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Habits of a Responsible Programmer
- 1. Habits of a Responsible Programmer Anders Janmyr @andersjanmyr http://anders.janmyr.com
- 2. Outline • Definitions • Programming • Project • Life, the Universe and Everything • Summary
- 3. Definitions
- 4. Habit An acquired behavior pattern, regularly followed, until it has become almost involuntary — dictionary.com
- 5. The Conscious Brain Sequential and Slow
- 6. The Unconscious Brain Parallel and Fast
- 7. Habits
- 9. Responsible Accountable for something within one's power or control — dictionary.com
- 11. Programming
- 12. Typing And as for this non-college bullshit I got two words for that: learn to fuckin' type! — Mr. Pink
- 13. Write Clear Code
- 14. Consistent • Follow Conventions • Constants: SCREAMING_SNAKE_CASE • HTML Attributes: dash-er-ized • API: Naming, Ordering, etc.
- 15. Don’t Quick Fix
- 16. Short Classes, Functions, Parameter Lists
- 17. Short Classes, Functions, Parameter Lists
- 20. External Dependencies • Use as few as practical • Learn it well • Wrap them
- 21. Refactor Mercilessly • When understanding changes • Prevents bugs and frustration • Don’t ask for permission!
- 22. Balance
- 23. Prefer Explicit Explicit Implicit Specific Concrete Direct Generic Abstract Indirect function helloWorld() { console.log(‘Hello World’); } function helloWorld() { hello(‘World’); } function hello(thing) { var m = ‘Hello ’+ thing; console.log(m); }
- 24. Learn Basic Techniques • Iteration and Recursion • Conditional Code • Functions and Closures • Classes, Objects, Immutability
- 25. Simple vs. Easy Simple Singular Does one thing Is made of one thing Easy Close at hand Familiar
- 26. Learn Advanced Techniques • Meta-objects and Reflection • Monads and Continuations • Events, Contracts, ... • Actors, Message Queues, ...
- 27. Testing
- 29. What to Unit Test? Message Origin Incoming Sent to Self Outgoing Type Query Command Assert Assert result direct public side effects Ignore Ignore Expect to send
- 30. Documentation
- 31. README • Description • Installation Instructions • Usage Instructions • Examples • Pointers to more documentation
- 32. An Overview
- 33. System Overview Drawing Map Description A few pages Servers Databases External services
- 34. Domain Overview Drawing Map Description A few pages Bounded Context Core Objects Main supporting domains
- 36. Tools • The Editor • The Version Control System • The Command Line • A scripting language • Anything you use on a daily basis
- 37. The Editor
- 39. CV, legacy
- 40. CV, modern
- 42. A Good Commit Message
- 43. Command Line sudo lsof -nPi | grep LISTEN | awk '{printf "%-20s%8s%20sn",$1,$2,$9}' | sort | uniq
- 44. Scripting
- 46. A bash function (≈alias)
- 48. Go away, or I will replace you with a very small shell script!
- 49. Environments
- 50. All Environments • Setup with ONE command • Scripts are continuously maintained
- 51. Production • All configuration, dependencies • Optimized for speed • Configured for monitoring
- 52. Development • As similar as possible to production • Optimized for development speed • Short feedback cycle • Watchers, live reloading, auto testing
- 53. Test • Test Fixtures • Mock services • Recorded API interactions
- 54. Project
- 55. Compromise
- 56. Critique
- 57. Own It!
- 58. Why? Why? Why?
- 59. Estimation
- 60. It is better to ask for forgiveness than to ask for permission! -- Grace Hopper
- 62. Flow
- 63. Focus
- 65. Know what makes you happy!
- 66. Silva’s 4 rules of happiness 1. If you like something, enjoy it! 2. If you don’t like something, avoid it! 3. If you don’t like something and can’t avoid it, change it! 4. If you can’t or choose not to avoid or change it, change your perception of it!
- 68. Relax
- 69. Summary • Write clean code • Test • Script everything • Learn your tools by heart • Optimize for flow
- 70. Proud!
- 71. References http://anders.janmyr.com Habits of a Responsible Programmer Anders Janmyr @andersjanmyr anders.janmyr@jayway.com