On Friday, October 16, 2015 02:03 PM, Per Nordlöw wrote: > zip(r, r.dropOne).map!((t) => t[1]-t[0]);
You should r.save one or both of those. The dropOne may affect both instances if you don't .save. By the way, what's the point of `dropOne` over `drop(1)`? It's not shorter. Does it do anything subtly different?