unzip4

The unzip4 function takes a list of quadruples and returns four lists, analogous to unzip.
O(1) Unzip 4 vectors
O(1). Unzip an unboxed array.
Unzip four arrays
unzip4 takes a vector of quadruples and returns four vectors, analogous to unzip.
Like unzip, but works on a collection of 4-element tuples.
Unzip an infinite list of quadruples.
Unzip a non-empty vector of quadruples.