The keyword here is 'on' method. *source.on* vs *sink.on*. On is
eventemitter method that listens to events emited on THAT object.
So if you emit stuff from source, attaching a listener to sink does not
help. It doesn't matter what kind of object your sink is - it did not emit
any radiation.
To make one object emit events and have others listen, you have two simple
routes. One is to get attached to *source* from all your listeners, or the
other is to use some kind of a bus or pubsub.
For the first version, your source would be an EventEmitter and it would
emit('radiation'). And your sink can be any other object (including an
event emiter), which has a listener.
Something like this:
var Sink = new (require("events").EventEmitter)() /* or whatever else */
Sink.radiationHandler = function(){
console.log('run to the hills!');
}
var sink = new Sink;
Then you attach that method as a listener to it, like this:
source.on('radiation', sink.radiationHandler);
The other method I've described is a pubsub, kind of like this:
https://gist.github.com/fatihacet/1290216
On Thursday, February 6, 2014 12:45:47 AM UTC+1, q2dg2b wrote:
>
> Hello friends
>
> I don't know why this code doesn't work:
>
> var source = new (require("events").EventEmitter)()
> var sink = new (require("events").EventEmitter)()
> setInterval(function() {source.emit("radiation")}, 1000)
> sink.on("radiation", function(){console.log("¡Detected!")})
>
> However, this code does work:
>
> var source = new (require("events").EventEmitter)()
> setInterval(function() {source.emit("radiation")}, 1000)
> source.on("radiation", function(){console.log("¡Detected!")})
>
> Isn't possible to emit an event by an object and to receive this event by
> another object, then?
>
> Thanks!!
>
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