Experience Agile Programming
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Experience Agile Programming as presented at Software People 2012 in Moscow. Guest starring Boris Staal
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Experience Agile Programming
- 1. Experience Agile Programming ŠŠ¾Ń Š°Š½Š½ŠµŃ ŠŃŠ¾Š“Š²Š°Š»Š» Featuring: Š”ŃŠµŃŠøŃ ŠŠ¾ŃŠ²ŠµŠ³ŠøŃ Boris Staal
- 2. Experience Agile Programming Software People 2012, Moscow ŠŠ¾Ń Š°Š½Š½ŠµŃ ŠŃŠ¾Š“Š²Š°Š»Š», Just-a-programmer Š”ŃŠµŃŠøŃ ŠŠ¾ŃŠ²ŠµŠ³ŠøŃ @jhannes
- 3. Goal ā¢ To have fun now! ā¢ For you to have fun now! ā¢ For you to have fun later (stretch goal)
- 4. Agenda ā¢ Description ā¢Demonstration with Boris Staal ā¢ Discussion ā¢ Tips and tricks
- 5. Please: ā¢ Talk about what you see to the person next to you (whisper) ā¢Tweet to @jhannes and @_inossidabile in English or Russian
- 6. Description
- 10. Given: var minefield = new Minefield([ "....", ".*..", ".*.*", "...*ā ])
- 11. What do watch for ā¢ How we interact ā¢ How we progress through the code ā¢ How we design ā¢ How we use the language
- 12. Demonstration (Featuring Boris Staal)
- 13. What did you see?
- 14. What did you see? ā¢ How often did we switch ādriverā? ā¢ Effects of pairing? ā¢ What did the ānon-driverā do?
- 15. What did you see? ā¢ Was the step size right? ā¢ What was the first test? ā¢ How did we decide next test? ā¢ What was the final test?
- 16. What did you see? ā¢ Language tricks? ā¢ Did we refactor the right amount? ā¢ How long was the code red? ā¢ Strengths in final design ā¢Weaknesses in final design
- 17. Why become better at programming?
- 18. Seriously. Why?
- 19. Only 13.37% of effort
- 21. Getting better quality Correctness Maintainability
- 23. Think better
- 24. Think better Raise your level of abstraction
- 25. What to practice
- 27. Test the contract API Not behavior
- 32. Ping pong
- 33. Failing test Write code Failing test Write code Failing test
- 34. Failing test Write code Refactor code and tests Failing test Write code Refactor code and tests Failing test
- 35. Johannes Dmytro Dmitro Sergey Volodymyr
- 36. Johannes Boris Dmitro Sergey Volodymyr
- 37. Johannes Boris Dmitro Sergey Volodymyr
- 39. All-green refactoring Reduce the time of uncertainty
- 40. How to practice
- 41. Practice Practice at work Practice katas Practice in dojos
- 42. Moscow Coding Dojo?
- 47. Moscow Coding Dojo (tweet @jhannes)
- 48. Conclusion
- 49. Conclusion Free your mind
- 50. Free your mind Practice our art
- 51. Thank you johannes.brodwall@steria.no http://johannesbrodwall.com http://twitter.com/jhannes (Please tweet in Cyrillic with english-like words)
Editor's Notes
- Note to translator: I willexplainthe game of minesweeper whileshowingthis slide.The game initiallypresents a fieldwheretherearehidden minesWhentheplayerclickson a cell, eitherhe Ā«stepsĀ» on a mine or he reveals thecellIf he Ā«stepson a mineĀ», the game is over, player losesIf he reveals thecell, thecelltellshowmany mines arenext to it
- Note to translator: I willexplainthe game of minesweeper whileshowingthis slide.The game initiallypresents a fieldwheretherearehidden minesWhentheplayerclickson a cell, eitherhe Ā«stepsĀ» on a mine or he reveals thecellIf he Ā«stepson a mineĀ», the game is over, player losesIf he reveals thecell, thecelltellshowmany mines arenext to it
- Note to translator:Here I willexplaintheworkingofthe program wewillcreate:Given a definitionof a minefieldwith mines as stars and non-mines as periods, the program should output the hints for eachcell (as in theprevious screen shot)Ā«If youāre not familiarwith mine sweeper, youcan just ask a project managerĀ»
- Note to translator: Here, Iwill ask the English speakingmembersoftheaudience to give feedback onwhattheysaw. I will hand outchocolates to those to answer. ļ
- Note to translator: If thereās not toomany questions beforethis, I willdemonstratethiscodewith in Eclipse, ratherthan talk about it.
- Note to translator: If thereās not toomany questions beforethis, I willdemonstratethiscodewith in Eclipse, ratherthan talk about it.
- Note to translator: Here, I willexplainhow pair programmingcanwork in practice:One person writes a failing test and theother person writesthecode to make it pass. Thenthe person whomadethe test pass writesthenext test.In theexamplewithme and Boris, weswitched Ā«driversĀ» (the person at thekeyboard) aboutonce a minute. On real lifeproject, I usuallyexperiencethatweswitch drivers everytenminutes or so.Itās alsoimportant to refactorbetween tests. I like to onlyrefactorwhenthecode is green. This way I knowthatthecodedoesnāt stop working. Therearetwoways to thinkaboutthis:Either, ifyoucan, refactorthecode and the tests a little to Ā«getreadyĀ» for thenext testOr, ifyouseethatyoucanāt make the test pass, commentout (or @Ignore) the test and refactoron green.
- Note to translator:Here I willexplain a Ā«pair programming starĀ».If the team feels it wouldbenefit from more programmers pair programmingwitheachother, youcancreate a Ā«pair programming starĀ».First, writethenamesofeach team member in a circleWhensomeone pair program withsomeoneelse, put a line betweentheirnamesThe resulting Ā«starĀ» can be used to reflectonyour team. Itās not necessarily a bad thingthat Sergey and Dmitro program together a lot, butitāsworthnoting
- Note to translator: I may show a practical demo here, iftheaudiencewants it
- Note to translator: On thefollowing screenshots, therearepictures from Oslo CodingDojo and Kiev CodingDojo. I willexplain (eachbulletpointononeofthefollowing slides):WemeetaboutonceeverymonthWeusuallymeet in a pub and program around a projector (withbeer!)We have also done a Code Retreat, where 24 peoplesetaside a full Saturday to practicecoding. Ā«During theweek, youcode for money. Today, youcode for youĀ»After I gave this talk in Kiev, AlekseySolntsev and othersorganized Kiev codingdojoAnyvolunteers to organize a CodingDojo in Moscow?