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D.14.2.1 intersectLists

Procedure from library combinat.lib (see combinat_lib).

Usage:
intersectLists(L,M); L list, M list

Return:
list, containing all elements of L which are elements of M

Theory:
we require the elements of the lists to have a compare operator ==.

Example:
 
LIB "combinat.lib";
intersectLists(list(1,1,2,2,3),list(2,3,3,4));
==> [1]:
==>    2
==> [2]:
==>    3
intersectLists(list(1,1,2,2,3),list(1,1,2,2,3));
==> [1]:
==>    1
==> [2]:
==>    2
==> [3]:
==>    3


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