From: James Edward Gray II <james@...>
Date: 2009-10-04T00:44:46+09:00
Subject: Re: Backporting Enumerator.new { ... } to Ruby 1.8.7

On Oct 3, 2009, at 9:46 AM, James Edward Gray II wrote:

> Or with a closure:
>
>  #!/usr/bin/env ruby -wKU
>
>  def fibonacci
>    n2 = n1 = nil
>    lambda {
>      if n2.nil?
>        n2 = 0
>      elsif n1.nil?
>        n1 = 1
>      else
>        n2, n1 = n1, n2 + n1
>        n1
>      end
>    }
>  end
>
>  fib = fibonacci
>  p Array.new(10) { fib.call }

I forgot to mention, there are some other good resources for code like  
this:

   http://moonbase.rydia.net/software/lazy.rb/

   http://blog.grayproductions.net/articles/infinite_streams

James Edward Gray II