What was wrong with the answer you got when you posted this 14 hours ago?
http://news.ycombinator.com/item?id=4593968
I see that the answer there gave some information and asked for a clarification, and yet you didn't bother to answer.
http://news.ycombinator.com/item?id=4593968
I see that the answer there gave some information and asked for a clarification, and yet you didn't bother to answer.