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Clean Code
Clean Code
Adi Boboacă
@adibolb
Alex Bolboacă
@alexboly
Clean Code
Clean Code
Code is more often read than written
www.mozaicworks.com
Clean Code – Environment
Build Requires One Step
Build time is manageable
Tests Execution Requires One Step
Always Use Source Control
Have Continuous Integration
Code Smell
Sniffable
Easy to spot
Does not always indicate a problem
www.mozaicworks.com
Code Smell
A code smell is a hint that shows you
might have a problem in your system. '
www.mozaicworks.com
Coding Smells - Design
Misplaced Responsibility
Code at Wrong abstraction Level
Fields Define Temp Variables
Hidden Temporal Coupling
Over-engineering
Usage of Singleton / Statics / new
Interface Has Too Many Methods
Clean Code - Design
Be Precise
Don't Be Arbitrary
Keep Configuration at High Levels
Prefer Polymorphism Over conditionals
Prefer Composition Over Inheritance
S.O.L.I.D.
Coding Smells – Naming
There Are Several Naming Standards
More Names Mean The Same Concept
Someone Needs To Explain You The Code
Clean Code – Naming
Use Standards For The Language
Names Use Domain Language
Names Describe The Intention
Names Do Not Use Hungarian Notation
Names Do Not Contain Encodings
Coding Smells - Methods
Method Has More Than 3 Indents
Method Uses Getters From Other Classes
There Are Static Method
Methods & Ctors Have More Than 3 Args
Arguments Have out Or ref
Clean Code - Methods
Have Only One Responsibility
Use Only Internal State (No Feature Envy)
Avoid Static
Have Maximum Two Arguments
Do Not Pass Reference As Arguments
Coding Smells - Variables
You see a, i, bla, etc. As Variables
You see string, int, float, In Classes
There Are Static Variables In Classes
Use Integers for Currency
Clean Code - Variables
Use Explanatory Variables
Always Encapsulate Primitives
Avoid Statics
Use Appropriate Types
Clean Code - General
Boy Scout Rule
Keep It Simple, Stupid (KISS)
Delete Commented Code
Delete Unused Code
Minimize Duplication
Clean Code
http://www.mozaicworks.com
Extend your mentoring & training
capacity
Accelerate learning through
communities of practice
Grow your functional leaders and top
talents
@alexboly @adibolb
Clean Code
Q&A,
Beer
& More...
www.mozaicworks.com

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Clean Code @Agileworks Romania 2013 05 23

  • 4. Clean Code Code is more often read than written www.mozaicworks.com
  • 5. Clean Code – Environment Build Requires One Step Build time is manageable Tests Execution Requires One Step Always Use Source Control Have Continuous Integration
  • 6. Code Smell Sniffable Easy to spot Does not always indicate a problem www.mozaicworks.com
  • 7. Code Smell A code smell is a hint that shows you might have a problem in your system. ' www.mozaicworks.com
  • 8. Coding Smells - Design Misplaced Responsibility Code at Wrong abstraction Level Fields Define Temp Variables Hidden Temporal Coupling Over-engineering Usage of Singleton / Statics / new Interface Has Too Many Methods
  • 9. Clean Code - Design Be Precise Don't Be Arbitrary Keep Configuration at High Levels Prefer Polymorphism Over conditionals Prefer Composition Over Inheritance S.O.L.I.D.
  • 10. Coding Smells – Naming There Are Several Naming Standards More Names Mean The Same Concept Someone Needs To Explain You The Code
  • 11. Clean Code – Naming Use Standards For The Language Names Use Domain Language Names Describe The Intention Names Do Not Use Hungarian Notation Names Do Not Contain Encodings
  • 12. Coding Smells - Methods Method Has More Than 3 Indents Method Uses Getters From Other Classes There Are Static Method Methods & Ctors Have More Than 3 Args Arguments Have out Or ref
  • 13. Clean Code - Methods Have Only One Responsibility Use Only Internal State (No Feature Envy) Avoid Static Have Maximum Two Arguments Do Not Pass Reference As Arguments
  • 14. Coding Smells - Variables You see a, i, bla, etc. As Variables You see string, int, float, In Classes There Are Static Variables In Classes Use Integers for Currency
  • 15. Clean Code - Variables Use Explanatory Variables Always Encapsulate Primitives Avoid Statics Use Appropriate Types
  • 16. Clean Code - General Boy Scout Rule Keep It Simple, Stupid (KISS) Delete Commented Code Delete Unused Code Minimize Duplication
  • 17. Clean Code http://www.mozaicworks.com Extend your mentoring & training capacity Accelerate learning through communities of practice Grow your functional leaders and top talents @alexboly @adibolb