Coding Dojo Sofware People 2012 Johannes Brodwall, Principal Architect Steria
Guest starring Dmytro Mindra
Moscow Coding Dojo? how-to-start-a-coding-dojo/
Motivation
Master programming
through practice
What does good programming mean for you? How do you want to apply this on Monday? What do you want to get out of the day?
Agenda
10:10: Demo of TDD and pair programming 10:20: Randori style Leap Years kata with everyone 10:40: Two groups, randori style Prime Factors 11:10: Retrospective 11:30: Two groups, randori style Prime Factors, take 2 12:00: Coding dojo 2: Romans if you’re slow, Yahtzee if you’re quick, minesweeper if you’re smart 13:00 – break in the middle 13:45: Retrospective 14:00: Lunch 15:00: Extreme startup 16:30: Break 17:15: Wrap-up
TDD
No code without test Just enough test to red Just enough code to green (+ refactor!)
Pair programming
Ping/pong Driver/Navigator
Failing test Write code Failing test Write code Failing test
Write code Failing test Write code Failing test Refactor code and tests
What benefits can you get from pair programming?
Kata 0: Leap Year
Kata 1: Prime factors
Kata: Prime factors 1 => [] 2 => [2] 3 => [3] 4 => [2,2] … 2*2*13*17*23*23 => [2,2,13,17,23,23]
Did you change drivers at good frequency? How did the solution end up looking? How did you determine next test? What tests did you start with? Which tests didn’t help you? How did your choice of language help/hurt?
What surprised you? What do you want to achieve next round? What did you learn?
Kata 2a: Minesweeper
Given: var minefield = new Minefield([ "....", ".*..", ".*.*", "...*“ ])
What surprised you? What do you want to achieve next round? What did you learn?
Did you change drivers at good frequency? How did the boundary conditions affect your test and code? How did you determine next test? What tests did you start with? Which tests didn’t help you? How did your choice of language help/hurt?
Kata 2b: Yahtzee
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, three of a kind, four of a kind, full house Yahtzee Little straight, big straight Chance
What surprised you? What do you want to achieve next round? What did you learn?
Did you change drivers at good frequency? What is ({2,2,3,6,6}, «pair»)? How did you determine next test? What tests did you start with? Which tests didn’t help you? How did your choice of language help/hurt?
Kata 2c: Romans
Kata: Romans 1 => I 5 => V 1999 => MCMXCIX
What surprised you? What do you want to achieve next round? What did you learn?
Did you change drivers at good frequency? How did you implement rules for «IV» etc? How did you determine next test? What tests did you start with? Which tests didn’t help you? How did your choice of language help/hurt?
Extreme startup
The Extreme startup code competition By Matt Wynne and Robert Chatly
Orientation Download starting point ( Start server Register ( ) Solve questions
Rules Cheat like mad! Only results matter No destruction of property Obey local laws Don’t f$%! with workshop computer
Guidelines Work as you like (Tip: Use a language you know) Help those behind Upload your code (if possible)
Orientation Download starting point ( Start server Register ( ) Solve questions
Form teams!
Round 1
(fight!)
Round 1: Retrospective
What surprised you? What do you want to achieve next round? What did you learn?
Round 2
(fight!)
Round 2: Retrospective
Retrospective
What surprised you? How will you change how you work? What did you learn?
Testing? Teamwork? Which questions did you solve? Annoying questions? How did you mess up? How did you cheat?
Thank you