From: "Aaron D. Gifford" <astounding@...>
Date: 2010-08-08T08:38:55+09:00
Subject: Re: question about sub-class of array

Unrelated to your question, your code example made me curious:

class Bitvector < Array
 def initialize(*)
   @a = super
 end
 def to_s
   # convert Bitvector, ordered lsb to msb,
   # to string of 0s and 1s, ordered msb to lsb
   @a.map{|i| i.to_s(2)}.reverse.join
 end
end

Q: Is there any benefit to storing a copy of self in @a? Is there any
drawback to eliminating the initialize definition in the child class
and replacing the "@a" in the to_s method with "self"? What am I
missing?

Wondering,
Aaron out.