From: Oliver Saunders <oliver.saunders@...>
Date: 2008-05-06T09:04:28+09:00
Subject: Re: Extending Array and assigning to self

yermej wrote:
> I would just use Array's own methods. E.g.:
> class Pages < Array
>   def import(file, page_delimiter = ' ')
>     self.clear
>     self.concat file.read.split.page_delimiter
>   end
> end
> 
> I'm not sure if Array#concat is the best choice here (for some
> definition of best), but it'll work.

Fantastic yermej. I didn't know about that concat method.

Next point: What if I have a similar problem with strings? I'd like to 
achieve this:

# is a string
x = ValueChangeString.new 'foo' #=> 'foo'
# has all the methods of string already
x.length #=> 3
# But also has methods that completely alter the string's value
# whilst remaining the same object
x.change_value! #=> 'bar'
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