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. The function is available only if the driver is compiled with alist support. In that case, __ALISTS__ is defined. EXAMPLE new_list = intersect_alist(list1, list2); HISTORY LDMud 3.3 made this an optional efun. SEE ALSO filter_array(E), assoc(E), insert_alist(E), map_array(E), member_array(E), order_alist(E), sort_array(E), unique_array(E)