// generic function syntax (V-style type parameters)

// generic functions: type params are parsed but the VM handles types dynamically
fn first[T](arr) {
    return arr[0]
}

fn last[T](arr) {
    let n = len(arr)
    return arr[n - 1]
}

fn main() {
    // works with integers
    let nums = [10, 20, 30]
    println("first num: ${first[int](nums)}")
    println("last num: ${last[int](nums)}")
    
    // works with strings
    let words = ["hello", "world", "foo"]
    println("first word: ${first[string](words)}")
    println("last word: ${last[string](words)}")
    
    // type args are optional (VM is dynamically typed)
    println("first (no type arg): ${first(nums)}")
}