add possibility to filter listen event on server

[Vitaliy-Yarovuy]

some thing like that:

socket.on('my/todos updated', { ids:[1,2,3], maxLenght: 200 }, function(todo) {
    console.log('Got an updated Todo!', todo);
});

[Vitaliy-Yarovuy]

and can you look issues that closed, but I have add some additional comment
#31

[daffl]

Yes, I've been thinking about how to do this properly, too. Debating of adding an event dispatching mechanism where you can decide if the event + object combination should be sent to a connected client.

[daffl]

Following up on it here: #44 (comment)

[daffl]

Pull requests #50 and #51 add this filter functionality and should land in a release probably some time next week.

[lock]

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