It was the worst mistake of my coding career. The boss called me into the office. He said "Hillel, did you commit this code?" It was my first job after college. I knew all the patterns, the big O notation, the UMLs. I knew my SOLID and my clean code. I knew I wrote good software The boss was angry. He said "take a close look at what you did". And I saw my mistake. I had forgotten to ask for code review, which means nobody noticed these lines of code: ``` user = UserFactory.createUser(); user.add_to_group(group); 𓄂𓂝𓅓𓂋𓏤𓈓𓏌𓏤𓉐𓂋𓏏𓂻𓅓𓉔𓂋𓇳𓅱𓏤𓊃𓎀𓊃𓍞𓀁𓈓𓊃𓅜𓐍𓏲 𓀁𓈓𓉐𓂋𓂻𓉔𓄿𓇋𓏏𓇋𓂻𓅓𓊻𓅜𓐍𓏏𓏝𓈓𓐝𓋀𓏏𓏏𓈉𓄤𓆑𓂋𓏏𓏝𓆓𓂧𓏏𓈓 ``` I had accidentally committed the entire Egyptian Book of the Dead! We tried to roll it back, but it was too late. Anubis had risen from the underworld to weigh our codebase against his feather. Our codebase was too sinful (no GDPR-compliance) and so the crocodile goddess Ammut devoured the souls of all 1,000 of our production servers. I paid dearly for this mistake. I had to buy the devops team donuts for a whole month. And those donuts taught me a lesson I would never forget: always get a code review before committing, even if you use SOLID and clean code. Because the real world is not school. In the real world, Anubis is real.