moduleIIFE.js

var myAwesomeModule = (function(members) {
    function change() {
        publicAPI.showMember = removeFalsy;
    }

    function getMembers() {
        console.log(members);
    }

    function removeFalsy() {
        var truthMember = members.filter(x => !!x);
        console.log(truthMember);
    }

    var publicApi = {
        showMember: getMembers,
        change: change
    };

    return publicAPI;
})(['', 1, 2, null, 4, undefined, 5])