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Herding cats for fun and profit — growing your APL business

Joakim Hårsman Profdoc Care AB. Herding cats for fun and profit — growing your APL business. What’s this about?. Who am I and what am I doing here? What we do at Profdoc Care How we’ve grown, obstacles to overcome Recruiting Managing your code base — Tools. TakeCare - It’s HUGE.

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Herding cats for fun and profit — growing your APL business

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  1. Joakim Hårsman Profdoc Care AB Herding cats for fun and profit — growing your APL business

  2. What’s this about? • Who am I and what am I doing here? • What we do at Profdoc Care • How we’ve grown, obstacles to overcome • Recruiting • Managing your code base — Tools

  3. TakeCare - It’s HUGE

  4. TakeCare – it’s complex

  5. TakeCare – it’s pretty big 1.8 million medical records 30 000 (mostly) happy users 300 000 lines of APL in 12 000 functions 200 transactions per second (during office hours) 1 TB of data, mostly in component files All in Dyalog APL (obviously!)

  6. Profdoc Care – getting bigger!

  7. Obstacles

  8. #@☠★☣!

  9. Regular programmer

  10. Recruiting

  11. How to hire APL programmers • Don’t hire APL programmers • Filter out bad candidates early • Try to find indicators of greatness early • Have candidates write code during the interview

  12. It works! (for us)

  13. Growing pains

  14. Better documentation

  15. Slowing down — fewer releases

  16. More code review (and testing) ⍎⊖⍕⊃⊂|⌊-*+○⌈×÷!⌽⍉⌹~⍴⍋⍒,⍟?⍬

  17. Better tools!

  18. I ♥ unicode! grep my_code.apl join←{ 0=⍴,⍵:⍵ (-⍴,⍺)↓⊃,/⍵,¨⊂⍺ } foldl←{ ⊃⍺⍺⍨/(⌽⍵),⊂⍺ }

  19. Diff and Merge In file: [2] (-⍴,⍺)↓⊃,/⍵,¨⊂⍺ In WS: [2] (-⍴,⍺⍺)↓⊃⊃,/⍵,¨⊂⍺

  20. WinMerge

  21. Ediff (in Emacs)

  22. Source control

  23. Automation

  24. Conclusion • Hire great programmers • Get your source code into Emacs • ??? • Profit! (I might need to be more explicit in step three)

  25. Questions? joakim.harsman@profdoc.com

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