regex dart
RegExp regExp = new RegExp(
r"/^WS{1,2}://d{1,3}.d{1,3}.d{1,3}.d{1,3}:56789/i",
caseSensitive: false,
multiLine: false,
);
print("allMatches : "+regExp.allMatches("WS://127.0.0.1:56789").toString());
print("firstMatch : "+regExp.firstMatch("WS://127.0.0.1:56789").toString());
print("hasMatch : "+regExp.hasMatch("WS://127.0.0.1:56789").toString());
print("stringMatch : "+regExp.stringMatch("WS://127.0.0.1:56789").toString());
allMatches : ()
firstMatch : null
hasMatch : false
stringMatch : null