extensions_methods_part_1.dart

/*
 * Dart & Flutter - Training
 * 
 * Copyright (c) Boris-Wilfried Nyasse
 * All rights reserved
 * 
*/

void main() {
  print(StringUtil.isValidName('Pizza'));
}

class StringUtil {
  // Helper or Utility Method
  static bool isValidName(String str) {
    return !str.contains(RegExp(r'[0–9]'));
  }
}