Discussion on: JavaScript Challenge #2

[Lanil Marasinghe]

let extensions = array.map(fileNames => {
    let fileNameParams = fileNames.split(".");
    let extension = fileNameParams[fileNameParams.length - 1];
    return extension === "" ? "null" : `.${extension}`;
});

console.log(extensions); // => [".txt",".zip","null",".exe"]