validatorLetter function
Implementation
bool validatorLetter(value) {
final RegExp re = RegExp(r'^[a-zA-Z]+$');
final bool matches = re.hasMatch(value);
return !matches;
}
bool validatorLetter(value) {
final RegExp re = RegExp(r'^[a-zA-Z]+$');
final bool matches = re.hasMatch(value);
return !matches;
}