RxJS with combineLatest and zip N parameters

rx-js-multiples.js

// Combine Latest
var obs1 = Rx.Observable.returnValue(1),
    obs2 = Rx.Observable.returnValue(2),
    obs3 = Rx.Observable.returnValue(3);

// From Observable with splat
Rx.Observable.combineLatest(obs1, obs2, obs3, function(o1, o2, o3) {
    return o1 + o2 + o3;
}).subscribe(function(result) {
    console.log(result); // 6
});

// From Observable with Array
Rx.Observable.combineLatest([obs1, obs2, obs3], function(o1, o2, o3) {
    return o1 + o2 + o3;
}).subscribe(function(result) {
    console.log(result); // 6
});

// From prototype with splat
obs1.combineLatest(obs2, obs3, function(o1, o2, o3) {
    return o1 + o2 + o3;
}).subscribe(function(result) {
    console.log(result); // 6
});

// From prototype with Array
obs1.combineLatest([obs2, obs3], function(o1, o2, o3) {
    return o1 + o2 + o3;
}).subscribe(function(result) {
    console.log(result); // 6
});

// Zip
var obsA = Rx.Observable.fromArray([1,2,3]),
    obsB = Rx.Observable.fromArray([4,5,6]),
    obsC = Rx.Observable.fromArray([7,8,9]);

// From Observable with splat
Rx.Observable.zip(obsA, obsB, obsC, function(a, b, c) {
    return a + b + c;
}).subscribe(function(result) {
    console.log(result); // 11, 15, 18
});

// From Observable with Array
Rx.Observable.zip([obsA, obsB, obsC], function(a, b, c) {
    return a + b + c;
}).subscribe(function(result) {
    console.log(result); // 11, 15, 18
});

// From Observable with splat and no projection
Rx.Observable.zip(obsA, obsB, obsC).subscribe(function(res) {
    console.log(res.length); // 3, 3, 3
});

// From Observable with Array and no projection
Rx.Observable.zip([obsA, obsB, obsC]).subscribe(function(res) {
    console.log(res.length); // 3, 3, 3
});

// From prototype with splat
obsA.zip(obsB, obsC, function(a, b, c) {
    return a + b + c;
}).subscribe(function(result) {
    console.log(result); // 11, 15, 18
});

// From prototype with splat and no projection
obsA.zip(obsB, obsC).subscribe(function(res) {
    console.log(res.length); // 3, 3, 3
});

Rx.Observable.combineLatest doesn't exist... and yet, it should. Why have you forsaken me? :)
Rx.Observable.prototype.combineLatest is no substitute. :)