lib/fsExt.js
function getExt(filename){
    var splitted = filename.split('.');
    if(splitted.length === 1) return ''; // file has no extension
    return splitted[splitted.length - 1]; // get file extension
}
function getExt(filename){
    var splitted = filename.split('.');
    if(splitted.length === 1) return ''; // file has no extension
    return splitted[splitted.length - 1]; // get file extension
}
helper - extract file extension from file name
@param {String} filename
@returns {String}  file extension