Section 1: Smells within Classes

In Chapter 2, we'll take a brief look at the refactoring cycle. Chapter 3 is about measurable smells—those indicated by simple length metrics. Chapter 4 looks at how names contribute to the simplicity and comprehensibility of code. Chapter 5 considers the problem of unnecessary code.

The topic of Chapter 6—duplication—is, in many ways, the core smell we need to be sensitive to. Many of the other smells can be regarded as special cases of duplication.

Section 1 closes with Chapter 7, a look at conditional logic: how the expressions used by conditional and loop statements can be made more clear.