Call only last defined function wrapper (Js)

CallOnceConstructor.js

var CallOnceConstructor = function () {
    var cache = {};
    return function (f) {
        if (cache.f_link) {cache.f_link.f = null};
        var f_link = {f: f};
        cache.f_link = f_link
        return function() {
            if (f_link.f) f_link.f.apply(null, arguments);
        };
    }
};

// example
// var call_last = CallOnceConstructor()
// var f1 = call_last(...)
// var f2 = call_last(...)
// var f3 = call_last(...)
// only f3 will be performed