Task 3:

• Look at the first two variants of the orMap method (the recursively defined variant and the variant that uses the while loop. Identify the four parts (BASE-VALUE, Termination/Continuation PREDICATE, UPDATE, and ADVANCE) in each of them.

  Look also at the tests in the Examples class.

• After you understand how the while loop works, design two variants of the method that produces a new ArrayList that contains all elements of the original list that satisfy the given ISelect predicate.

  Test the methods by producing all red balloons or all small balloons.

• Design and test two variants of the andMap method that determines whether all elements of a given list satisfy the given ISelect predicate.

  Test the methods by checking whether a list contains all red balloons or all small balloons.

Converting while loops into for loops

If you have the time left, repeat all the parts of Task 3 with the remaining two variants of the orMap — namely the one that uses the for loop with the Traversal and the one that uses counted for loop.