posted 6 years ago
There's that old joke about a company who's widget broke. The tried and tried to fix it and couldn't. Finally, the called their old, retired engineer. Begged him to come back and take a look, and said they'd pay him anything he asked.
He came back, looked at something for five minutes, put an X on a piece and said "This is what's broken and needs replaced. That will be $10,000".
The company asked for an itemized bill to justify such a large cost for such little time. The bill came in:
There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors