1. Customer wants X.
2. Developer delivers X.
3. Customer wants developer to change X to Y for free.
4. Developer demands money.
5. Customer gets mad.
6. Developer compares situation to ordering a hamburger, consuming it, and demanding a pizza for free because customer didn't like the hamburger.
7. Customer pays

Coworker's whiteboard today

"Knock Knock"

"Who's there?" 

"Knock Knock"

"Who's there?" 

"Knock Knock"

"Who's there?" 

- DoS Attack

Choose wisely.

How to catch a GNU/Linux user! 😎

IF LIVES DEPEND ON A SYSTEM

1. Code review, collaboration, and knowledge sharing (each hour of code review saves 33 hours of maintenance)

2. TDD (40% — 80% reduction in production bug density)

3. Daily continuous integration (large code merges are a major source of bugs)

4. Minimize developer interruptions (an interrupted task takes twice as long and contains twice as many defects)

5. Linting (catches many typo and undefined variable bugs that static types could catch, as well as a host of stylistic issues that correlate with bug creation, such as accidentally assigning when you meant to compare)

6. Reduce complexity & improve modularity  -- complex code is harder to understand, test, and maintain

-Eric Elliott