Currying

This can be done by using lazy methods:

var adder = 1.method(:add)
say adder(3)                 #=> 4

Or by using a generic curry function:

func curry(f, *args1) {
    func (*args2) {
        f(args1..., args2...)
    }
}

func add(a, b) {
    a + b
}

var adder = curry(add, 1)
say adder(3)                 #=>4