There are only 2 hard problems in computer science:
1. Naming things
2. Memori^H^Hdamn it^H^H^H^H^H^H^Hization.
P.S. I see what you did there. You botched your cache invalidation, and so lost the answer.
1. Naming things
2. Memori^H^Hdamn it^H^H^H^H^H^H^Hization.
P.S. I see what you did there. You botched your cache invalidation, and so lost the answer.