From: Devin Mullins <twifkak@...>
Date: 2007-06-05T21:32:27+09:00
Subject: Re: Writing method "change!" for String

Mike wrote:
> It should just change value of string to what I want. But I get error:
> "Can't change the value of self".

You really can't. Consider:
class Fixnum
   def double!
     self *= 2
   end
end
3.double! # wha happen?

> How do I proceed?
ri String#replace