[erlang-questions] json handling map functions in erlang 17

Björn-Egil Dahlberg <>
Wed Feb 5 22:22:56 CET 2014


I have not read Joes final book on the matter (several drafts though) ..
and I've told him, twice I think, that there will *not* be any maps to json
BIFs to in the maps module. It does not belong in the standard library.

I do touch on the subject in the EEP (
https://github.com/erlang/eep/blob/master/eeps/eep-0043.md) under "protocol
construction".

However, it is encouraged that erlang json libraries make use of maps. =)

// Björn-Egil


2014-02-05 Zsolt Czinkos <>:

> Hi,
>
> I've read about some json handling functions in Joe Armstrong's book
> (Programming Erlang, 2nd Edition, Page 84): maps:to_json/1,
> maps:from_json/1 and maps:safe_from_json/1.
>
> Now, In erlang shell, I see this. No such functions.
>
> > maps:module_info(exports).
> [{fold,3},
>  {map,2},
>  {size,1},
>  {without,2},
>  {module_info,0},
>  {module_info,1},
>  {values,1},
>  {update,3},
>  {remove,2},
>  {put,3},
>  {new,0},
>  {merge,2},
>  {keys,1},
>  {is_key,2},
>  {from_list,1},
>  {get,2},
>  {find,2},
>  {to_list,1}]
>
> Are these json functions planned to be released in final 17.0?
>
> Thanks,
>
> Zsolt
> _______________________________________________
> erlang-questions mailing list
> 
> http://erlang.org/mailman/listinfo/erlang-questions
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://erlang.org/pipermail/erlang-questions/attachments/20140205/21785560/attachment.html>


More information about the erlang-questions mailing list