Util classes are great to gather protocol

TL;DR: Don't add an accidental protocol to your classes

Problems

Readability
Single Responsibility Violation
Bad Cohesion
High Coupling
Low Reusability

Solutions

Break your class
Extract Class

Related Refactorings

Refactoring 007 - Extract Class

Maxi Contieri ・ Jul 4 '22

#webdev #beginners #javascript #tutorial

Context

We tend to put a protocol in the first class we find.

That's not a problem.

We just need to refactor.

Sample Code

Wrong

public class MyHelperClass {
  public void print() { }
  public void format() { }
  // ... many methods more

  // ... even more methods 
  public void persist() { }
  public void solveFermiParadox() { }      
}

Right

public class Printer {
  public void print() { }
}

public class DateToStringFormater {
  public void format() { }
}

public class Database {
  public void persist() { }
}

public class RadioTelescope {
  public void solveFermiParadox() { }
}

Detection

[X] Automatic

Most linters count methods and warn us.

Relations

Code Smell 124 - Divergent Change

Maxi Contieri ・ Mar 24 '22

Code Smell 143 - Data Clumps

Maxi Contieri ・ Jun 22 '22

#webdev #javascript #beginners #programming

Code Smell 90 - Implementative Callback Events

Maxi Contieri ・ Oct 7 '21

#javascript #webdev #beginners #tutorial

Code Smell 22 - Helpers

Maxi Contieri ・ Nov 12 '20

#oop #helpers #codenewbie #beginners

Code Smell 34 - Too Many Attributes

Maxi Contieri ・ Nov 25 '20

#oop #codenewbie #programming

More info

Refactoring Guru

Conclusion

Splitting classes and protocol is a good practice to favor small and reusable objects.

Credits

Photo by Marcin Simonides on Unsplash

There is no code so big, twisted, or complex that maintenance can't make it worse.

Gerald M. Weinberg

Software Engineering Great Quotes

Maxi Contieri ・ Dec 28 '20

#codenewbie #programming #quotes #software

This article is part of the CodeSmell Series.

How to Find the Stinky parts of your Code

Maxi Contieri ・ May 21 '21

#codenewbie #tutorial #codequality #beginners

Code Smell 147 - Too Many Methods