From: Mark Volkmann <r.mark.volkmann@...>
Date: 2006-03-22T07:40:10+09:00
Subject: Re: Newbie: How do I get hex formatted bytes from a file?

On 3/21/06, Wes Gamble <weyus@att.net> wrote:
> I want to do:
>
> File.open(path_to_file, "r") do |f|
>         magic_number = f.read(8)
>         $stderr.print "Magic number is: #{magic_number}\n"
>       end
>
> but I want to print the bytes as HEX values - how do I do that?

You can do this with String.unpack. In the PickAxe 2 book, see table
27.14 "Directives for String#unpack". In my copy, it's on page 624.