This document outlines Peter Kofler's coding dojo on tic-tac-toe. The dojo focuses on collaborative coding through a ping-pong process where one developer writes a test and the other writes code to pass the test. The dojo structure includes introductions, coding sessions, breaks, and retrospectives. The exercise is to collaboratively code a tic-tac-toe game through the ping-pong process while focusing on quality over speed.

1. Coding Dojo:
Tic-Tac-Toe
March 2014
Peter Kofler, ‘Code Cop’
@codecopkofler
www.code-cop.org
Copyright Peter Kofler, licensed under CC-BY.

2. Peter Kofler
• Ph.D. (Appl. Math.)
• Professional Software
Developer for 14 years
• “fanatic about code quality”
• I help development teams
PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY

3. Coding Dojo?
Expectations?

4. Coding Dojo Mindset
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Safe place outside
work
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We are here to learn
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Need to slow down
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Focus on doing it right
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Collaborative Game
PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY

5. Dojo Structure
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Introduction 15'
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Coding 45'
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Interim (Retrospective) 15'
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Break 20'
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Coding 45'
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Retrospective 30'
PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY

6. The Exercise: Tic-Tac-Toe
PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY

7. Tic-Tac-Toe
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http://en.wikipedia.org/wiki/Tic-tac-toe
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Board 3x3
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X plays first, O plays second
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Check who/if is winner after moves
PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY

8. Don't Focus on
Getting it Done.
F0cus on Doing
It Perfectly.

9. →Practice

10. Constraint: Ping-Pong
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A writes a test and sees that it fails.
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B writes the code needed to pass the test.
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B writes next test and sees that it fails.
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A writes the code needed to pass the test.
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And so on.
PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY

11. Closing Circle
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What did you learn today?
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What surprised you today?
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What will you do
differently in the
future?
PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY

12. Peter Kofler
@codecopkofler
www.code-cop.org
PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY

13. CC Images
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Dojo http://www.flickr.com/photos/49715404@N00/3267627038/
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Todos http://www.flickr.com/photos/kylesteeddesign/3724074594/
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Game http://www.flickr.com/photos/benclinch/476855843/
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Wants you http://www.flickr.com/photos/shutter/105497713/
PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY