From: William James <w_a_x_man@...>
Date: 2007-10-05T01:00:08+09:00
Subject: Re: Human readable file sizes

On Oct 4, 5:05 am, "Jesús Gabriel y Galán" <jgabrielyga...@gmail.com>
wrote:
> Hi,
>
> I have a list of files and I need to produce a string containing the
> size of each file, but in human readable format. With that I mean
> something like what df -h does: make an approximation to the nearest
> unit (B, KB, MB, GB, etc). Is this already done somewhere? This is
> what I have now:
>
> Find.find(folder) do |file|
>     match = regexp.match(File.basename(file));
>     if match
>         size = File.stat(file).size
>         puts size # would like a human readable format
>     end
> end
>
> Thanks,
>
> Jesus.

def kilo n
  count = 0
  while  n >= 1024 and count < 4
    n /= 1024.0
    count += 1
  end
  format("%.2f",n) + %w(B KB MB GB TB)[count]
end

[1,1024,1_000_000,8_000_000,9_000_000_000,
  3_000_000_000_000].each{|n|
  puts kilo(n)
}