# Code Smells


> 
– What? How can code "smell"??
– Well it doesn't have a nose... but it definitely can stink!

You must train yourself to recognize when these smells require attention, what are those smells and how to remove them.

## What is a code smell?

In computer programming, ***a code smell*** is any characteristic in the source code of a program that possibly indicates a deeper problem. The determination of code smell is subjective and depends on the language, developer, and development technology.

### Bloaters
> 
*Bloaters are code, methods, and classes that have increased to such proportions that they are hard to work with.*
- Long Method
- Large Class
- Primitive Obsession
- Long Parameter List
- Data Clumps

### Object orientation abusers
> 
*All these smells are incomplete or incorrect applications of object-oriented programming principles.*
- Switch Statements
- Temporary Field
- Refused Bequest
- Alternative Classes with Different Interfaces

### Change preventers
> 
*These smells mean that if you need to change something in one place in your code, you have to make many changes in other places too.*
- Divergent Change
- Shotgun Surgery
- Parallel Inheritance Hierarchies

### Dispensables
> 
*A dispensable is something pointless and unneeded whose absence would make the code cleaner, more efficient, and easier to understand.*
- Comments
- Duplicate Code
- Lazy class
- Data Class
- Dead Code
- Speculative Generality

### Couplers
> 
*All the smells in this group contribute to the excessive coupling between classes or show what happens if the coupling is replaced by excessive delegation.*
- Feature Envy
- Inappropriate Intimacy
- Message chains
- Middle Man
- Incomplete Library Class

If you would like to know more about code smells and how to fix them let me know.
In the meantime, I strongly recommend  [Refactoring Improving the Design of Existing Code by Martin Fowler, with Kent Beck](https://martinfowler.com/books/refactoring.html) or [Refactoring Guru](https://refactoring.guru/refactoring/smells).

Get in touch with me via [LinkedIn](https://www.linkedin.com/in/liutauraskav/)  in case you would like to talk more :)