From: Leslie Viljoen <leslieviljoen@...>
Date: 2008-05-30T00:36:27+09:00
Subject: Re: Surprising Extend

>
> Can you show some real code and real error messages?  Normally there
> should not be an issue with your first approach.

Ah, I was making DOS files on Linux. That thwarted my modulating.

But I can still only extend String instances (s.extend) - I want to extend the
String class. Here's my attempt:

----In StringExt.rb:

module StringExt
	def to_hex
		unpack("C*").map{|b| b.to_s(16)}.join(" ")
	end
end

----In use.rb:

require 'StringExt'

String.extend StringExt
s = "anystringwilldo"
puts s.to_hex

----
I get "undefined method to_hex" for my string.


Thanks!
Les