JavaScript Callback and return issue [duplicate]

This question already has an answer here:

• How do I return the response from an asynchronous call? 16 answers

I'm trying to return a value through different functions but it dosn't work for me. I think I have some trouble with callbacks and return in functions and I hope you guys can tell my mistake is.

My code are:

server.js

var tmdb = require('./tmdb')();
var result = tmdb.searchMovie("Alien", 1979, "de", false); 
console.log(result);

tmdb.js

module.exports = function(){

var Tmdb = function() {};

 Tmdb.prototype.searchMovie = function(title, year, lang, includeAdult) {        

    ...

    movieResult = sendRequest(function(resultCallback){
        return result;
    }); 

    return movieResult;
 };

 return new Tmdb();
}


function sendRequest(resultCallback){

var req = https.request(options, function(res) {

    var chunks = [];

    res.on('data', function (chunk) {
        chunks.push(chunk);
    });

    res.on('end', function(){
        var resultBody = Buffer.concat(chunks);
        resultCallback(JSON.parse(resultBody.toString()));
    });

});

req.write("{}");
req.end();

}

Why do I get a "undefined" on console.log(result);?

I think the problem is the async function calls but how can I return my object here?

via Kumaro