How to get the File Extension from a string Path

Question

I've got file path saved in variable and I want to get the file type extension by using path package https://pub.dev/packages/path So far I managed to do it by splitting the string like this

final path = "/some/path/to/file/file.dart";
print(path.split(".").last); //prints dart

Is there any way to achieve this with path package?

Answer 1

You can use the extension function in the path package to get the extension from a file path:

import 'package:path/path.dart' as p;

final path = '/some/path/to/file/file.dart';

final extension = p.extension(path); // '.dart'

If your file has multiple extensions, like file.dart.js, you can specify the optional level parameter:

final extension = p.extension('file.dart.js', 2); // '.dart.js'

Answer 2

No need of any extension. You can try below code snippet.

String getFileExtension(String fileName) {
try {
  return "." + fileName.split('.').last;
 } catch(e){
  return null;
 }
}