Coderetreat @Vienna 2013 06 08

Code retreat

www.mozaicworks.com

http://www.mozaicworks.com/

www.mozaicworks.com

Me

Adi BolboacaOrganizational & Technical

Trainer & Coach


Why?

Learn through pairingExtend your comfort zone

PracticeExperiment

Learn new practices

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How?

1 day of codingChoose a simple problem

6 pairing partnersOn average 135 minutes of coding

6 different constraintsA lot of fun!

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How it started

CodeMash conference 2009

Gary BernhardtPatrick Welsh

Nayan HajratwalaCorey Haines

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How it started

RepeatableDay-long

Practice the fundamentals of programmingIntense day of coding

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Day structure

15' introduction3 sessions of 45' coding + 15' retro&break

1h lunch3 sessions of 45' coding + 15' retro&break

15' closing circle

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Principles

Language agnosticDo not try to finish the problem

Delete the code after each sessionFocus on practicing

Experiment each sessionHave fun!

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Prerequisites

ComputerCoding environmentTesting framework

Source control (git, svn, etc)

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The four elements of simple design

1) Passes its tests2) Minimizes duplication

3) Maximizes clarity4) Has fewer elements

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Conway's game of life

Having an infinite 2D orthogonal universeBeing given an initial generation called a seedThe following rules are applied simultaneously

A live cell having less than 2 live neighbors diesA live cell having 2 or 3 live neighbors lives A live cell having more than 3 neighbors diesA dead cell having 3 neighbors becomes alive

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First session

Find a pairChoose a programming language

Setup the environmentChoose an entry point for the problem

Start in 5 min

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Conway's game of life

Having an infinite 2D orthogonal universeBeing given an initial generation called a seedThe following rules are applied simultaneously

A live cell having less than 2 live neighbors diesA live cell having 2 or 3 live neighbors lives A live cell having more than 3 neighbors diesA dead cell having 3 neighbors becomes alive

www.mozaicworks.com


Second session

No data structuresUse only one dot/arrow per line

Use domain language



Focus on refactoring

Use naming that reveals intentRename concepts to improve naming (use

domain language)

Extract duplicate identical chunks of codeExtract methods having the same noun into their

classSplit methods containing Or, And in their names



Code retreat

1 hour Lunch



Taking Baby Steps1) Initialize source control repository2) Start a timer for 2 minutes3) Write exactly one testa) Timer rings, the test is red, then revert and go to 2)b) The test is green before the timer rings, then commit

4) Restart timer5) Refactora) Timer rings, the refactoring is not complete then revert and restart

b) The refactoring is complete before the timer rings, commit and go to 2)

Obs.The timers must run continuously, don't stop to talk! www.mozaicworks.com

Twitter:#crVIE13


Focus on Incremental Design

Introduce only one notion at a timeWrite down which notions you introduced

Note down the steps/tests you took



Pair-Programming Games

Ping-PongEvil Pairing



Closing circle

1) How did you feel? 2) What did you learn today?

3) What will you do differently tomorrow?



Code retreatWhy?

Learn through pairingExtend your comfort zone

PracticeExperiment

Learn new practices



Contact me● Remote pair-programming● Unit testing workshop● Test driven development workshop● Clean code workshop● Refactoring workshop● Legacy code retreat● Legacy code workshop● Code retreat

www.mozaicworks.com


Code retreatExtend your mentoring & training capacity

Accelerate learning through communities of practice

Grow your functional leaders and top talents

http://www.mozaicworks.com

[email protected]

@adibolb

Coderetreat @Vienna 2013 06 08

Technology

Transcript of Coderetreat @Vienna 2013 06 08