gistfile1.txt

require "rubygems"
require "sandbox"

s = Sandbox.new
s.eval %{
  class Book
    attr_accessor :author, :title
    def initialize(a, t)
      @author, @title = a, t
    end
  end
}

book = s.eval("book = Book.new('Stanislaw Lem', 'The Star Diaries')")