ListSet #

Why does ListSet::remove have that given line? #

As mentioned in the comment, the reason that we need the line is out of scope. Specifically, the List interface has two remove methods:

• remove(int index), that removes an element at a specific index
• remove(Object elem), that removes a specific thing from the list

We would like to use the latter, so we must “autobox” the given int to Integer with the given assignment statement.

BooleanSet #

Do we have to handle inputs outside [0, maxElem] (inclusive)? #

No.