Code Quality@kosalanuwan

get some paper, put it in a typewriter,type FADE IN ... and keep typing

- Peter Falk told to Paul Reiser

A computer program is the most complicated thing on

earth, second to a woman's brain

- Marvin Silva

PRE DEMO: What it looks like

Maybe it breaks down. Maybe a better program is

createdto replace it - happens all the

time- The Oracle told to Neo

Why do you have to care? - Understandability- Readability- Changeability- Extensibility- Maintainability

The costs: - Respond to change- Cost of change- Technical debt

How do you write bad code? - Rigid- Fragile- Immobility- Design debt : Technical debt by taking shortcuts?

- Environment debt : Technical debt by not running build, test, and other tasks

- Needless complexity- Needless repetition- Opacity

I know it when I see it!- KP told to The Wife

My gut says it’s clean, so I believe it

- KP

When you are matured with these principles and patterns it will become difficult for you to think without those

- KP

Where to begin?

- Good IDE- Static analysis tools- Builds- Test automation tools- Source control- Continuous integration

DEMO: Code Analysis

How to practice? - Code kata- Pair programming- Design/Code reviews- Peer reviews

Other things that go with it? - KISS- Boy scout rule- Root cause analysis- Following standard conventions- Class design principles

What can you do TODAY? - Naming conventions- Methods- Design principles- Dependency injection- Encapsulate conditionals- Polymorphism to If/Else or

Switch/Case- Exception over return codes

DEMO: Standard naming conventions

DEMO: Methods

DEMO: Query from command

DEMO: DRY up yourself

DEMO: Dependency injection by hand

DEMO: Encapsulate various things

DEMO: Polymorphics

DEMO: Replacing errors and exceptions

Do you swear to write software, the whole software and nothing but well-crafted

softwareso help you God!

- The Software Craftsmanship Oath

Happy Coding @kosalanuwan

http://kosalanuwan.tumblr.com/

Code Kata: - Reverse my array- Fizz Buzz

New requirements: - Optimize, don’t use any other

arrays