js getter and setter

// Getter and setter
var TEST = (function(exposed) {
    // Underbar method
    var User = exposed.User = function() {
        this._name = 'teste'; // readonly
    }

    User.prototype = (function() {
        function private() {
            this._name = 'im private';
        }
        return {
            get name() { return this._name },
            changeName: function () {
                private.call(this);
            }
        }
    })();


    // __define*etter__ method
    var Person = exposed.Person = function() {
        var name = 'Person';

        this.__defineGetter__("name", function() {
            return name;
        });

        this.__defineSetter__("name", function(val) {
            name = val;
        });
    }

    return exposed;
})(TEST || {});

(function() {
    var a = new TEST.User();
    var b = new TEST.User();
    console.info('a.name ' + a.name);
    console.info('b.name ' + b.name);
    b.changeName();
    console.info('a.name ' + a.name);
    console.info('b.name ' + b.name);
    // b.name = 'test'; // wont work!
    console.info('---');

    var c = new TEST.Person();
    var d = new TEST.Person();
    console.info('d.name ' + c.name);
    console.info('d.name ' + d.name);
    d.name = 'test';
    console.info('c.name ' + c.name);
    console.info('d.name ' + d.name);
})();

// Benchmarks about getter and setter
// http://united-coders.com/christian-harms/javascript-object-property-getter-benchmarks-part-2
// http://united-coders.com/christian-harms/javascript-object-access-micro-benchmarks