Extreme Programming Live WeActuallyBuildStuff Johannes Brodwall Exilesoft Chief Guest starring: Chaminda Sooriyapperuma

How do you become a better programmer

After this talk You may find desire to train with TDD You may pair program sometimes You may think of some ways to improve the way you work

1.Waddayamean «extreme programming» 2.What to look for 3.Demonstration 4.Discussion 5.Conclusion

«Extreme programming»?

It is better to Do the thing right, then to Do the right thing (first)

Ping pong

Ingredient #1: Pair programming

Ingredient #2: Test driven development

Failing test Write code Failing test Write code Failing test

Ingredient #3: Refactoring

Failing test Write code Failing test Write code Failing test Refactor code and tests

Put together

Failing test Write code Failing test Write code Failing test

Write code Failing test Write code Failing test Refactor code and tests

Failing test Write code Failing test Write code Failing test Refactor code and tests

Demonstration

What to watch for?

How do we work together? How do we use tests to understand? How do we «grow» the code?

Please: Talk about what you see to the person next to you (whisper) Tweet

Demonstration (Guest starring Chaminda Sooriyapperuma)

Kata: Prime factors

1 => [] 2 => [2] 3 => [3] 4 => [2,2] … 2*2*13*17*23*23 => [2,2,13,17,23,23]

What did you see?

How often did we switch ”driver”? Effects of pairing? What did the ”non-driver” do? How do you expect it to be different?

What do you think? Pairing two seniors? Pairing two juniors? Pairing senior and talent? Pairing senior and junior?

What did you see? How many tests? Was the step size right? What was the first test? How did we decide next test? What was the final test?

What did you see? Did we refactor the right amount? How long was the code red? Strengths in final design Weaknesses in final design Enough comments?

Questions? Your experience?

Becoming a better programmer

Why become better programmer?

Getting better quality

Correctness Maintainability Productivity

But more importantly!

Think better

Think beyond the curly brackets

How to get better

Practice

Deliberate Practice Slow down Repeat Reflect

Practice at school

Tests lets you solve it faster

Practice at home

Learn more here

Practice with friends

What have you learned TDD makes you productive TDD consists of small steps TDD requires practice Pair programming is fun Pair programming helps you keep flow

+ TDD & different different Levels of quality

Conclusion

Free your mind

Practice our art

Thank you