Coding Dojo

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

2. Gueststarring DmytroMindra

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

8. Motivation

9. Master programming

10. throughpractice

11. Whatdoesgoodprogrammingmean for you? What do youwant to getoutoftheday? How do youwant to applythisonMonday?

12. Agenda

13. 10:10: Demo of TDD and pair programming 10:20: Randori style LeapYearskatawitheveryone 10:40: Twogroups, randori style Prime Factors 11:10: Retrospective 11:30: Twogroups, randori style Prime Factors, take 2 12:00: Codingdojo 2: Romans ifyou’reslow, Yahtzee ifyou’requick, minesweeper ifyou’resmart 13:00 – break in themiddle 13:45: Retrospective 14:00: Lunch 15:00: Extreme startup 16:30: Break 17:15: Wrap-up

14. TDD

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

16. Pair programming

17. Ping/pong Driver/Navigator

18. Failing test Write code Failing test Write code Failing test

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

20. Whatbenefitscanyouget from pair programming?

21. Kata 0: LeapYear

22. Kata 1: Prime factors

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

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

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

26. Kata 2a: Minesweeper

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

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

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

31. Kata 2b: Yahtzee

32. 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

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

34. 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»)?

35. Kata 2c: Romans

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

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

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

39. Extreme startup

40. The Extremestartupcodecompetition By Matt Wynne and Robert Chatly

41. Orientation Download starting point (http://github.com/steria/extreme_startup_servers) Start server Register (http://192.168.11.182:3000/) Solvequestions

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

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

44. Orientation Download starting point (http://github.com/steria/extreme_startup_servers) Start server Register (http://192.168.11.182:3000/) Solvequestions

45. Form teams!

46. Round 1

47. Round 1 (fight!)

48. Round 1: Retrospective

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

50. Round 2