SetExample

import church.util.HashSet;

void: main(String[]: args) = {
    a = {1, 2, 3, 2, 1};
    output << a << "\n";
    assert a.size == 3;
    assert a.contains(1);
    b = {"foo", "bar", "baz", "basil", "basel"};
    assert b.size == 5;
    output << b << "\n";
}