Tim Cooper was digging through the code for a trip-planning application. This particular application can plan a trip across multiple modes of transportation, from public transit to private modes, like rentable scooters or bike-shares.

This need to discuss private modes of transportation can lead to some… interesting code.

// for private: better = same
TIntSet myPrivates = getPrivateTransportSignatures(true);
TIntSet othersPrivates = other.getPrivateTransportSignatures(true);
if (myPrivates.size() != othersPrivates.size()
        || ! myPrivates.containsAll(othersPrivates)
        || ! othersPrivates.containsAll(myPrivates)) {
    return false;
}

This block of code seems to worry a lot about the details of othersPrivates, which frankly is a bad look. Mind your own business, code. Mind your own business.

https://thedailywtf.com/articles/a-private-matter