspect RC.ncs([1,2,3])
+IO.inspect RC.ncs([1,2,3,4])
+IO.inspect RC.ncs('abcd')