Bad Smells in Code

• Duplicate code If you see the same code structure in more than one place.

• Long Method The longer a procedure is, the more difficult it is to understand.

• Large Class When a class is trying to do too much.

• Long Parameter List Don't pass in everything the method needs; instead you pass enough so that the method can get to everything it needs.

• Divergent Change When one class is commonly changed in different ways for different reasons. (You likely have a situation in which two objects are better than one.)

Heads up! When you feel the need to write a comment, first try to refactor the code .so that any comment becomes superfluous.