| OPTIONAL | |
| SYNOPSIS | |
| mixed * intersect_alist (mixed * list1, mixed * list2) | |
| DESCRIPTION | |
| Does a fast set intersection on alist key vectors (NOT on full alists!). | |
| The operator '&' does set intersection on arrays in general. | |
| EXAMPLE | |
| new_list = intersect_alist(list1, list2); | |
| SEE ALSO | |
| filter(E), assoc(E), insert_alist(E), map(E), | |
| member_array(E), order_alist(E), sort_array(E), unique_array(E) |