Some notes on chapters.
Module reloading:
$ iex times.exs iex(1)> Times.double 4 8
Change code, and reload (still in the same REPL):
iex(2)> r Times
/Users/seletz/develop/elixir/elixir-getting-started/programming-elixir/times.ex:1: redefining module Times
{Times,[Times]}
Now, r remembers all reloaded modules, and calling r w/o arguments reloads them all:
iex(3)> r /Users/seletz/develop/elixir/elixir-getting-started/programming-elixir/times.ex:1: redefining module Times [Times]
iex> 'foo' # a list iex> "foo" # something else