Coding dojo

Coding dojo

WeActuallyBuildStuffJohannes Brodwall, Chief scientist

Exilesoft

1. What is a dojo?

2. Ping-pong demo

3. First kata

4. First kata, repeat

5. Second kata

6. Competition

7. Wrap-up

«Coding dojo»?

ProgrammersPractice

People

ProgrammersPractice

Social

«Deliberate practice is your highway

to becoming an expert.»

«Slowing down is really the key to get any skill under your

belt.»

«In order to master any move or action

you need to make a lot of repetitions.»

Reflect on different approaches

ProgrammersPractice

People

Failing test

Write code

Failing test

Write code

Failing test

Failing test

Write code

Failing test

Write code

Failing test

Refactor code and tests

Refactor code and tests

Failing test

Write code

Failing test

Write code

Failing test

Failing test

Write code

Failing test

Write code

Failing test

Refactor code and tests

Refactor code and tests

What effect will this have?

Kata: Leap years

Dojo format:

1. Select kata

2. Plan approach

3. Work

4. Reflect

5. Repeat

Katas:

Kata: Prime factors1 => []

2 => [2]

3 => [3]

4 => [2,2]

…

2*2*13*17*23*23 => [2,2,13,17,23,23]

Approach:

Which tests?

How long do we need?

Reflect

What surprised you?

What do you want to achieve next round?

What did you learn?

Kata: Prime factors1 => []

2 => [2]

3 => [3]

4 => [2,2]

…

2*2*13*17*23*23 => [2,2,13,17,23,23]

Reflect

What surprised you?

What do you want to achieve next round?

What did you learn?

Kata: Romans1 => I

5 => V

1999 => MCMXCIX

Which tests?

Reflect

What surprised you?

What do you want to achieve next round?

What did you learn?

Kata: Minefield

[ "....", ".*..", ".*.*", "...*“ ]

[ “1110", “2*31", “2*4*", “113*” ]

=>

Reflect

What surprised you?

What do you want to achieve next round?

What did you learn?

Minesweper competition

16 rows

30 columns

99 mines

Reflect

What surprised you?

What do you want to achieve next round?

What did you learn?

Repeat

Reflect

What surprised you?

Your plan to change how you work?

What did you learn?

Conclusion:

Deliberate practice will make you a master

developer!

Thank you jbr@exilesoft.com

http://johannesbrodwall.com

http://exilesoft.com

https://github.com/anders88/sweeper_game

http://twitter.com/jhannes

Watch this space!