Download to read offline
![String Calculator Kata
“” 0
“1” 1
“1,2” 3
//[***][%%]n1***2%%3 6](https://image.slidesharecdn.com/stringkatain20minutes-150601120424-lva1-app6891/75/String-kata-in-20-minutes-6-2048.jpg)
String kata in 20 minutes
- 1. String Kata Brendon Page Howit made me a better developer
- 2. Me twitter @brendonpaginate blog http://geekswithblogs.com/brendonpage SoftwareDeveloper @ Chillisoft
- 3.
- 4.
- 5.
- 6. String Calculator Kata “” 0 “1” 1 “1,2” 3 //[***][%%]n1***2%%3 6
- 7.
- 9. This should beeasy Let’s do this thing
- 10. Oh noes thisis hard! First Attempt
- 11. Slow improvement Slowly growingconfidence
- 12. Light bulb moments Burstsof improvement
- 13. Oh yea! < 30minutes
- 14. You’re doing itwrong! First assessment
- 15. More improvement Struggle togo from 30 -> 20
- 16. Oh yea! < 20minutes
- 17. Grrrr … Okay nowrecord it
- 18. Oh yea! Recorded runin < 20 minutes
- 19. Fail Refactored while underthe red
- 20. Profit! Perfect recorded runin < 20 minutes
- 21.
- 22. Well done you arenow so damn awesome at writing a string calculator! I Know What You’re Thinking
- 23.
- 24.
- 25.
- 26.
- 27. Pattern Do it every morning for30 minutes
- 28. Deliberate Practice Model Reachfor target
- 29.
- 30. Why Deliberate Practice? Insulated pathwaysare more effective
- 31. Why Deliberate Practice? Skillsare insulated neural pathwaysAnd it grows slowly!!!
- 32.
- 33. Apply the Model Reachfor target
- 34.
- 35.
- 36.
- 37. Don’t worry slow accuraterepetition is good. Slow
- 38.
- 39.
- 40. Struggle Try stay inthe space just beyond your current abilities
- 41.
- 42.
- 43. Summary Become better by deliberatelydeveloping the skills you want
- 44.
Editor's Notes
- #7 9 steps, string input, summed output 1) “”, “1”, “1,2” 2) “1,2,3,4,5” 3) “1\n2,3” 4) “//[^]\n1^2” 5) No negative number allowed 6) Ignore numbers > 1000 7) “//[^^^^]\n1^^^^2” 8) //[*][%]\n1*2%3 9) “//[***][%%]\n1***2%%3”
- #8 Strict TDD Clean code (yes from the book) Intent revealing names Verb-phrase method names Methods must be small, do one thing and have no side effects Code must be DRY No debugger allowed Must be able to explain what and why you are doing something Why did you do that refactoring now? Why did you choose that test to write next? And no mouse!!!! When you get it in < 30 minutes, get it assessed
- #33 Chunk it up Break it into chunks Slow it down Absorb the whole thing Repeat it Feel it Productive uncomfortable terrain located just beyond our current abilities, where our reach exceeds our grasp. Deliberate practice isn’t just about struggling; it’s about seeking out a particular struggle, which involves a cycle of distinct actions (Deliberate Practice Model).
- #36 Break it into chunks
- #38 Slow down
- #39 Repeat it
- #40 Repeat it
- #41 Productive uncomfortable terrain located just beyond our current abilities, where our reach exceeds our grasp. Deliberate practice isn’t just about struggling; it’s about seeking out a particular struggle, which involves a cycle of distinct actions (Deliberate Practice Model).