But he's defining the numbers with a property that makes them countably infinite? prefix = '0.'; queue = new Queue(prefix); for(;;){ s = qu

But he's defining the numbers with a property that makes them countably infinite? prefix = '0.'; queue = new Queue(prefix); for(;;){ s = queue.poll(); for(c:['0'...'9']){ queue.add(s + c); } } When the constraint is "run forever" I don't think that the generator he defined produces results any different from the snippet above.