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Coding Dojo Agile Riga Day 2012 Johannes Brodwall, Principal Architect Steria Norway @jhannes
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Coding Dojo
Agile Riga Day 2012Johannes Brodwall, Principal Architect
Steria Norway
@jhannes
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
TDDNo 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 factors1 => []
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: Romans1 => 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
OrientationDownload starting point
(http://github.com/steria/extreme_startup_servers)
Start server
Register(http://192.168.11.182:3000/)
Solve questions
RulesCheat like mad!
Only results matter
No destruction of property
Obey local laws
Don’t f$%! with workshop computer
GuidelinesWork as you like
(Tip: Use a language you know)
Help those behind
Upload your code (if possible)
OrientationDownload starting point
(http://github.com/steria/extreme_startup_servers)
Start server
Register(http://192.168.11.182:3000/)
Solve questions
Form teams!
Round 1
Round 1
(fight!)
Round 1: Retrospective
Testing?
Teamwork?
Round 2
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?http://johannesbrodwall.com/2011/12/18/how-to-start-a-coding-dojo/
