[erlang-questions] unexpected result of term_to_binary

Steve Davis <>
Mon Jan 21 21:24:05 CET 2013


Even better solution is to send "lists of integers" as tuples:
2> term_to_binary({1,2,3,4}).   
<<131,104,4,97,1,97,2,97,3,97,4>>

:-)
/s


On Jan 21, 2013, at 2:15 PM, Steve Davis <> wrote:

> Hi Dmitry,
> 
> Unfortunately, Bert-js suffers from the same ambiguity client side.
> 
> I have in fact found a reasonable hack which only costs an extra byte and is to prepend NIL_EXT to the list:
> 1> term_to_binary([[],1,2,3,4]).
> <<131,108,0,0,0,5,106,97,1,97,2,97,3,97,4,106>>
> 
> Best,
> Steve
> 
> On Jan 21, 2013, at 2:13 PM, Dmitry Kolesnikov <> wrote:
> 
>> Hi Steve,
>> 
>> There is a well document External Term Format protocol. I am not here to judge that protocol but it is implementable on other languages as well (https://github.com/rustyio/BERT-JS). Yes, it make sense in scopes of that protocol specification. 
>> 
>> Long time ago, I've been trying to use it for WebApp development and … switched to JSON. :-)
>> But I strongly believe that External Term Format make sense for other use-case...
>> 
>> 
>> Best Regards,
>> Dmitry
>> 
>> 
>> On Jan 21, 2013, at 10:00 PM, Steve Davis <> wrote:
>> 
>>> Hi Dmitry,
>>> 
>>> It "makes sense" only if the "binary_to_term" decode is done in erlang.
>>> 
>>> br,
>>> /s
>>> 
>>> On Jan 21, 2013, at 1:53 PM, Dmitry Kolesnikov <> wrote:
>>> 
>>>> Hello,
>>>> 
>>>> This make sense to me!
>>>> 
>>>> term_to_binary/1 returns a binary data object which is the result of encoding Term according to the Erlang external term format. See http://erlang.org/doc/apps/erts/erl_ext_dist.html
>>>> 
>>>> Use list_to_binary or unicode:character_to_binary depends on your use-case.
>>>> 
>>>> - Dmitry
>>>> 
>>>> On Jan 21, 2013, at 9:38 PM, Steve Davis <> wrote:
>>>> 
>>>>> The following appears to encode lists of integers as strings (?!?):
>>>>> 
>>>>> Eshell V5.9.3  (abort with ^G)
>>>>> 1> term_to_binary([1,2,3,4]).
>>>>> <<131,107,0,4,1,2,3,4>>
>>>>> 
>>>>> Is there a reason for this that I'm missing?
>>>>> 
>>>>> regs,
>>>>> /s
>>>>> 
>>>>> _______________________________________________
>>>>> erlang-questions mailing list
>>>>> 
>>>>> http://erlang.org/mailman/listinfo/erlang-questions
>>>> 
>>> 
>> 
> 




More information about the erlang-questions mailing list