fix(subscribeToResult): accept array-like as result

[mpodlasin]

Description:

Observable.from and operators using subscribeToResult both use interface ObservableInput for describing their input, so it follows that they should accept and work properly on the same kind of input.

And yet

Observable.from({0: 0, 1: 1, length: 2});

works as expected on array-likes, while

Observable.merge({0: 0, 1: 1, length: 2});

errors, saying that given argument is not proper observable.

Since array-likes belong to ObservableInput interface, I submit fix that makes operators using subscribeToResult work properly with array-likes.

[coveralls]

Coverage increased (+0.0003%) to 97.689% when pulling 14685ba on Podlas29:observable-input-as-array-like into 31dfc73 on ReactiveX:master.

[jayphelps]

Excellent find and code. I'd like another reviewer just to confirm.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.