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I got this when i run the command "application:start(simple_cache)."
{error,
{bad_return,
{{sc_app,start,[normal,[]]},
{'EXIT',
{undef,
[{sc_app,start,[normal,[]],[]},
{application_master,start_it_old,4,
[{file,"application_master.erl"},{line,272}]}]}}}}}

=INFO REPORT==== 2-Apr-2015::11:37:28 ===
application: simple_cache
exited: {bad_return,
{{sc_app,start,[normal,[]]},
{'EXIT',
{undef,
[{sc_app,start,[normal,[]],[]},
{application_master,start_it_old,4,
[{file,"application_master.erl"},
{line,272}]}]}}}}
type: temporary

Would you be open to having your code ported over to the Elixir equivalent? It would be a great teaching tool. Thank you! @ericbmerritt @martinjlogan @richcarl

Hi,

do you plan to update the book to reflect trends in the community and language?

Thanks,
Chris

when using
gen_server:start_link({local, ?SERVER}, ?MODULE, [Port], []).
...................
{ok, LSock} = gen_tcp:listen(lists:nth(1, Port), [{active, true}),
get a problem
** exception exit: function_clause
in function inet_tcp:getserv/1
called as inet_tcp:getserv([1055])

so I tried that
{ok, LSock} = gen_tcp:listen(lists:nth(1, Port), [{active, true}]),
now it goes well.

why does it have this problem?

=SUPERVISOR REPORT==== 5-Oct-2011::11:40:20 ===
Supervisor: {<0.134.0>,gws_connection_sup}
Context: child_terminated
Reason: {function_clause,
[{gws_server,handle_info,
[{http,#Port<0.2726>,
{http_header,24,'User-Agent',undefined,
<<"curl/7.21.0 (i486-pc-linux-gnu) libcurl/7.21.0 OpenSSL/0.9.8o zlib/1.2.3.4 libidn/1.15 libssh2/1.2.6">>}},
{state,#Port<0.2725>,#Port<0.2726>,
{http_request,'GET',
{abs_path,<<"/foo">>},
{1,1}},
[],<<>>,0,hi_server,[],<0.134.0>}]},
{gen_server,handle_msg,5},
{proc_lib,init_p_do_apply,3}]}
Offender: [{pid,<0.135.0>},
{name,gws_server},
{mfargs,{gws_server,start_link,
[hi_server,#Port<0.2725>,[]]}},
{restart_type,temporary},
{shutdown,brutal_kill},
{child_type,worker}]

Will get "illegal bit size" error message.
System info: Erlang/OTP 20 [erts-9.3.2]

Hi,

I'm following this book chapter by chapter, and so far I have enjoyed it a lot!. However, now I'm struggling with the get_count function. It seems that is not possible to call tr_server:get_count(). from telnet because this will cause a deadlock on the server side:

telnet localhost 1055
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
tr_server:get_count().
{timeout,{gen_server,call,[tr_server,get_count]}}
Connection closed by foreign host.

This makes sense to me, because handle_info is performing a call to tr_server:get_count() that performs a sync call to the server.

The thing that I don't understand is why when I'm calling get_count from the erlang console I get the same error:

13> tr_server:start_link(1055).
{ok,<0.76.0>}
14> tr_server:get_count().     
** exception exit: {timeout,{gen_server,call,[tr_server,get_count]}}
     in function  gen_server:call/2 (gen_server.erl, line 180)

The thing that makes more sad is the fact of why we define a get_count function if we cannot use it at all.

It would be great if you could help to understand this issue. I'm using the exact file from the repo, so I'm not introducing any noise.

Thanks,

let {code, type} = await navigator.credentials.get({otp: {transport: ["sms"]}});
// code == "123ABC78"
// type == "otp"

run after ok, how to used the api?
I tried and failed :
3> simple_cache:insert(lee, "leeyi").
...
4> simple_cache:insert(lee, leeyi).
...
5> simple_cache:insert(lee, 33).
...
6> simple_cache:insert(lee, [leeyi,dd]).
...
9> simple_cache:insert('lee', 'dd').
** exception error: bad argument
in function ets:lookup/2
called as ets:lookup(sc_store,lee)
in call from sc_store:lookup/1 (src/sc_store.erl, line 17)
in call from simple_cache:insert/2 (src/simple_cache.erl, line 8)

The Manning book page doesn't have any visible links to an Errata page; however, that's where the two errata list links I found mentioned in the book forum redirect to.

(quote):
"The current errata list can always be found at http://www.manning.com/logan/excerpt_errata.html (or go to http://www.manning.com/logan/ and follow the link named "Errata", under Resources/Look inside)."

...from the current Book forum thread here:

https://forums.manning.com/forums/erlang-and-otp-in-action

thread:
"errata update 12/06/2010"
https://forums.manning.com/posts/list/24035.page

Manning book page
https://www.manning.com/books/erlang-and-otp-in-action