b = [1, 5, 2, 6, 6, 2, 2, 1, 9, 8, 6, 5]

// One way, using OrderedList.  An OrderedList is a type of array that keeps
// its elements in order.  The items must be comparable.
a = new OrderedList
println[a.insertAllUnique[b]]

// Another way, using the "set" datatype and back to an array.
println[toArray[toSet[b]]