From: Rob Biedenharn <Rob@...>
Date: 2008-08-20T08:24:26+09:00
Subject: Re: overprinting characters


On Aug 19, 2008, at 6:20 PM, Matt Harrison wrote:

> I have a script that does things to large files > 1Gb and I want to be
> able to show the percentage through the current file.
>
> I know exactly how I will get the percentage, but I want to know how  
> to
> display it in the terminal.
>
> What I would like is the name of the current file, then on the next
> line, "currentbytes/totalbytes [xx%]" and I want it to update the
> characters in place without writing hundreds of lines to the terminal.
>
> I think I want to be able to position the cursor back to the beginning
> of the current line but I have no idea how to do this in ruby.
>
> Grateful for any ideas
>
> Thanks
>
> Matt

In addition to print "\r" you might want to look at the docs for  
ProgressBar

http://raa.ruby-lang.org/project/progressbar/

I can't remember where I used this or I'd drop an example in here, but  
it gives to a bar similar to what sftp or curl shows on downloads (it  
even gives a time to complete estimate).

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com