Dating-life Memes

When Mom asks if you're bringing a girl home for Christmas and you're staring at ISBN barcode validation logic that looks like it was written by someone who gave up on life halfway through. The function checks if a code starts with "978" and throws an exception for "UPCs that might b..." – yeah, that error message got cut off just like your dating prospects. The real tragedy here? Someone is manually calculating ISBN-13 checksums with a for loop and modulo operations instead of using a library. That's the programming equivalent of being asked about your love life while you're debugging legacy code at 2 AM. Both situations scream "this wasn't our year" with equal intensity. Fun fact: ISBN-13 barcodes starting with 978 are book identifiers, which means this developer is probably more familiar with O'Reilly books than actual human interaction. Relatable content right there.