From: Matthew Moss <matthew.moss.coder@...>
Date: 2006-03-22T08:10:48+09:00
Subject: Re: Newbie: Printing hex formatted string using printf

> Why does printf act like a private method here?

printf is not a method on Fixnum. The error is confusing (except that
the first word is "NoMethodError").

If you want to use printf, just do:

$stderr.printf "Magic number is: %X\n", magic_number

Or, more ruby-ish:

puts "Magic number is: #{magic_number.to_s(16)}"