[erlang-questions] Deleting last line in the Erlang Shell

Jordan Wilberding <>
Wed Apr 25 23:19:53 CEST 2007


That still doesn't quite do what I want to do, I want to have an input 
line, then when you hit
enter, get the input, you just clear the prompt and start over.

This is kind of what I want, but instead of writing over the previous 
line, it writes over prompt.

-module(abc).
-export([start/0]).
start() ->
  io:get_line('input> '),
  io:format([13|"      "], []),
  start().

So I want something like this

input> test (hit enter)

then I just get:

input>

instead I get:

input> test
input>

Thanks!
Jordan Wilberding

Torbjorn Tornkvist wrote:
> Jordan Wilberding wrote:
>   
>> The \r doesn't seem to do anything in Erlang. Any other ideas?
>>     
>
> Try this program, like this: erl -noshell -s abc
> -------------------------------------------
> -module(abc).
> -export([start/0]).
> start() ->
>      [print(integer_to_list(I)) || I <- [1,2,3,4,5,6,7,8,9]], erlang:halt().
> print(S) -> io:format([13|S], []), timer:sleep(1000).
> ---------------------------------------------
>
> Cheers, Tobbe
>
>
>
>   
>> Thanks!
>> Jordan Wilberding
>>
>> Mazen Harake wrote:
>>     
>>> This reply is getting ugly... sorry for spaming your inboxes!
>>>
>>> the correct line should be
>>>
>>> io:format("\r")
>>>
>>> Cheers!
>>>
>>> Mazen wrote:
>>>   
>>>       
>>>> Maybe an ugly way of doing it but on top of my head you can do
>>>>
>>>> io:format("r")
>>>>
>>>> which will bring you back on the same line (which you can then overwrite). Don't know if the there is a special way to do it. I have never actually done an command line interactive program in Erlang myself :)
>>>>
>>>>
>>>> Guest wrote:
>>>> Hello,
>>>>
>>>> I have a simple program that takes input via io:get_line/1 in a loop.
>>>>
>>>> However, when I hit enter I would like for it to just clear the line
>>>> instead of printing a new input line. Is there any way to do this with
>>>> in the erlang shell?
>>>>
>>>> Thanks!
>>>> Jordan Wilberding
>>>> _______________________________________________
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