Coding Dojo

1. CodingDojo Agile Riga Day 2012 Johannes Brodwall, Principal Architect Steria Norway @jhannes

2. Motivation

3. Master programming

4. throughpractice

5. What is TDD for you? What do youwant to getoutoftheday? How do youwant to applythisonMonday?

6. Agenda

7. 10:05: Demo of TDD and pair programming 10:20: Codingdojo 1: Prime numbers 11:20: Retrospective 11:30: Codingdojo 2: (Romans ifyou’reslow, Yahtzee ifyou’requick, minesweeper ifyou’re smart) 12:30: Lunch 13:15: Retrospective 13:45: Break (???!)! 14:00: Extreme startup 15:30: Retrospective

8. TDD

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

10. Pair programming

11. Ping/pong Driver/Navigator

12. Whatbenefitscanyouget from pair programming?

13. Kata 0: LeapYear

14. Kata 1: Prime factors

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

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

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

18. Kata 2a: Minesweeper

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

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

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

23. Kata 2b: Yahtzee

24. 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

25. 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»)?

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

27. Kata 2c: Romans

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

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

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

31. Extreme startup

32. The Extremestartupcodecompetition By Matt Wynne and Robert Chatly

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

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

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

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

37. Form teams!

38. Round 1

39. Round 1 (fight!)

40. Round 1: Retrospective

41. Testing? Teamwork?

42. Round 2

43. Round 2 (fight!)

44. Round 2: Retrospective

45. Testing? Howdidyou mess up? Howdidyoucheat? Whichquestionsdidyousolve? Annoyingquestions? Teamwork?

46. Retrospective

47. Whatsurprisedyou? Whatdidyoulearn? Whatwillyou do different in thefuture?