[dalke]

Yes, the example problem doesn't match to promises.

I don't understand the "change the logger" comment. The example was the logger sends a message to the listener, which opens a database handle, which sends a message to the logger, and repeat. There's nothing to changing. I don't see how FRP helps eliminate that cycle.

[lmeyerov]

This might be what's happening, which would surface as no sensible declaration ordering:

//try making the logger first

var logger = require('myLogger')(backends);

var listener1 = require('mySync')(logger);

var backends = Rx.Observable.fromArray([listener1, listener2]);

//try making the backends first

var listener1 = require('mySync')(logger);

var backends = Rx.Observable.fromArray([listener1, listener2]);

var logger = require('myLogger')(backends);

From there, you'd switch to unsafe FRP methods (imperatively injecting into event streams, e.g., Subjects in Rx), which is the warning sign of weird cyclic behavior.