Code Cleanliness

and

Business Impact

(30mins)

There really is a problem

and

here's how bad it is

We all agree that this stuff is important

But how important?

Sorry for the interruption

Code that Interrupts

When you hit Careless Code

you hit a Diversion

BUT the meter is running

CME Group pays while we follow that diversion

What’s the return on investment?

New knowledge?

Sort of...

“They're not code, they're not features, they are

puzzles”

a Tim Cooke rant

Puzzles Are Cheap + Easy to create

Cheap code up-front ==

Expensive maintenance + enhancement

So what?

Isn’t that what programming is?

Cumulative complexity

Production incident

So Why Do We Do It?

Functionally it works!

Coding at School

Reckless acts of heroics

Coding at School

vs

Coding at Work

Enterprise apps

have

non-functional

requirements

When non-functionals

go wrong

Seems Forgivable

Usually

Later == Never

One more Broken Window

Feeling the pressure?

We Can Do Better

Are you making things better?

or

Are you making things worse?

Boy Scout Rule

"Check it in better than you found it"

What should Sideshow Bob do?

Put the rakes

away?Leave them?

Invest in the future?

or

Borrow from the future?

PMP Goal

"Learn all the quirks and nuances of

application codebase."

Winner: Most Unlikely PMP Goal Ever award

Build teams of

Software Engineers

not

Application Developers

Most important way to achieve

this is to Try

Don't be afraid of your code

Recognise that certain non-

functionals need investment

Integrate that investment into

normal day-to-day work

Clean Coding Practices

Future technical sessions planned

December training - "Clean Code" by Instil

Clean Code: Functions/Methods

Small

Do one thing, Do it well, Do it only

One level of abstraction per function

Don't Repeat Yourself / Remove Duplication

Clean Code: Comments

Explain yourself in code

Good/Bad/Redundant comments

"Don't comment bad code, rewrite it" - Brian Kernighan

Comments don't make up for bad code

Clean Code: Meaningful Names

Avoid disinformation

Make meaningful distinctions

Avoid mental mappings

Use intention revealing names