#{ main <- { inset <- #["foo" "bar" "foobar" 1 2 3] notin <- #["baz" "qux" "bazqux" 4 5 6] myset <- sets hash foreach: inset :idx el { myset add: el } foreach: inset :idx el { if: (myset contains?: el) { print: "set contains " . el . "\n" } else: { print: "set doesn't contain " . el . "\n" } } foreach: notin :idx el { if: (myset contains?: el) { print: "set contains " . el . "\n" } else: { print: "set doesn't contain " . el . "\n" } } } }