JSON.stringify reflection

gistfile1.js

function StatNode() {
    this.dns = 0;
    this.connect = 0;
    this.first = 0;
    this.last = 0;
}

StatNode.prototype.setParam = function (param, value) {
    //...
};

StatNode.prototype.toJSON = function () {
    return JSON.stringify({
        dns : this.dns,
        connect : this.connect,
        first : this.first,
        last : this.last
    });
};

function Statistic() {
    this.stat = [];
}

Statistic.prototype.pushNode = function (statNode) {
    this.stat.push(statNode); 
};

Statistic.prototype.toJSON = function () {
    return JSON.stringify(this.stat);
};


var stat = new Statistic();
stat.pushNode(new StatNode());
stat.pushNode(new StatNode());
stat.pushNode(new StatNode());
stat.pushNode(new StatNode());

console.log(JSON.stringify(stat));