How to bridge to zmq?

[symjie]

In the document,support bridge to zmq, Could you give me a example to brigde to zmq? I want to konw the zmq how to write!
The URL "https://github.com/mcollina/ascoltatori/blob/master/lib/zeromq_ascoltatore.js#L81-L129" ,I readed.but I can't understand the code ,I hope you to helpe me,because I am studying ZMQ;