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中哪些可觀察觸發器發生變化我可以使用Rx.Observable.combineLatest,以便在任何可觀察的變化時通知變化。但我怎麼知道哪些可觀察到的變化?如何知道在Rx.Observable.combineLatest
var s1 = someObservable1();
var s2 = someObservable2();
Rx.Observable.combineLatest(s1, s2).subscribe(function(){
// How to know which Observable triggers combineLatest change
});