I m trying to compare 2 files with their exif date attribut: with this:

var ExifImage = require('exif').ExifImage;

function exify(name){
    var results
    new ExifImage({ image : name }, function (error, exifData) {
        if (error){
            console.log("error");
        }
        else {
            results = exifData.image.ModifyDate;
            console.log(results);
            return results;
        }
    });     
}


console.log(exify("IMG_0093.jpg"));

The console.log from the function is ok with a date but the function returns undefined not the value of results

Any idea