intersect3(1tcl)

intersect3 -- return the logical intersection of two lists and exceptions

Synopsis

intersect3 lista listb

Description

Intersects two lists, returning a list containing three lists: the first list returned is everything in lista that was not in listb. The second list contains the intersection of the two lists, and the third list contains all the elements that were in listb but were not in lista. The returned lists will be sorted.