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Writing code

yo#

wo$

!

hat%

tomorrow.

Rafael Dohms

@rdohms

photo: djandyw.com

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Let me

introduceyou to

someone

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No Tests.

Wrote his own framework.

500 line methods.

Used Singletons!

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REWRITEALL THE CODE!

h t Gl L Ph t k

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Real Developers,SHIP STUFF.

photo: Glyn Lowe Photoworks

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photo: Kalexanderson

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How do we findbalance?

photo: Kalexanderson

photo: CarbonNYC

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Code has an

expiration date

photo: CarbonNYC

photoby: massdistraction

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Code is

perishable, it rots.

photo by: massdistraction

photo by: kevin dooley

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Code Evolves

photo by: kevin dooley

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Languages evolve.

photo by: raneko

photo by: Kaptain Kobold

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p y p

photo: osbornb

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Complexity

kills

Comprehension photo: miskan

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Bad Design

p

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Bad specs

photo by: John 'K'

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NIH

source: Urban dictionary

photo by: John K

photo by: John 'K'

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NIH| n"t #n$vent#d h#%|

Not Invented HereThe German art of humiliating any technology,

agricultural product, or (medical) scientific work that has not been

invented or produced in Germany, Switzerland, or Austria.source: Urban dictionary

photo by: John K

photo: Ian Sane

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The Solution

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Improve code

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Improve code

make it easier to comprehend

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Improve code

make it easier to comprehend

make it flexible

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Improve code

make it easier to comprehend

make it flexible

make it tested

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Improve code

make it easier to comprehend

make it flexible

make it tested

make it easier to replace, refactor

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Improve code

make it easier to comprehend

make it flexible

make it tested

make it easier to replace, refactor

make it not exist

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Good DesignConcepts

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SOLIDSingle ResponsibilityOpen/close

Liskov substitutionInterface segregation

Dependency inversion

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STUPIDSingleton

Tight CouplingUntestabilityPremature OptimizationIndescriptive Naming

Duplication

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Composer

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PIEProudly

InventedElsewhere

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guzzle/guzzleHTTP client for RESTful API clients

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morrisonlevi/ardentA library of collections for PHP

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Readability

photo: Morgenland

photo: Trossachs Photography

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paragraphs

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whitespace

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R&D Team for MIH/Naspers

So PauloCape Town

Obj

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Object

Calisthenics

photo by: boston_public_library

photo by: boston_public_library

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Calisthenics/&kal%s$THeniks/

Calisthenics are a form of dynamic exerciseconsisting of a variety of

simple, often rhythmical, movements, generally using minimal

equipment or apparatus.

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Its about perception,

not rules or standards photo by: david_a_l

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Sunday 12:00Voyager Room

photo by: justinliew

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#1Only one

indentation level

per method photo by: justinliew

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#2

Do notuse else

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photo by: justinliew

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#3Wrap primitive

types, if they

contain behavior photo by: justinliew

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#4

Only one->per line

photo by: justinliew

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#5

Do notabbreviate.

photo by: justinliew

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#6

Keep yourclasses small.

photo by: justinliew

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#7Limityour

instance variablesto less then 5

photo by: justinliew

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#8

Use first classcollections

photo by: justinliew

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#9

Usegettersand setters.

photo by: justinliew

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#10

Documentyour code.

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Improveyourself!

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Read lots ofcode!

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Write simplecode.

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Try Object Calisthenicsfor a month.

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Use someoneelses code.

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Share bite sizelibraries.

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Thank you.

http://slides.doh.ms

http://doh.ms

@rdohms

Video recording Resources on

http://slides.doh.ms/http://slides.doh.ms/http://l.doh.ms/1nxaWCshttp://l.doh.ms/1nxaWCshttp://l.doh.ms/1nxaWCshttp://l.doh.ms/1nxaWCshttp://l.doh.ms/1nxaWCshttp://l.doh.ms/1nxaWCshttp://l.doh.ms/1nxaWCshttp://l.doh.ms/1nxaWCshttp://l.doh.ms/1nxaWCs

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Video recording

Slides

Books

Object Calisthenics

http://l.doh.ms/1lje5U8http://l.doh.ms/1lje5U8http://l.doh.ms/1lje5U8http://l.doh.ms/1lje5U8http://l.doh.ms/1lje5U8http://l.doh.ms/1lje5U8http://l.doh.ms/1lje5U8http://l.doh.ms/1lje5U8http://l.doh.ms/1lje5U8http://l.doh.ms/1iqkrvBhttp://l.doh.ms/1iqkrvBhttp://l.doh.ms/1iqkrvBhttp://l.doh.ms/1iqkrvBhttp://l.doh.ms/1iqkrvBhttp://l.doh.ms/1iqkrvBhttp://l.doh.ms/1iqkrvBhttp://l.doh.ms/1iqkrvBhttp://l.doh.ms/1iqkrvBhttp://l.doh.ms/1iq6jZchttp://l.doh.ms/1iq6jZchttp://l.doh.ms/1iq6jZchttp://l.doh.ms/1iq6jZchttp://l.doh.ms/1iq6jZchttp://l.doh.ms/1iq6jZchttp://l.doh.ms/1iq6jZchttp://l.doh.ms/1iq6jZchttp://l.doh.ms/1iq6jZchttp://l.doh.ms/1nxaWCs