[erlang-questions] undefined function lib_chan:start/0

Harit Himanshu harit.subscriptions@REDACTED
Sat Jan 24 20:45:41 CET 2015


Thanks Joe

I will do that and let you know if I face any issues
+ Harit Himanshu

On Sat, Jan 24, 2015 at 9:48 AM, Joe Armstrong <erlang@REDACTED> wrote:

> lib_chan is the code tarball that accompanies the book
>
> Go to https://pragprog.com/titles/jaerlang2/source_code
>
> and download the source code from the book
>
> lib_chan.erl is in the sub directory of the unpacked code called
> "socket_dist".
>
> The examples in the book should work if you change directory to
> socket_dist and run the makefle in this directory.
>
> Hope this helps
>
> /Joe
>
>
>
>
>
> On Sat, Jan 24, 2015 at 3:44 PM, Harit Himanshu <
> harit.subscriptions@REDACTED> wrote:
>
>> I am learning Erlang from Joe's book and one of the thing he teaches is
>> about socket programming.
>> His code example runs like
>>
>> 1>* kvs:start().*
>>
>> true
>>
>> 2>* lib_chan:start_server().*
>>
>> Starting a port server on 1234...
>>
>> true
>>
>> I try to do the same thing with code he provided
>> -module(mod_name_server).
>> -author("harith").
>>
>> %% API
>> -export([start_me_up/3]).
>>
>> start_me_up(MM, _ArgsC, _ArgsS) ->
>>   loop(MM).
>>
>> loop(MM) ->
>>   receive
>>     {chan, MM, {store, K, V}} ->
>>       kvs:store(K, V),
>>       loop(MM);
>>     {chan, MM, {lookup, K}} ->
>>       MM ! {send, kvs:lookup(K)},
>>       loop(MM);
>>     {chan_closed, MM} ->
>>       true
>>   end.
>>
>>
>> But when I run, I see following
>>
>> 1> c(kvs).
>>
>> {ok,kvs}
>>
>> 2> c(mod_name_server).
>>
>> {ok,mod_name_server}
>>
>> 3> kvs:start().
>>
>> true
>>
>> 4> lib_chan:start().
>>
>> ** exception error: undefined function lib_chan:start/0
>>
>> 5> lib_chan_mm:start().
>>
>> ** exception error: undefined function lib_chan_mm:start/0
>>
>> 6>
>>
>>
>> I even tried for lib_chan_mm, but no luck
>>
>> What is going wrong here?
>>
>> Thank you
>> + Harit Himanshu
>>
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>>
>>
>
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