Code Dojo is a practice session where pairs of programmers focus on coding katas for 25 minute intervals, followed by 5 minute breaks. Katas include converting numbers to Roman numerals and following simple design rules like passing all tests and minimizing classes/methods. Programmers pair up and use techniques like test-driven development, switching pairs each session. Reflection on lessons learned is included at the end.

1. Code Dojo

2. dojo
A dojo ( 道場) is a Japanese term which literally means
"place of the way".

3. KATA
A sequence of positions and movements used in a practice
session.

4. Practice
Malcom Gladwell: “You have to do 10,000 hours of practice
to be virtuoso.”
Practice must:
be focused
stretch your abilities
be deliberate
include self-reflection

5. dojo kun
We respect each other’s commitment
i.e. no phones, mail, Facebook, etc. Focus!
We all do pair programming
We all do TDD
We swap pairs each cycles
We follow “Simple Design” rules

6. simple design
Simple design is code that:
Passes all tests
Is clear, expressive and consistent
Duplicates no behaviour or configuration
Minimises the number of class, methods and modules

7. Format
Pair up
Problem presentation
Each cycle is:
a pomodoro (25 mins)
five minute break to demo your code and grab some pizza

8. Roman KATA
Convert an integer to its Roman numeral
1 -> I
5 -> V
10 -> X
Add numbers together
3 -> III
12 -> XII

9. Roman kata 2
Smaller number before larger one means subtraction,
e.g. 4 = IV
Convert hundreds, tens and units separately.
999 is not IM
999 is CMXCIX

10. Roman KATA 3
Only one small-value symbol may be subtracted from any
large-value symbol.
The symbols "I", "X", "C", and "M" can be repeated three
times in succession, but no more. (They may appear more
than three times if they appear non-sequentially, such as
XXXIX.) "D", "L", and "V" can never be repeated.
"I" can be subtracted from "V" and "X" only. "X" can be
subtracted from "L" and "C" only. "C" can be subtracted
from "D" and "M" only. "V", "L", and "D" never subtract.

11. Roman kata 4

12. Go!!
HAJIME!!
(start now)
http://tomatoi.st/dojo

13. YAME!!

14. Show and tell

15. Reflection

16. Credits
http://www.meetup.com/London-Code-Dojo/
@sleepyfox (Nigel Runnels-Moss)