rr(Mod) in the shell

Ulf Wiger (AL/EAB) <>
Wed Sep 7 15:55:25 CEST 2005


Agreed. I think it's a good idea too  ;-)
(http://www.erlang.org/ml-archive/erlang-questions/200505/msg00201.html)

One problem I ran into was printing from a remote shell.
I haven't checked whether that will be a problem with
your code as well, and it wasn't actually clear to me
why it was happening at all. Something about the translation
of pids, I think, that causes it not to find the ets table
(because it gets confused about whether it is local or remote)

Perhaps that's something one can live with...

/Uffe

> -----Original Message-----
> From: 
> [mailto:]On Behalf Of Claes Wikstom
> Sent: den 7 september 2005 13:10
> To: 
> Subject: rr(Mod) in the shell
> 
> 
> 
> 
> I've become totally and completely addicted to the
> feature of the shell where rr(Mod) in the shell reads the record
> defs of the Module and displays the records nicely in the shell.
> 
> It would be very nice if also records could be nicely printed by
> io:format so we could get nice record printouts in logs. Our
> logs are widely populated by ugly record printouts.
> 
> I've patched shell.erl and io_lib_format.erl to accomplish
> this. The format char for records is ~r (ofcource)
> 
> I'm not claiming that I understand the code in io_lib
> but if you all think that this is also a nice fetaure, maybe
> someone who understands the io_lib code better than me
> could do it properly.
> 
> 
> As an example, as session from the shell:
> 
> ()3> [P] = mnesia:dirty_read({person, 6003310130}).
> [{person,6003310130,
>           "Claes",
>           "Wikstrom",
>           {addr,[],"Malarhojdsvagen 5a",98765,"Stockholm",[],[],[]},
>           [],
>           [],
>           [],
>           [{53,"247332"}],
>           0,
>           [{4,63279658768},
>            {2,63292552384},
>            {5,63280394364},
>            {3,63283554755},
>            {53,63291634548}],
>           63291634548,
>           ok,
>           262145024,
>           [],
>           [],
>           0}]
> 
> ()4> io:format("Person ~r", [P]).
> Person #person{pno = 6003310130,
>          fname = "Claes",
>          lname = "Wikstrom",
>          addr = #addr{careof = [],
>                street = "Malarhojdsvagen 5a",
>                postno = 98765,
>                city = "Stockholm",
>                telno = [],
>                cellno = [],
>                email = []},
>          post_addr = [],
>          extra_company_addrs = [],
>          passwd = [],
>          estore_names = [{53,"247332"}],
>          blacklisted = 0,
>          crdata = [{4,63279658768},
>           {2,63292552384},
>           {5,63280394364},
>           {3,63283554755},
>           {53,63291634548}],
>          crdate = 63291634548,
>          crresult = ok,
>          credlimit_bits = 262145024,
>          letters = [],
>          email = [],
>          flags = 0}ok
> 
> 
> 
> 
> The solution (which I believe has been up for disccussion
> earlier here on the list) is pretty expensive, since all
> record defs from all modules are kept in an ets table. I'd
> say it's worth it though, and if the feature isn't used, the
> ets table never gets created.
> 
> 
> What do you think ??
> 
> 
> /klacke
> 
> 



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