Writing Good Functions

Defaults, multiple return values, passing functions as arguments, and the reference semantics that make a function quietly change its caller's list.

Learning Objectives

• →Give a parameter a default and call it by name
• →Return several values as a tuple and unpack them
• →Pass a function to another function, including a lambda
• →Explain why modifying a list argument changes the caller's list
• →Use a guard clause to handle the empty case first
• →Build a function out of a smaller one instead of repeating a formula

Coding Problems (6)