Design Patterns · Junior · Question 74 of 75

What does the Principle of Least Astonishment say?

✓Correct answer: Code and interfaces should behave the way users and readers most likely expect
2Avoid any surprises by writing no comments
3Users should never see errors

Explanation

A function getUser() shouldn't also send emails; a "Cancel" button shouldn't save. Surprises cause bugs.

Further reading

Wikipedia: Principle of least astonishment ↗

Test yourself

Take the Design Patterns · Junior quiz: questions and options are shuffled, and you get a review of your mistakes at the end.