Code Refactoring

What is "refactoring"?

What it's not

Refactoring is not optimization or re-writing

Why Bother?

“ANY FOOL CAN WRITE CODE THAT A COMPUTER CAN UNDERSTAND. GOOD PROGRAMMERS WRITE CODE THAT HUMANS CAN UNDERSTAND.” 

Martin Fowler

When?

Refactoring can and should be folded in to how you write and maintain code – a part of the everyday discipline of development, like writing tests and reviewing code. It should be done quietly, continuously and implicitly. It becomes part of the cost of doing work, folded in to estimates and risk assessments. Done properly, it doesn’t need to be explained or justified.

Jim Bird

Code smell

Blob Code*

Duplicate code

COMBINITORIAL Explosion

over / under expansion*

Long method

uncommunicative names

“Good code is its own best documentation. As you’re about to add a comment, ask yourself, ‘How can I improve the code so that this comment isn’t needed?’”

Steve McConnell

“Self documenting code is a myth perpetuated by people who hate to write documentation”

Nicholas Zakas

comments

Dead Code

speculative code

Graffiti code*

crossing streams*

other types

sources

In closing...

“You are not revolutionizing your app; rather you are evolutionizing your app... and evolution is an incremental, slow-paced intelligently-designed process (pun intended).”

Volkan Özçelik

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

Kent Bock

thanks!