getNumbersFromString function
getNumbersFromString method this method will return all the digits from string passed
Implementation
String? getNumbersFromString({String? stringToExtract}) {
if (stringToExtract == null) {
return 'String passed cannot be null';
}
if (stringToExtract.isEmpty) {
return 'String passed cannot be empty';
}
const Pattern pattern = r'\d+';
final RegExp regex = RegExp(pattern as String);
return regex.stringMatch(stringToExtract);
}