Lecture 8

Question 1

What is refactoring?

Answer 1

Process of altering source code so as to leave its functionality unchanged

Question 2

Why refactor?

Answer 2

Improve maintainability, reusability, legibility, extensibility

Question 3

What are code smells?

Answer 3

an indication that there may be a deeper problem or design flaw in your code

not technically a bug, but if “left untreated” may lead to bugs later

Question 4

What are code smells examples?

Answer 4

Duplicated code

Method too big

Classes have too many instance variables

Subclasses very similar

Classes with too much code: God Class or Blob anti pattern

Shotgun Surgery: change something, you have to make lots of other little changes throughout the code