getPortNumber static method

int? getPortNumber(
  1. String value
)

check if the string is a port number

Implementation

static int? getPortNumber(String value) {
  int? port = int.tryParse(value, radix: 10);
  if (port == null || port < 0 || port > 65535) {
    return null;
  }

  return port;
}