Coding Dojo Agile Riga Day 2012 Johannes Brodwall, Principal Architect Steria

Motivation

Master programming

through practice

What is TDD for you? How do you want to apply this on Monday? What do you want to get out of the day?

Agenda

10:05: Demo of TDD and pair programming 10:20: Coding dojo 1: Prime numbers 11:20: Retrospective 11:30: Coding dojo 2: (Romans if you’re slow, Yahtzee if you’re quick, minesweeper if you’re smart) 12:30: Lunch 13:15: Retrospective 13:45: Break (???!)! 14:00: Extreme startup 15:30: Retrospective

TDD

No code without test Just enough test to red Just enough code to green (+ refactor!)

Pair programming

Ping/pong Driver/Navigator

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([ "....", ".*..", ".*.*", "...*“ ])

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?

What surprised you? What do you want to achieve next round? What did you learn?

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

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?

What surprised you? What do you want to achieve next round? What did you learn?

Kata 2c: Romans

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

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?

What surprised you? What do you want to achieve next round? What did you learn?

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

Testing? Teamwork?

Round 2

(fight!)

Round 2: Retrospective

Testing? Teamwork? Which questions did you solve? Annoying questions? How did you mess up? How did you cheat?

Retrospective

What surprised you? What will you do different in the future? What did you learn?

Riga Coding Dojo? how-to-start-a-coding-dojo/

Thank you