From: Matt Brooks <mattbrooks@...>
Date: 2009-10-03T03:48:56+09:00
Subject: Re: Rolling String Buffer needed

Justin Collins wrote:
> If you want it to act like a queue with the last element being the head,
> then use pop/unshift.
> 
> irb(main):001:0> a = [1,2,3,4]
> => [1, 2, 3, 4]
> irb(main):002:0> a.pop
> => 4
> irb(main):003:0> a.unshift 5
> => [5, 1, 2, 3]
> irb(main):004:0> a.pop
> => 3
> irb(main):005:0> a
> => [5, 1, 2]
> 
> 
> -Justin


Awesome, I think I need the last approach.  So incorporating it into the 
class, I have...

 class MyBuff
    def initialize max_size, filename
      @max_size = max_size
      @list = []
      @file = File.open(filename, 'wb')
    end

    def add_to_front string
      @list.unshift string              #changed to unshift
      while @list.length > @max_size
        @file.write @list.pop
      end
    end

    def [] i
      @list[i]
    end
 end


Thanks to all, I think this will work great!
-Matt
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