events/event_emitter2.js


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var events = require('events');
var util = require('util');

function MyEventEmitter() {
    if (false === (this instanceof MyEventEmitter))
        return new MyEventEmitter();

    /* inherit all prototype objects, methods, etc */
    events.EventEmitter.call(this); /* hmm this calls a ctor? notice it's not a method */
}
/* ensure that the prototype methods of the specified superCtor are inherited into ctor */
util.inherits(MyEventEmitter, events.EventEmitter);

MyEventEmitter.prototype.poke = function(msg) {
    this.emit('poke', 'poking ' + msg)
}

MyEventEmitter.prototype.yell = function(msg) {
    this.emit('poke', 'yelling at ' + msg)
}

var ee = new MyEventEmitter;

ee.on('poke', function(msg) {
    console.log(msg);
})
 .on('yell', function(msg) {
    console.log(msg);
});

ee.poke('kyle');
ee.yell('bro');