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