Can you Kata?

Presentation on Coding-Katas, given as a keynote at WebTechCon/International PHP Conference 2012. Video of the presentation on http://is.gd/cankatavid and http://youtu.be/kFe01104ovg?hd=1

Transcript

1. Quelle: http://en.wikipedia.org/wiki/File:Skull_and_brain_normal_human.svg
   CAN YOU KATA?
   Sebastian Sanitz - Marko Schulz - Bernd Schiffer
   Karateka: Benno Schöfl
   Katas
   let you
   internalize
   basic steps,
   so you will use them
   subconsciously
   programming
   while
   Slides on http://is.gd/cankata
   Freitag, 19. Oktober 12
   

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2. ܗ Kata
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3. Katas
   let you
   internalize
   basic steps,
   so you will use them
   subconsciously
   programming
   while
   Quelle: http://en.wikipedia.org/wiki/File:Skull_and_brain_normal_human.svg
   Freitag, 19. Oktober 12
   

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4. Learning
   by
   Repetition
   Quelle: failblog.org
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5. Gitarre
   Music
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6. Dance
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7. Martial
   arts
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8. ܗ Kata
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9. Quelle: Bild von Albrecht Pflüger
   1. Kata
   in
   Shōtōkan
   karate
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10. ܗ Kata
    Benno Schöfl
    Karateka for 35 years
    5. Dan
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11. Programming
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12. Tasks
    Small
    focused
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13. path
    Choose a
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14. snapshot
    single
    run
    only
    small
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15. do Katas
    Why ?
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16. Quelle: http://de.wikipedia.org/w/index.php?title=Datei:Kapitolinischer_Pythagoras_adjusted.jpg & http://en.wikipedia.org/wiki/File:Pythagorean_graphic.svg
    a²+b²=c²
    Pythagorean theorem
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17. Reflection
    Self-
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18. Constraints
    and
    Isolation
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19. Memorization
    Muscel
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20. And now, a little bit of
    coding
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21. ROMAN NUMBERS
    • Decode roman Numbers
    DCXXXIX => 639
    • CoffeeScript, Jasmine,
    CodersDojo.com
    • Test driven development:
    Red, Green, Refactor
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22. What
    to
    pay
    attention to
    when training a
    Kata?
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23. Quelle: http://www.flickr.com/photos/dailyjoe/441020930/sizes/l/
    Take
    time
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24. and
    Repeat
    Repeat
    and
    Repeat
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25. Feedback
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26. Try
    alternatives
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27. Quelle: http://www.flickr.com/photos/pgoyette/92358434/sizes/l/
    make it work,
    make it fast
    make it right,
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28. Coderetreats
    honing the craft together
    full day
    together with other professionals
    intensive practice
    http://www.it-agile.de/code-retreat.html
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29. Quelle:http://www.flickr.com/photos/14922165@N00/1022807511
    http://coderetreat.org/
    http://globalday.coderetreat.org/
    Global Day of Coderetreat
    December 8th, 2012
    In D announced til now: Hamburg, Düsseldorf,
    Köln, Frankfurt, Nürnberg, München
    http://www.it-agile.de/code-retreat.html
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30. • Slides on http://is.gd/cankata
    • http://codekata.com
    • http://katas.softwarecraftsmanship.org == http://katacasts.com
    • http://www.codingdojo.org
    • http://codingkata.org
    • http://stackoverflow.com/questions/1737427/assignments-i-e-code-kata-for-coding-dojos
    • http://www.javascriptkata.com/
    • http://www.rubyquiz.com/
    • http://www.programming-challenges.com/
    • http://sites.google.com/site/tddproblems/
    • http://codersdojo.com/
    • Programming tasks from http://rosettacode.org
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31. Quelle: http://en.wikipedia.org/wiki/File:Skull_and_brain_normal_human.svg
    CAN YOU KATA?
    Sebastian Sanitz - Marko Schulz - Bernd Schiffer
    Katas
    let you
    internalize
    basic steps,
    so you will use them
    subconsciously
    programming
    while
    Slides on http://is.gd/cankata
    Freitag, 19. Oktober 12
    

    View Slide

32. Quelle: http://en.wikipedia.org/wiki/File:Skull_and_brain_normal_human.svg
    CAN YOU KATA?
    Sebastian Sanitz - Marko Schulz - Bernd Schiffer
    Slides on http://is.gd/cankata
    Freitag, 19. Oktober 12
    

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33. Prime
    factorization
    Split an integer into its
    prime factors
    Examples
    4 ➔ 2,2
    42 ➔ 2,3,7
    String-Calculator
    1. Sum the numbers in a
    string
    e.g.: „1,2,3“ ➔ 6
    2. Delimiter may be comma
    or newline
    e.g.: „1,3\n5“ ➔ 9
    3. Different delimiter can
    be specified with a /
    / at
    the beginning
    e.g. „/
    /;\n2;4;8“ ➔ 14
    Text munger
    Mutate every word,
    so the first and last chars
    stays the same and inner
    chars are in reversed
    order
    Examples
    Test
    ➔ Tset
    I love you
    ➔ I lvoe you
    Extreme Programming
    rules!
    ➔ Emertxe Pnimmargorg
    relus!
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