fileExt method

String fileExt(
  1. String? file
)

File extension

Implementation

String fileExt(String? file) {
  if (file == null || file.isEmpty) {
    return '';
  }
  file = file.trim();
  String ext;
  if (file.lastIndexOf('.') < 0) {
    ext = '';
  } else {
    ext = file.split('.').last;
  }
  return ext;
}