Revealing module pattern with instance variables

revealing-module-pattern.html

var mymodule = (function() {
    function init() {
        this.first = undefined;
        this.second = 'blah';
        this.third = [];
    }

    var getFirst = function(){
        console.log(this.first);
    };

    var getSecond = function(){
        console.log(this.second);
    };

    var getThird = function(){
        console.log(this.third);
    };

    return {
        first: null,
        second: null,
        third: null,
        init: init,
        getFirst: getFirst,
        getSecond: getSecond,
        getThird: getThird
    }
})();