Request for feedback on combining multiple observables.

combine-observables.js

/**
 * This is the simplest way I could think of to consolidate multiple observables such that
 * (a) subscribers receive the latest value from *all* observables, (b) subscribers are notified
 * whenever *any* source observable is updated, and (c) new subscribers receive the most current
 * (consolidated) value. Still seems pretty complicated, so I feel like I must be missing something.
 */
var reporter = new ReplaySubject(1);
var foo = new ReplaySubject(1);
var bar = new ReplaySubject(1);
var all = Observable.combineLatest(foo, bar);

reporter.subscribe(console.log.bind(console));
all.subscribe(reporter.next.bind(reporter));

foo.next('foo');
bar.next('bar');
// Console: ['foo', 'bar']