var bla = (function() {

    function priv() {
        return 2;
    }

    // Public methods
    return {
        pub: function() {
            return priv();
        }
    }
})();

function Bla1() {
    priv = function() {
        return 2;
    }

    // Public methods
    this.pub = function () {
        return priv();
    }
}

var bla2 = {
    _priv: function() {
        return 2;
    },

    pub: function() {
        return this._priv();
    }
};

// Main gate
(function() {
    console.log(bla2.pub());
})()