gistfile1.txt

var UpdatePull = function() {
  events.EventEmitter.call(this);
}

util.inherits(UpdatePull, events.EventEmitter);

UpdatePull.prototype.pull = function() {
    var self = this;
    this.rsspull(function(result){
        _.each(result, (function(item){
            console.log(item.hash);
            console.log(rssfeed_backlog.item);
            var findeditem = _.findWhere(rssfeed_backlog, {hash: item.hash});
            if(typeof findeditem == "undefined") {
                rssfeed_backlog.push(item);
                self.emit("articles", item);
		//dontwork TypeError: Cannot call method 'emit' of undefined
            }
            console.log(_.findWhere(rssfeed_backlog, {hash: item.md5}));
        }).bind(this));
    } , 10);
    var data = ["data1", "data2"];
    self.emit("articles", data);
}

var updatePull = new UpdatePull();
updatePull.pull()