From: Michael Fellinger <m.fellinger@...>
Date: 2008-11-07T09:06:54+09:00
Subject: Re: Showing a spinner ?

On Wed, Nov 5, 2008 at 1:22 AM, Rodrigo Bermejo
<rodrigo.bermejo@ps.ge.com> wrote:
> Aldric Giacomoni wrote:
>> How do I show a spinner on the command line interface when a ruby script
>> is working? I sometimes write things that take a while, and I know I get
>> impatient when all I see a blinking cursor :)
>> A spinner has \ | / - all in one spot so it looks like a spinning wheel.
>>
>> Thanks!
>>
>> --Aldric
>
> Here is the idea ..you can make it better..
>
> a=["-","\\","|","/"]
> n=0
> while 1 do
>    print a[n % 4]
>    print "\b"
>    n+=1
>    sleep 0.1
>    puts "..#{n}." if (n % 50==0)
> end

Just had the same thing lying around to keep ssh alive, not much in
terms of progress though
See http://0xcc.net/ruby-progressbar/index.html.en for a full lib that
handles this problem

sigma ~prog/ruby % cat spinner.rb
a = %w[ | / - \\ ]

$stdout.sync = true

loop do
  print a.unshift(a.pop).last
  sleep 0.1
  print "\b"
end