var Poll = function(title, options) { this.title = title; this.options = options; this.counts = new Array(options.length); for(var i = 0; i < this.counts.length; i++) { this.counts[i] = 0; } this.votes = {}; } Poll.prototype.vote = function(ip, option) { if(!(ip in this.votes) || this.votes[ip] == null) { this.votes[ip] = option; this.counts[option]++; } console.log(this.votes); } Poll.prototype.unvote = function(ip) { console.log('unvote ' + ip + this.votes[ip]); if(ip in this.votes && this.votes[ip] != null) { this.counts[this.votes[ip]]--; this.votes[ip] = null; } console.log(this.votes); } Poll.prototype.packUpdate = function() { return { title: this.title, options: this.options, counts: this.counts } } exports.Poll = Poll;