Already discussed here: https://news.ycombinator.com/item?id=12734332 https://news.ycombinator.com/item?id=12734332 Edit: and maybe, based on what formula1 no

Already discussed here: https://news.ycombinator.com/item?id=12734332 https://news.ycombinator.com/item?id=12734332 Edit: and maybe, based on what formula1 noted, the OP uses HN to get the "homework answers" for him?