iex> handle_result = fn

...>   {:ok, result} -> IO.puts "Handling result..."

...>   {:ok, _} -> IO.puts "This would be never run as previous will be matched beforehand."

...>   {:error} -> IO.puts "An error has occurred!"

...> end

​

iex> handle_result.({:ok, some_result}) # Handling result...

iex> handle_result.({:error}) # An error has occurred!