1. Kickstart your app with
lenses

2. About me
• Eliasz Sawicki
• Blog www.eliaszsawicki.com
• Twitter @EliSawic

3. Kickstarter

5. Open Source

8. Lenses and Prisms in Swift
Elviro Rocca

9. Reminder

10. Operator
infix operator .~ : PrecedenceGroupName
• infix e.g. 1 + 2
• prefix e.g. !true
• postfix e.g. [1…]

11. Precedence Group
• higher/lower than - eg. 1 + 2 * 3
• associativity - e.g. ((10 / 2) / 2) vs. (10 / (2 / 2))
• assignment - e.g. struct?.b += 10

13. Lenses

16. Lenses

17. Prisms

18. Summary

19. Links
• Kickstarter - https://github.com/kickstarter/ios-oss
• Prelude - https://github.com/kickstarter/Kickstarter-Prelude
• Operators - https://github.com/apple/swift-evolution/blob/
master/proposals/0077-operator-precedence.md
• Lenses and Prisms by Elviro Rocca - https://
broomburgo.github.io/fun-ios/post/lenses-and-prisms-in-swift-
a-pragmatic-approach/
• Lenses in Swift by Brandon Williams - https://youtu.be/
ofjehH9f-CU

20. Thank you