24.重构

Reasons to refactor:

1. code is duplicated;
2. A routine is too long; A routine has a poor name;
3. A loop is too long or too deeply nested;
4. A class has poor cohesion; A class interface does not provide a consistent level of abstraction; One class is overly intimate with another;
5. A parameter list has too many parameters;
6. Data members are public;
7. Global variables are used;

---

Refactorings:

1. Data-level refactoring;
2. statement-level refactoring;
3. routine-level refactoring;
4. class implementation refactoring;
5. class interface refactoring;
6. system-level refactoring.

---

TIPS:

• replace a magic number with a named constant;
• rename a variable with a clearer or more informative name;
• replace an expression with a routine;
• convert a multi-use variable to multiple single-use variables;
• replace a traditional record with a data class;
• change value objects to reference objects;
• create a definitive reference source for data you can't control;
• provide a factory method rather than a simple constructor.

标签：24,重构,level,replace,refactoring,too,routine,class
来源： https://blog.csdn.net/qq_40732962/article/details/112061983