zip4 package:massiv
unzip4 :: (Index ix, Source r (e1, e2, e3, e4)) => Array r ix (e1, e2, e3, e4) -> (Array D ix e1, Array D ix e2, Array D ix e3, Array D ix e4) Unzip four arrays
Zip four vectors together into a vector. The length of a resulting
vector will be the smallest length of the supplied vectors.