Syntax
difference(list1, list2, …)
Description
The difference() function returns an array with all elements of list1 that are not in any of the lists list2…listn. If list1 is the NULL list, the result is the NULL list.
Duplicates are allowed in list1, and they appear in the return list in same order and number as they appeared in list1
Example
list1 = [1,2,3,4,5,6,7];
list2 = [3,4,5];
list3 = [4,5,6];
unique1 = difference(list1,list2,list3);
print("Elements unique to list1 : ",unique1);
Elements unique to list1 : [1, 2, 7]