Allow unsubscribe with message, or message + token/function about pubsubjs HOT 5 CLOSED

This is actually the most common practice in most pubsub implementations

Could you give examples of this?

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Well, maybe I over did it, but to name a few that do follow this pattern:

Stapes

http://hay.github.io/stapes/#m-events

Backbone

http://backbonejs.org/#Events-off

jQuery

http://api.jquery.com/off/

EventEmitter

https://github.com/Wolfy87/EventEmitter/blob/master/docs/api.md#removelisteners

Minievents

https://github.com/allouis/minivents

RadioJS

http://radio.uxder.com/documentation.html

Shotgun

https://github.com/jgnewman/shotgun#unsubscribing

Also note that DOM events and Node.js events follow slightly similar pattern of first param being event type, and the second being the handler.
I think that in pub/sub implementations, allowing to send only the type argument is quite handy.

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Just to be clear, of all the listed examples, only RadioJS is a publish/subscribe implementation, the rest are implementations of the Observer pattern.

Addy Osmani explains the differences between the two patterns in his excellent book Learning JavaScript Design Patterns

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Pull request #62 will implement a clearSubscriptions method that will do what you request

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@mroderick thanks for note! And good to see this getting in (:

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