CodeLand 2020 Locknote - The Art of Computers - Scott Hanselman
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The document discusses the art of computers and program solving. It covers topics like layering and composition in programming, using patterns that have been seen before, and checking all assumptions when debugging. The document also discusses how sending an email or posting a form is just internet traffic using ports and protocols. It emphasizes reusing good ideas and that computers reveal everything if you want to dig deep enough into applications, files systems, and devices.
CodeLand 2020 Locknote - The Art of Computers - Scott Hanselman
- 1. The Art of Computers Scott Hanselman Person
- 2. The Art of Computers Scott Hanselman, @shanselman Open Source Developer
- 3. The Art of Computers Scott Hanselman TikTok Influencer, CashMe: $shanselman
- 4. The Art of Computers Scott Hanselman I am old
- 6. I hope tech welcomes you warmly!
- 7. Whats the trick? Are Computers Art or Science?
- 11. Simple Thinking Buy a new Toaster
- 12. Systems Thinking Power on? Plug in something else? Blow a fuse? Power on at all? DO THE NEIGHBORS HAVE POWER? EMP? Aliens?
- 13. Early vs. Later in Career Early Google a lot Later One question can eliminate a whole CLASS of problems
- 14. Things to check Assert your assumptions. All of them. Diff the files. They arent the same. IP addresses SSL Certs Ports/Firewalls What changed? What directory are you in? Did you save the file? Dates and times and OMG time zones Environment Variables Permissions Its never twins Sherlock Holmes Check the logs Did it work before? File locked? Can you make a small repro? Is it the right connection string? Literally read the error. Completely. Did you pull from the main branch?
- 16. Layering is vertical. Hiding complexity from yourself and others.
- 20. Maybe you already know it! HTML is text that goes using HTTP over Port 80, right? HTTPS over port 443 Email is the same but uses SMTP and goes over Port 25 or Port 587 Its all just Internet traffic!
- 24. Story
- 25. Story
- 26. Story
- 27. Story
- 28. Story
- 29. Story
- 30. Nothing in the computer is hidden from you. How far do you want to dig? Applications Logical File System File Organization Module Basic File System I/O Control Devices
- 32. Story
- 33. 0D?
- 34. Story
- 35. Story
- 36. Where have I seen that before? 0x0D=13=CR 0x0A=10=LF
- 38. What can we make now?
- 39. I use an Open Source Artificial Pancreas
- 40. We capture sugar values over BT with a phone and upload them to MongoDB
- 41. Then turn it into a REST API for my body
- 42. So I can have my blood sugar *AND* my Git Branch details in my prompt
- 43. Whats the trick? Are Computers Art or Science?
- 44. Whats the trick? Are Computers Art or Science? YES
- 45. We are all amateurs. Quino Al
- 46. There are no professionals. Quino Al
- 47. Do you have 20 years experience? WoC Tech Chat
- 48. Or the same years experience, 20 times? Mike Wilson
- 50. Its OK to be a funny little knife that isnt amazing at everything.
- 51. At least BUT be a good knife. Dont skimp on the basics.
- 52. Thank you and Im so glad youre here! @shanselman