Implement a simple version of flatten

maps/myenum.exs

@@ -45,6 +45,23 @@ defmodule MyEnum do
     end
   end
 
+  # I gave up on these two.
   # split
   # take
 end
+
+defmodule MyList do
+	def flatten([]) do
+		[]	
+	end
+		
+	def flatten([head|tail]) do
+		# this is basically the recursion
+		flatten(head) ++ flatten(tail)
+	end
+	
+	def flatten(head) do
+		# if there's only on element, we make a list out of it, so that we can concat them
+		[head]
+	end
+end