- flexvector-fold kons knil fv1 fv2 ...procedure
The fundamental flexvector iterator. kons is iterated over each value in all of the vectors, stopping at the end of the shortest; kons is applied as (kons state (flexvector-ref fv1 i) (flexvector-ref fv2 i) ...) where state is the current state value—the current state value begins with knil, and becomes whatever kons returned on the previous iteration—and i is the current index. The iteration of flexvector-fold is strictly left-to-right. The iteration of flexvector-fold-right is strictly right-to-left.