From: Carlos <angus@...>
Date: 2006-11-08T02:57:57+09:00
Subject: Re: How to make a cycling counter from commandline?

Tim Pease wrote:

> On 11/7/06, darenbell@gmail.com <darenbell@gmail.com> wrote:
> 
>> Hi, I'm looking for a way to implement this idea:
>>
>>
>> -------------------------------------
>> count=1
>> total=15
>>
>> until count>total
>>   print "Record #{count} of #{total} processed."
>>   count+=1
>> end
>> -------------------------------------
>>
>>
> 
> $ cat tmp.rb
> 
> STDOUT.sync = true
> 
> total = ARGV[0] || 15
> count = 1
> 
> until count>total
>  print "\rRecord #{count} of #{total} processed"
>  count += 1
>  sleep 0.25
> end
> 
> print "\n"
> 
> 
> That should do you what you want.  The secret is the carriage return
> "\r" at the beginning of the print string. That will bring the cursor
> back to the beginning of the line and then overwrite anything
> currently on that line.

 From my BBS years I remember adding... mmm... �"\033[K"? at the end of 
the string when I did this kind of overwriting. That ANSI code (if I 
remembered it correctly) clears everything until the end of line 
--useful in case the new string is shorter than the overwritten one. 
(This doesn't happen in this case, but maybe the OP wants to print 
"#{total} record processed" afterwards.)

Greetings.
--