Ch-05 Correction in Listing 5.12 (todo_server.ex)

[noslav]

Again, this is a synthesis of techniques you’ve seen previously. You send a message and wait for the response. In the corresponding process_message/2 clause, you delegate to TodoList, and then you send the response and return the unchanged to-do list. This is needed because loop/2 takes the result of process_message/2 as the new state.

In the above paragraph, loop/2 should be replaced with loop/1 as there is no loop function in this module with an arity of 2.