type Helpers {
    func repeat 0 _ = unit
    func repeat n x = x : repeat (n - 1) x

    func twice x = repeat 2 x
    func thrice x = repeat 3 x

    proc printEach!(iterable) {
        for item in iterable {
            println!(item)
        }
    }

    export twice, thrice, printEach
}

proc main!() {
    let numbers = [1, 2, 3, 4, 5]
    Helpers::printEach!(map Helpers::twice numbers)
    Helpers::printEach!(map helpers::thrice numbers)
}