Replace Exception with Precheck

How do I access the web edition?

double getValueForPeriod (int periodNumber) {
  try {
    return values[periodNumber];
  } catch (ArrayIndexOutOfBoundsException e) {
    return 0;
  }
}

double getValueForPeriod (int periodNumber) {
  return (periodNumber >= values.length) ? 0 : values[periodNumber];
}

aliases Replace Exception with Test