Coding Dojo

1. CodingDojo AgilePrague 2012 Johannes Brodwall, Principal Architect Steria Norway @jhannes

6. PragueCodingDojo? http://johannesbrodwall.com/2011/12/18/how-to-start-a-coding-dojo/

7. Motivation

8. Master programming

9. throughpractice

10. Whatdoesgoodprogrammingmean for you? What do youwant to getoutoftheday? How do youwant to applythistomorrow?

11. Agenda

12. 9:10: Demo of TDD and pair programming 9:20: Randori style LeapYearskatawitheveryone 9:40: Paired style Prime Factors 10:10: Retrospective 10:30: Paired style Prime Factors, take 2 11:00: Codingdojo 2: Romans ifyou’reslow, Yahtzee ifyou’requick, minesweeper ifyou’resmart 12:00: Retrospective 12:15: Lunch (?) 13:00: Extreme startup – first round 13:30: Break 13:45: Extreme startup – secondround 15:45: Wrap-up

13. TDD

14. TDD No codewithout test Just enough test to red Just enoughcode to green (+ refactor!)

15. Pair programming

16. Ping/pong Driver/Navigator

17. Failing test Write code Failing test Write code Failing test

18. Failing test Write code Refactorcode and tests Failing test Write code Refactorcode and tests Failing test

19. Whatbenefitscanyouget from pair programming?

20. Kata 0: LeapYear

21. Kata 1: Prime factors

22. Kata: Prime factors 1 => [] 2 => [2] 3 => [3] 4 => [2,2] … 2*2*13*17*23*23 => [2,2,13,17,23,23]

23. How didyourchoiceoflanguagehelp/hurt? Didyouchange drivers at goodfrequency? What tests didyou start with? Which tests didn’thelpyou? How didyoudeterminenext test? How didthesolution end up looking?

24. Whatsurprisedyou? Whatdidyoulearn? What do you want to achieve next round?

25. Kata 2a: Minesweeper

26. Given: var minefield = new Minefield([ "....", ".*..", ".*.*", "...*“ ])

28. Whatsurprisedyou? Whatdidyoulearn? What do youwant to achievenextround?

29. How didyourchoiceoflanguagehelp/hurt? Didyouchange drivers at goodfrequency? What tests didyou start with? Which tests didn’thelpyou? How didyoudeterminenext test? How didtheboundaryconditionsaffectyour test and code?

30. Kata 2b: Yahtzee

31. Kata: Yahtzee ({1,1,1,1,1}, «ones»} => 5 ({1,1,1,1,1}, «sixes»} => 0 ({1,1,1,1,1}, «yahtzee»} => 50 Ones, twos, threes, fours, fives, sixes Pair, two pairs, threeof a kind, fourof a kind, full house Yahtzee Little straight, big straight Chance

32. Whatsurprisedyou? Whatdidyoulearn? What do youwant to achievenextround?

33. How didyourchoiceoflanguagehelp/hurt? Didyouchange drivers at goodfrequency? What tests didyou start with? Which tests didn’thelpyou? How didyoudeterminenext test? What is ({2,2,3,6,6}, «pair»)?

34. Kata 2c: Romans

35. Kata: Romans 1 => I 5 => V 1999 => MCMXCIX

36. Whatsurprisedyou? Whatdidyoulearn? What do youwant to achievenextround?

37. How didyourchoiceoflanguagehelp/hurt? Didyouchange drivers at goodfrequency? What tests didyou start with? Which tests didn’thelpyou? How didyoudeterminenext test? How didyouimplementrules for «IV» etc?

38. Extreme startup

39. The Extremestartupcodecompetition By Matt Wynne and Robert Chatly

40. Orientation Download starting point (http://github.com/steria/extreme_startup_servers) Start server Register (http://192.168.155.249:3000/) Solvequestions

41. Rules Cheat like mad! Onlyresults matter No destructionofproperty Obeylocallaws Don’t f$%! withworkshop computer

42. Guidelines Work as you like (Tip: Use a languageyou know) Helpthosebehind Uploadyourcode (ifpossible)

43. Orientation Download starting point (http://github.com/steria/extreme_startup_servers) Start server Register (http://192.168.155.249:3000/) Solvequestions

44. Form teams!

45. Round 1

46. Round 1 (fight!)

47. Round 1: Retrospective

48. Whatsurprisedyou? Whatdidyoulearn? What do youwant to achievenextround?

49. Round 2

50. Round 2 (fight!)