Multiple answers. Attachment and practice of sending unwanted messages
Robots can be used in fabrics where they now use them to help do the work faster and do somethings that humans cant do.
Answer:
(Assuming Java)
public ArrayList diff(ArrayList list1, ArrayList list2) {
ArrayList<Integer> union = new ArrayList<>();
for (int element : list1) {
union.add(element);
}
for (int element : list2){
if (!union.contains(element)) {
union.add(element);
}
}
return union;
}
Explanation:
Create an ArrayList that has the union of list1 and list2.
First for loop copies all elements into the union array list.
Second for loop adds all elements that are not yet in the union arraylist to the union arraylist.
(Keep in mind that I assume that you mean a mathematical union, so no duplicates. If this is not what you mean, remove the if statement in the second for loop)
Two of the three tables in his database should have foreign keys that link to primary keys in one of the other tables. That way he can join the tables together.
