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Global Day of
Code Retreat 2013
(#gdcr13)
Vienna, Dec. 2013

Peter Kofler, ‘Code Cop’
@codecopkofler
www.code-cop.org
Copyright Peter Kofler, licensed under CC-BY.
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

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

Thanks to Our Local Sponsors

http://www.frequentis.com/

http://www.agentex.at/

http://agileexperts.at/
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Day Structure
Introduction 15'
●
3 Sessions
●

coding 45'
●
retro/break 15'
●

Lunch
●
3 Sessions
●
Retrospective 45'
●
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Coding Dojo Mindset
●

Safe place outside
work

●

We are here to learn

●

Need to slow down

●

Focus on doing it right

●

Collaborative Game
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Code Retreat Principles
●

Learn through pairing (switch pairs)

●

Practice

●

Experiment

●

Have fun!
Coderetreat, http://coderetreat.org/
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Why repeat the same kata?
●

de-emphasise the generation of code

●

concentrate on
●

the process of writing the code

●

naming test cases

●

the Red/Green cycle
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Why delete the code?
No. Listen.
●
Stop trying to go faster, start trying to go
slower.
●
Don't think about finishing, think about
improving.
●
Think about practising. As a team.
●
That's what this day is for. Nothing else.
●

No. Listen. http://www.cyber-dojo.com/
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Four Elements
of Simple Design
●

Passes its tests

●

Minimizes duplication

●

Maximizes clarity

●

Has fewer elements
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Conway's Game of Live
●

infinite, two-dimensional grid of cells

●

interacts with its eight neighbours

●

at each step in time, transitions occur

●

four rules for cells depending on number
of live neighbours

http://en.wikipedia.org/wiki/Conway%27s_Game_of_Life
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Rules of Cell Interaction
Any live cell with fewer than two live
neighbours dies by under-population.
●
Any live cell with two or three live neighbours
lives on to the next generation.
●
Any live cell with more than three live
neighbours dies, as if by overcrowding.
●
Any dead cell with exactly three live neighbours
becomes a live cell, by reproduction.
●

http://en.wikipedia.org/wiki/Conway%27s_Game_of_Life
Don't Focus on
Getting it Done.
Focus on Doing
It Perfectly.
Sessions
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Our Sessions
“Do your best”
●
Ping Pong
●
TDD as if you meant it
●
Ping Pong Mute
●
No Data Structures
●
Evil Pair/Find Loophole
●
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Closing Circle
●

What did you learn today?

●

What surprised you today?

●

What will you do
differently in the
future?
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

Peter Kofler
@codecopkofler
www.code-cop.org

organized by

Mike Leber
@michael_leber
http://agileexperts.at/
PETER KOFLER, CODE-COP.ORG

FANATIC ABOUT CODE QUALITY

CC Images
●

Incense http://www.flickr.com/photos/cibomahto/7651263514/

●

List http://www.flickr.com/photos/kylesteeddesign/3724074594/

●

Dojo http://www.flickr.com/photos/49715404@N00/3267627038/

●

Wants you: http://www.flickr.com/photos/shutter/105497713/

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Global Day of Code Retreat (2013)

  • 1. Global Day of Code Retreat 2013 (#gdcr13) Vienna, Dec. 2013 Peter Kofler, ‘Code Cop’ @codecopkofler www.code-cop.org Copyright Peter Kofler, licensed under CC-BY.
  • 2. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Peter Kofler • Ph.D. (Appl. Math.) • Professional Software Developer for 14 years • “fanatic about code quality” • I help development teams
  • 3. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Thanks to Our Local Sponsors http://www.frequentis.com/ http://www.agentex.at/ http://agileexperts.at/
  • 4. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Day Structure Introduction 15' ● 3 Sessions ● coding 45' ● retro/break 15' ● Lunch ● 3 Sessions ● Retrospective 45' ●
  • 5. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Coding Dojo Mindset ● Safe place outside work ● We are here to learn ● Need to slow down ● Focus on doing it right ● Collaborative Game
  • 6. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Code Retreat Principles ● Learn through pairing (switch pairs) ● Practice ● Experiment ● Have fun! Coderetreat, http://coderetreat.org/
  • 7. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Why repeat the same kata? ● de-emphasise the generation of code ● concentrate on ● the process of writing the code ● naming test cases ● the Red/Green cycle
  • 8. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Why delete the code? No. Listen. ● Stop trying to go faster, start trying to go slower. ● Don't think about finishing, think about improving. ● Think about practising. As a team. ● That's what this day is for. Nothing else. ● No. Listen. http://www.cyber-dojo.com/
  • 9. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Four Elements of Simple Design ● Passes its tests ● Minimizes duplication ● Maximizes clarity ● Has fewer elements
  • 10. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Conway's Game of Live ● infinite, two-dimensional grid of cells ● interacts with its eight neighbours ● at each step in time, transitions occur ● four rules for cells depending on number of live neighbours http://en.wikipedia.org/wiki/Conway%27s_Game_of_Life
  • 11. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Rules of Cell Interaction Any live cell with fewer than two live neighbours dies by under-population. ● Any live cell with two or three live neighbours lives on to the next generation. ● Any live cell with more than three live neighbours dies, as if by overcrowding. ● Any dead cell with exactly three live neighbours becomes a live cell, by reproduction. ● http://en.wikipedia.org/wiki/Conway%27s_Game_of_Life
  • 12. Don't Focus on Getting it Done. Focus on Doing It Perfectly.
  • 14. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Our Sessions “Do your best” ● Ping Pong ● TDD as if you meant it ● Ping Pong Mute ● No Data Structures ● Evil Pair/Find Loophole ●
  • 15. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Closing Circle ● What did you learn today? ● What surprised you today? ● What will you do differently in the future?
  • 16. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY Peter Kofler @codecopkofler www.code-cop.org organized by Mike Leber @michael_leber http://agileexperts.at/
  • 17. PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY CC Images ● Incense http://www.flickr.com/photos/cibomahto/7651263514/ ● List http://www.flickr.com/photos/kylesteeddesign/3724074594/ ● Dojo http://www.flickr.com/photos/49715404@N00/3267627038/ ● Wants you: http://www.flickr.com/photos/shutter/105497713/