validateVector function

String? validateVector(
  1. String? value
)

Implementation

String? validateVector(String? value) {
  if (value == null || value.isEmpty) return 'Cannot be empty';

  List<String> values = value.split(RegExp(r',\s*'));
  for (var val in values) {
    if (int.tryParse(val) == null) {
      return 'Invalid number';
    }
  }

  return null;
}