Refactoring – simple word which all of you already heard about it - Do Minh Tuan

RefactoringA simple word which all of you already heard about

–Do Minh Tuan

I’m Tuan• Live in Da Nang.

• Working in Axon Active Vietnam.

• Scrum Master, Team Leader, Software Engineer.

• Java, Javascript, Code Generator.

tuan.do@axonactive.vn

Story

–Martin Fowler

“a change made to the internal structure of software to make it easier to understand and cheaper to modify without changing its observable behavior.”

What is Refactoring ?

ADDING FUNCTION REFACTORING

you can only wear one hat at a time

Why should you refactor ?

Improve your software design

Easier to understand

Future Developer

Save your energy

Finding bugs

Programming faster

Video

When do you refactor ?

–Don Roberts

“The first time you do something, you just do it. The second time you do something similar, you wince at the duplication, but you do the duplicate thing anyway. The third time you do something similar, you refactor”

Adding function

Fixing bugs

Coding review

“If it stinks, change it”

Long Method

Large Class

Long Parameter List

Divergent Change

Shotgun Surgery

Data Clumps

Feature Envy

Primitive Obsession

Switch Statements

Parallel Inheritance HierarchiesSpeculative Generality

Temporary Field

Message Chains

Middle manInappropriate IntimacyIncomplete Library Class

Data ClassRefuse Bequest

Comment

Duplicated Code

Demo

–Kent Beck

“I’m not a great programmer, I’m just a good programmer with great habits.”

tuan.do@axonactive.vn

https://vn.linkedin.com/in/dominhtuan

Thank you !