Design of Interfaces

Transcript

1. Design of Interfaces
2. http://xkcd.com/1168/ TAR It seams there’s a XKCD any example you need to make. > There’s a command line program that I use much more often than TAR and that’s GIT
3. Git
4. > git branch make_it_suck_less A lot of the appeal of git, really it’s showcase feature was this concept of easy branching. It’s really easy to do.
5. > git branch make_it_suck_less > git branch make_it_suck_less --delete A lot of the appeal of git, really it’s showcase feature was this concept of easy branching. It’s really easy to do.
6. > git push origin :make_it_suck_less What does this command do? If you didn’t already know... could you tell just by looking at it?
7. When I first saw this command I had to squint really hard to try and figure out why it worked this way.
8. > git push origin :make_it_suck_less What does this command do? If you didn’t already know... could you tell just by looking at it?
9. WHAT ARE YOU PUSHING?
10. > git push origin :lemming
11. push
12. > git push origin :make_it_suck_less WHY THE COLON
13. Torvalds!!!! When I first saw this command I had to squint really hard to try and figure out why it worked this way.
14. > git push origin local_branch:make_it_suck_less It makes more sense after you’ve seen this. This is me pushing my local branch to update the remote branch.
15. > git push origin <null>:make_it_suck_less
16. > git push origin --delete make_it_suck_less Why is this better?
17. Mental Models vs Implementation Models
18. Mental Model Implementation Model Hide the implementation
19. Mental Model Implementation Model How we think something works Hide the implementation
20. Mental Model Implementation Model How we think something works How it actually works Hide the implementation
21. Mental Model Implementation Model How we think something works How it actually works > git push origin --delete make_it_suck_less Hide the implementation
22. Mental Model Implementation Model > git push origin <null>:make_it_suck_less How we think something works How it actually works > git push origin --delete make_it_suck_less Hide the implementation
24. Delete
25. OO Design and BDD
26. Information hiding is the principle that users of a software component (such as a class) need to know only the essential details of how to initialize and access the component and do not need to know the know the details of the implementation. — Timothy Budd, 1991
27. NOT THE CODE YOU THINK YOU NEED WRITE THE CODE YOU WISH YOU HAD
30. Closing Thoughts